mirror of
https://github.com/torvalds/linux.git
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v7.2-rc1
38 Commits
| Author | SHA1 | Message | Date | |
|---|---|---|---|---|
Linus Torvalds
|
335c347686 |
slab changes for 7.2 - part 2
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Merge tag 'slab-for-7.2-part2' of git://git.kernel.org/pub/scm/linux/kernel/git/vbabka/slab
Pull more slab updates from Vlastimil Babka:
- Introduce and wire up a new alloc_flags parameter for modifying
slab-specific behavior without adding or reusing gfp flags. Also
introduce slab_alloc_context to keep function parameter bloat in
check. Both are similar to what the page allocator does.
kmalloc_flags() exposes alloc_flags for mm-internal users.
- SLAB_ALLOC_NOLOCK flag is used to implement kmalloc_nolock()
behavior without relying on lack of __GFP_RECLAIM, which caused
false positives with workarounds like
|
||
|
Linus Torvalds
|
a552c81ff4 |
mm.git review status for mm-hotfixes-stable..mm-stable
Everything:
Total patches: 321
Reviews/patch: 1.52
Reviewed rate: 68%
Excluding DAMON:
Total patches: 227
Reviews/patch: 2.07
Reviewed rate: 90%
Excluding DAMON and selftests:
Total patches: 203
Reviews/patch: 2.14
Reviewed rate: 91%
Patchsets in this merge:
- The 2 patch series "selftests/mm: clean up build output and verbosity"
from Li Wang removes some noise from the MM selftests build out.
- The 3 patch series "mm: Free contiguous order-0 pages efficiently"
from Ryan Roberts speeds up the freeing of a batch of 0-order pages by
first scanning them for coalescing opportunities. This is applicable to
vfree() and to the releasing of frozen pages.
- The 11 patch series "mm/damon: introduce DAMOS failed region quota
charge ratio" from SeongJae Park addresses a DAMOS usability issue: The
DAMOS quota often exhausts prematurely because it charges for all memory
attempted, causing slow and inconsistent performance when actions fail
on unreclaimable memory.
To fix this, a new feature lets users set a smaller, flexible quota
charge ratio (via a numerator and denominator) for failed regions.
Since failed actions cause less overhead, reducing their quota cost
ensures more predictable and efficient DAMOS processing
- The 8 patch series "selftests/cgroup: improve zswap tests robustness
and support large page sizes" from Li Wang fixes various spurious
failures and improves the overall robustness of the cgroup zswap
selftests.
- The 3 patch series "fix MAP_DROPPABLE not supported errno" from
Anthony Yznaga fixes an issue in the mlock selftests on arm32.
- The 2 patch series "mm: huge_memory: clean up defrag sysfs with
shared" from Breno Leitao does some maintenance work in the huge_memory
code.
- The 3 patch series "treewide: fixup gfp_t printks" from Brendan
Jackman uses the special vprintf() gfp_t conversion in various places.
- The 6 patch series "mm: Fix vmemmap optimization accounting and
initialization" from Muchun Song fixes several bugs in the vmemmap
optimization, mainly around incorrect page accounting and memmap
initialization in the DAX and memory hotplug paths. It also fixes
pageblock migratetype initialization and struct page initialization for
ZONE_DEVICE compound pages.
- The 4 patch series "mm/damon: repost non-hotfix reviewed patches in
damon/next tree" from is a sprinkle of unrelated minor bugfixes for
DAMON.
- The 3 patch series "mm: remove page_mapped()" from David Hildenbrand
remove this function from the tree, replacing it with folio_mapped().
- The 10 patch series "mm/damon: let DAMON be paused and resumed" from
SeongJae Park permits DAMON to be paused and resumed without losing its
current state.
- The 3 patch series "kasan: hw_tags: Disable tagging for stack and
page-tables" from Muhammad Usama Anjum simplifies and speeds up kasan by
removing its ineffective tagging of stacks and page tables.
- The 7 patch series "mm/damon/reclaim,lru_sort: monitor all system rams
by default" from SeongJae Park simplifies deployment on diverse hardware
like NUMA systems by updating DAMON_RECLAIM and DAMON_LRU_SORT to
automatically monitor the physical address range covering all System RAM
areas by default, replacing the overly restrictive behavior that only
targeted the single largest memory block to save on negligible overhead.
- The 2 patch series "mm/damon/sysfs: document filters/ directory as
deprecated" from SeongJae Park updates some DAMON docs.
- The 8 patch series "mm: use spinlock guards for zone lock" from Dmitry
Ilvokhin switches zone->lock handling over to using the guard()
mechanisms.
- The 2 patch series "mm/filemap: tighten mmap_miss hit accounting" from
fujunjie fixes a flaw where the mmap_miss counter over-credited page
cache hits during fault-arounds and page-fault retries. This results in
significant reduction of redundant synchronous mmap readahead I/O,
drastically cutting down execution time and gigabytes read for sparse
random or strided memory access workloads.
- The 2 patch series "selftests/cgroup: Fix false positive failures in
test_percpu_basic" from Li Wang fixes a couple of false-positives in the
cgroup kmem selftests.
- The 2 patch series "mm/damon/reclaim: support monitoring intervals
auto-tuning" from SeongJae Park adds a new parameter to DAMON permitting
DAMON_RECLAIM to automatically tune DAMON's sampling and aggregation
intervals.
- The 2 patch series "mm/damon/stat: add kdamond_pid parameter" from
SeongJae Park chnges DAMON_STAT to provide the pid of its kdamond.
- The 2 patch series "mm/kmemleak: dedupe verbose scan output" from
Breno Leitao removes large amounts of duplicated backtraces from the
verbose-mode kmemleak output.
- The 8 patch series "mm: remove CONFIG_HAVE_BOOTMEM_INFO_NODE (Part 1)"
from David Hildenbrand reduces our use of CONFIG_HAVE_BOOTMEM_INFO_NODE,
with a view to removing it entirely in a later series.
- The 2 patch series "mm/damon: validate min_region_size to be power of
2" from Liew Rui Yan prevents users from passing a non-power-of-2 value
of `addr_unit', as this later results in undesirable behavior.
- The 2 patch series "mm: document read_pages and simplify usage" from
Frederick Mayle does as claimed.
- The 3 patch series "tools/mm/page-types: Fix misc bugs" from Ye Liu
fixes three issues in tools/mm/page-types.c.
- The 4 patch series "mm: misc cleanups from __GFP_UNMAPPED series" from
Brendan Jackman implements several cleanups in the page allocator and
related code.
- The 12 patch series "mm, swap: swap table phase IV: unify allocation"
from Kairui Song unifies the allocation and charging of anon and shmem
swap in folios, provides better synchronization, consolidates the
metadata management, hence dropping the static array and map, and
improves performance.
- The 28 patch series "mm/damon: introduce data attributes monitoring"
from SeongJae Park extends DAMON for monitoring general data attributes
other than accesses.
- The 5 patch series "mm/vmalloc: free unused pages on vrealloc()
shrink" from Shivam Kalra implements the TODO in vrealloc() to unmap and
free unused pages when shrinking across a page boundary.
- The 3 patch series "mm/damon: documentation and comment fixes" from
niecheng does as advertised.
- The 3 patch series "remove mmap_action success, error hooks" from
Lorenzo Stoakes eliminates custom hooks from mmap_action by removing the
problematic success_hook which allowed drivers to improperly access
uninitialized VMAs. It replaces the error_hook with a simple error-code
field and updates the memory char driver accordingly.
- The 14 patch series "mm/damon: minor improvements for code readability
and tests" from SeongJae Park implements minor improvements in code
readability and tests for DAMON.
- The 2 patch series "mm/damon: fix macro arguments and clarify quota
goals doc" from Maksym Shcherba does those things.
- The 2 patch series "userfaultfd: merge fs/userfaultfd.c into
mm/userfaultfd.c" from Mike Rapoport performs that code movement.
- The 15 patch series "mm/mglru: improve reclaim loop and dirty folio"
from Kairui Song and others cleans up and slightly improves MGLRU's
reclaim loop and dirty writeback handling. Large performance
improvements are measured.
- The 3 patch series "use vma locks for proc/pid/{smaps|numa_maps}
reads" from Suren Baghdasaryan uses per-vma locks when reading
/proc/pid/smaps and /proc/pid/numa_maps similar to reduce contention on
central mmap_lock.
- The 2 patch series "refactors thpsize_shmem_enabled_store() and
thpsize_shmem_enabled_show()" from Ran Xiaokai provides some cleanup
work in the THP code.
- The 2 patch series "selftests/memfd: fix compilation warnings" from
Konstantin Khorenko fixes a few build glitches in the memfd selftest
code.
- The 4 patch series "memcg: shrink obj_stock_pcp and cache multiple
objcgs" from Shakeel Butt resolves a 68% performance regression caused
by NUMA-node cache thrashing around struct obj_stock_pcp by shrinking
its existing fields and expanding it into a multi-slot array that caches
up to five obj_cgroup pointers per CPU, allowing per-node variants of
the same memcg to coexist within a single 64-byte cache line.
- The 2 patch series "zram: writeback fixes" from Sergey Senozhatsky
addresses a couple of unrelated zram writeback issues.
- The 9 patch series "mm: switch THP shrinker to list_lru" from Johannes
Weiner resolves NUMA-awareness issues and streamlines callsite
interaction by refactoring and extending the list_lru API to completely
replace the complex, open-coded deferred split queue for Transparent
Huge Pages (THPs).
- The 2 patch series "mm: improve large folio readahead for exec memory"
from Usama Arif improves large-folio readahead on systems like 64K-page
arm64 by preventing the mmap_miss check from permanently disabling
target-oriented VM_EXEC readahead, and by generalizing the
force_thp_readahead gate to support mappings with any usefully large
maximum folio order under the cache cap.
- The 6 patch series "userfaultfd/pagemap: pre-existing fixes" from
Kiryl Shutsemau fixes a bunch of minor issues in the
userfaultfd/pagemap, all of which were flagged by Sashiko review of
proposed new material.
- The 5 patch series "mm/sparse-vmemmap: Provide generic
vmemmap_set_pmd() and vmemmap_check_pmd()" from Muchun Song provides
generic versions of these two functions so the four arch-specific
implementations can be removed.
- The 2 patch series "mm/swap, PM: hibernate: fix swapoff race in
uswsusp by pinning swap device" from Youngjun Park addresses a
uswsusp-vs-swapoff race and reduces the swap device reference
taking/releasing frequency.
- The 2 patch series "mm/hmm: A fix and a selftest" from Dev Jain does
as claimed.
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Merge tag 'mm-stable-2026-06-18-09-26' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm
Pull MM updates from Andrew Morton:
- "selftests/mm: clean up build output and verbosity" (Li Wang)
Remove some noise from the MM selftests build
- "mm: Free contiguous order-0 pages efficiently" (Ryan Roberts)
Speed up the freeing of a batch of 0-order pages by first scanning
them for coalescing opportunities. This is applicable to vfree() and
to the releasing of frozen pages
- "mm/damon: introduce DAMOS failed region quota charge ratio"
(SeongJae Park)
Address a DAMOS usability issue: The DAMOS quota often exhausts
prematurely because it charges for all memory attempted, causing slow
and inconsistent performance when actions fail on unreclaimable
memory.
To fix this, a new feature lets users set a smaller, flexible quota
charge ratio (via a numerator and denominator) for failed regions.
Since failed actions cause less overhead, reducing their quota cost
ensures more predictable and efficient DAMOS processing
- "selftests/cgroup: improve zswap tests robustness and support large
page sizes" (Li Wang)
Fix various spurious failures and improves the overall robustness of
the cgroup zswap selftests
- "fix MAP_DROPPABLE not supported errno" (Anthony Yznaga)
Fix an issue in the mlock selftests on arm32
- "mm: huge_memory: clean up defrag sysfs with shared" (Breno Leitao)
Some maintenance work in the huge_memory code
- "treewide: fixup gfp_t printks" (Brendan Jackman)
Use the special vprintf() gfp_t conversion in various places
- "mm: Fix vmemmap optimization accounting and initialization" (Muchun
Song)
Fix several bugs in the vmemmap optimization, mainly around incorrect
page accounting and memmap initialization in the DAX and memory
hotplug paths. It also fixes pageblock migratetype initialization and
struct page initialization for ZONE_DEVICE compound pages
- "mm/damon: repost non-hotfix reviewed patches in damon/next tree"
A sprinkle of unrelated minor bugfixes for DAMON
- "mm: remove page_mapped()" (David Hildenbrand)
Remove this function from the tree, replacing it with folio_mapped()
- "mm/damon: let DAMON be paused and resumed" (SeongJae Park)
Allow DAMON to be paused and resumed without losing its current state
- "kasan: hw_tags: Disable tagging for stack and page-tables" (Muhammad
Usama Anjum)
Simplify and speed up kasan by removing its ineffective tagging of
stacks and page tables
- "mm/damon/reclaim,lru_sort: monitor all system rams by default"
(SeongJae Park)
Simplify deployment on diverse hardware like NUMA systems by updating
DAMON_RECLAIM and DAMON_LRU_SORT to automatically monitor the
physical address range covering all System RAM areas by default,
replacing the overly restrictive behavior that only targeted the
single largest memory block to save on negligible overhead
- "mm/damon/sysfs: document filters/ directory as deprecated" (SeongJae
Park)
Update some DAMON docs
- "mm: use spinlock guards for zone lock" (Dmitry Ilvokhin)
Switch zone->lock handling over to using the guard() mechanisms
- "mm/filemap: tighten mmap_miss hit accounting" (fujunjie)
Fix a flaw where the mmap_miss counter over-credited page cache hits
during fault-arounds and page-fault retries. This results in
significant reduction of redundant synchronous mmap readahead I/O,
drastically cutting down execution time and gigabytes read for sparse
random or strided memory access workloads
- "selftests/cgroup: Fix false positive failures in test_percpu_basic"
(Li Wang)
Fix a couple of false-positives in the cgroup kmem selftests
- "mm/damon/reclaim: support monitoring intervals auto-tuning"
(SeongJae Park)
Add a new parameter to DAMON permitting DAMON_RECLAIM to
automatically tune DAMON's sampling and aggregation intervals
- "mm/damon/stat: add kdamond_pid parameter" (SeongJae Park)
Change DAMON_STAT to provide the pid of its kdamond
- "mm/kmemleak: dedupe verbose scan output" (Breno Leitao)
Remove large amounts of duplicated backtraces from the verbose-mode
kmemleak output
- "mm: remove CONFIG_HAVE_BOOTMEM_INFO_NODE (Part 1)" (David
Hildenbrand)
Reduce our use of CONFIG_HAVE_BOOTMEM_INFO_NODE, with a view to
removing it entirely in a later series
- "mm/damon: validate min_region_size to be power of 2" (Liew Rui Yan)
Prevent users from passing a non-power-of-2 value of `addr_unit', as
this later results in undesirable behavior
- "mm: document read_pages and simplify usage" (Frederick Mayle)
- "tools/mm/page-types: Fix misc bugs" (Ye Liu)
Fix three issues in tools/mm/page-types.c
- "mm: misc cleanups from __GFP_UNMAPPED series" (Brendan Jackman)
Implement several cleanups in the page allocator and related code
- "mm, swap: swap table phase IV: unify allocation" (Kairui Song)
Unify the allocation and charging of anon and shmem swap in folios,
provides better synchronization, consolidates the metadata
management, hence dropping the static array and map, and improves
performance
- "mm/damon: introduce data attributes monitoring" (SeongJae Park(
Extend DAMON to monitor general data attributes other than accesses
- "mm/vmalloc: free unused pages on vrealloc() shrink" (Shivam Kalra)
Implement the TODO in vrealloc() to unmap and free unused pages when
shrinking across a page boundary
- "mm/damon: documentation and comment fixes" (niecheng)
- "remove mmap_action success, error hooks" (Lorenzo Stoakes)
Eliminate custom hooks from mmap_action by removing the problematic
success_hook which allowed drivers to improperly access uninitialized
VMAs. It replaces the error_hook with a simple error-code field and
updates the memory char driver accordingly
- "mm/damon: minor improvements for code readability and tests"
(SeongJae Park)
- "mm/damon: fix macro arguments and clarify quota goals doc" (Maksym
Shcherba)
- "userfaultfd: merge fs/userfaultfd.c into mm/userfaultfd.c" (Mike
Rapoport)
- "mm/mglru: improve reclaim loop and dirty folio" (Kairui Song and
others)
Clean up and slightly improves MGLRU's reclaim loop and dirty
writeback handling. Large performance improvements are measured
- "use vma locks for proc/pid/{smaps|numa_maps} reads" (Suren
Baghdasaryan)
Use per-vma locks when reading /proc/pid/smaps and numa_maps similar
to reduce contention on central mmap_lock
- "refactors thpsize_shmem_enabled_store() and thpsize_shmem_enabled_show()"
(Ran Xiaokai)
Some cleanup work in the THP code
- "selftests/memfd: fix compilation warnings" (Konstantin Khorenko)
Fix a few build glitches in the memfd selftest code.
- "memcg: shrink obj_stock_pcp and cache multiple objcgs" (Shakeel
Butt)
Resolve a 68% performance regression caused by NUMA-node cache
thrashing around struct obj_stock_pcp by shrinking its existing
fields and expanding it into a multi-slot array that caches up to
five obj_cgroup pointers per CPU, allowing per-node variants of the
same memcg to coexist within a single 64-byte cache line.
- "zram: writeback fixes" (Sergey Senozhatsky)
address a couple of unrelated zram writeback issues
- "mm: switch THP shrinker to list_lru" (Johannes Weiner)
Resolve NUMA-awareness issues and streamlines callsite interaction by
refactoring and extending the list_lru API to completely replace the
complex, open-coded deferred split queue for Transparent Huge Pages
- "mm: improve large folio readahead for exec memory" (Usama Arif)
Improve large-folio readahead on systems like 64K-page arm64 by
preventing the mmap_miss check from permanently disabling
target-oriented VM_EXEC readahead, and by generalizing the
force_thp_readahead gate to support mappings with any usefully large
maximum folio order under the cache cap.
- "userfaultfd/pagemap: pre-existing fixes" (Kiryl Shutsemau)
Fix a bunch of minor issues in the userfaultfd/pagemap, all of which
were flagged by Sashiko review of proposed new material
- "mm/sparse-vmemmap: Provide generic vmemmap_set_pmd() and
vmemmap_check_pmd()" (Muchun Song)
Provide generic versions of these two functions so the four
arch-specific implementations can be removed.
- "mm/swap, PM: hibernate: fix swapoff race in uswsusp by pinning swap
device" (Youngjun Park)
Address a uswsusp-vs-swapoff race and reduces the swap device
reference taking/releasing frequency.
- "mm/hmm: A fix and a selftest" (Dev Jain)
* tag 'mm-stable-2026-06-18-09-26' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm: (321 commits)
selftests/mm/hmm-tests: test pagemap reads of PMD device-private entries
fs/proc/task_mmu: do not warn on seeing non-migration pmd entry
lib/test_hmm: check alloc_page_vma() return value and handle OOM
mm/compaction: cap compact_gap() at COMPACT_CLUSTER_MAX
mm/swap: remove redundant swap device reference in alloc/free
mm/swap, PM: hibernate: fix swapoff race in uswsusp by pinning swap device
mm/filemap: use folio_next_index() for start
vmalloc: fix NULL pointer dereference in is_vm_area_hugepages()
sparc/mm: drop vmemmap_check_pmd helper and use generic code
loongarch/mm: drop vmemmap_check_pmd helper and use generic code
riscv/mm: drop vmemmap_pmd helpers and use generic code
arm64/mm: drop vmemmap_pmd helpers and use generic code
mm/sparse-vmemmap: provide generic vmemmap_set_pmd() and vmemmap_check_pmd()
rust: page: mark Page::nid as inline
userfaultfd: build __VMA_UFFD_FLAGS from config-gated masks
userfaultfd: gate must_wait writability check on pte_present()
mm/huge_memory: preserve pmd_swp_uffd_wp on device-private PMD downgrade
fs/proc/task_mmu: fix hugetlb self-deadlock in pagemap_scan_pte_hole()
fs/proc/task_mmu: use huge_page_size() in pagemap_scan_hugetlb_entry()
fs/proc/task_mmu: fix make_uffd_wp_huge_pte() prot-update race
...
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||
|
Yichong Chen
|
892a786473 |
tools/mm/slabinfo: fix total_objects attribute name
SLUB exports the total_objects sysfs attribute, but slabinfo tries to read
objects_total. As a result, the lookup fails and the field remains zero.
Use the correct attribute name and rename the corresponding structure
member to match.
Fixes:
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||
|
Ye Liu
|
3fb355431e |
tools/mm/page-types: fix kpageflags option argument in getopt_long
The --kpageflags option requires an argument to specify the kpageflags file path, but has_arg was set to 0 (no_argument) in the long options table. Change it to 1 (required_argument) so getopt_long correctly parses the argument. Link: https://lore.kernel.org/20260513022120.58033-4-ye.liu@linux.dev Signed-off-by: Ye Liu <liuye@kylinos.cn> Acked-by: David Hildenbrand (Arm) <david@kernel.org> Reviewed-by: SeongJae Park <sj@kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> |
||
|
Ye Liu
|
e696ff06db |
tools/mm/page-types: fix ternary operator precedence in sigbus handler
The ternary operator (?:) has lower precedence than addition (+), so the expression `off + sigbus_addr ? sigbus_addr - ptr : 0` was parsed as `(off + sigbus_addr) ? (sigbus_addr - ptr) : 0` rather than the intended `off + (sigbus_addr ? sigbus_addr - ptr : 0)`. Add explicit parentheses to ensure the correct evaluation order. Link: https://lore.kernel.org/20260513022120.58033-3-ye.liu@linux.dev Signed-off-by: Ye Liu <liuye@kylinos.cn> Acked-by: SeongJae Park <sj@kernel.org> Cc: David Hildenbrand (Arm) <david@kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> |
||
|
Ye Liu
|
96f9fb9212 |
tools/mm/page-types: fix typo in madvise() error message
Patch series "tools/mm/page-types: Fix misc bugs".
This series fixes three issues in tools/mm/page-types.c:
1. Fix two typos in madvise() error messages ("madvice" -> "madvise")
2. Fix operator precedence bug in the sigbus handler where the ternary
operator binds looser than addition, producing incorrect offset
calculation when sigbus_addr is non-NULL
3. Fix --kpageflags option declaration in getopt_long: has_arg should
be 1 (required_argument) since the option requires a file path
This patch (of 3):
Two error messages incorrectly spelled the madvise() function name as
"madvice". Fix the typo in both occurrences.
Link: https://lore.kernel.org/20260513022120.58033-1-ye.liu@linux.dev
Link: https://lore.kernel.org/20260513022120.58033-2-ye.liu@linux.dev
Signed-off-by: Ye Liu <liuye@kylinos.cn>
Acked-by: David Hildenbrand (Arm) <david@kernel.org>
Reviewed-by: SeongJae Park <sj@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
|
||
|
Xuewen Wang
|
2b685ac24a |
tools/mm/slabinfo: remove redundant slab->partial assignment
slab->partial is assigned by get_obj("partial") and then immediately
overwritten by get_obj_and_str("partial", &t). Remove the first
redundant assignment.
Reviewed-by: SeongJae Park <sj@kernel.org>
Signed-off-by: Xuewen Wang <wangxuewen@kylinos.cn>
Link: https://patch.msgid.link/20260518062159.80664-4-wangxuewen@kylinos.cn
Signed-off-by: Vlastimil Babka (SUSE) <vbabka@kernel.org>
|
||
|
Xuewen Wang
|
76c2db064b |
tools/mm/slabinfo: remove dead assignment in get_obj_and_str()
The assignment `x = NULL` sets the local parameter variable instead of `*x`, which is a no-op since `*x` was already set to NULL on the line above. Remove the dead assignment. Signed-off-by: Xuewen Wang <wangxuewen@kylinos.cn> Reviewed-by: SeongJae Park <sj@kernel.org> Link: https://patch.msgid.link/20260518062159.80664-3-wangxuewen@kylinos.cn Signed-off-by: Vlastimil Babka (SUSE) <vbabka@kernel.org> |
||
|
Xuewen Wang
|
235ab68d67 |
tools/mm/slabinfo: Fix trace disable logic inversion
The disable trace path in slab_debug() had a logic error where it would
set trace=1 instead of trace=0. This made trace functionality permanently
enabled once turned on for any slab cache.
Fixes:
|
||
|
Kaushlendra Kumar
|
8b8017d7c4 |
tools/mm/slabinfo: fix --partial long option mapping
The long option "--partial" was incorrectly mapped to lowercase 'p' in the opts[] array, but the getopt string and switch case handle uppercase 'P'. This mismatch caused --partial to be rejected. Fix the long_options mapping to use 'P' so --partial works correctly alongside the existing -P short option. Link: https://lkml.kernel.org/r/20251208105240.2719773-1-kaushlendra.kumar@intel.com Signed-off-by: Kaushlendra Kumar <kaushlendra.kumar@intel.com> Reviewed-by: SeongJae Park <sj@kernel.org> Tested-by: SeongJae Park <sj@kernel.org> Cc: Vlastimil Babka <vbabka@suse.cz> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> |
||
|
Kaushlendra Kumar
|
9f5edd785d |
tools/mm/thp_swap_allocator_test: fix small folio alignment
Use ALIGNMENT_SMALLFOLIO instead of ALIGNMENT_MTHP when allocating small folios to ensure correct memory alignment for the test case. Before: test allocates small folios with 64KB alignment (ALIGNMENT_MTHP) when only 4KB alignment (ALIGNMENT_SMALLFOLIO) is needed. This wastes address space and may cause allocation failures on systems with fragmented memory. Worst-case impact: this only affects thp_swap_allocator_test tool behavior. Link: https://lkml.kernel.org/r/20251209031745.2723120-1-kaushlendra.kumar@intel.com Signed-off-by: Kaushlendra Kumar <kaushlendra.kumar@intel.com> Reviewed-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> |
||
|
Kaushlendra Kumar
|
7013803444 |
tools/mm/page_owner_sort: fix timestamp comparison for stable sorting
The ternary operator in compare_ts() returns 1 when timestamps are equal,
causing unstable sorting behavior. Replace with explicit three-way
comparison that returns 0 for equal timestamps, ensuring stable qsort
ordering and consistent output.
Link: https://lkml.kernel.org/r/20251209044552.3396468-1-kaushlendra.kumar@intel.com
Fixes:
|
||
|
Ye Liu
|
5bf65d4a8d |
tools/mm/page_owner_sort: add help option support
Add -h/--help option to display usage information and improve code style. Link: https://lkml.kernel.org/r/20251016054927.138510-1-ye.liu@linux.dev Signed-off-by: Ye Liu <liuye@kylinos.cn> Cc: SeongJae Park <sj@kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> |
||
|
Ye Liu
|
2f79ddb64b |
tools/mm: use <stdbool.h> in page_owner_sort.c
Use standard <stdbool.h> instead of manually defining bool, true and false. Link: https://lkml.kernel.org/r/20251015093851.109663-1-ye.liu@linux.dev Signed-off-by: Ye Liu <liuye@kylinos.cn> Reviewed-by: Dev Jain <dev.jain@arm.com> Reviewed-by: SeongJae Park <sj@kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> |
||
|
Kaushlendra Kumar
|
4fa5b88e77 |
tools/mm/slabinfo: fix access to null terminator in string boundary
The current code incorrectly accesses buffer[strlen(buffer)], which points
to the null terminator ('\0') at the end of the string. This is
technically out-of-bounds access since valid string content ends at index
strlen(buffer)-1.
Fix by:
1. Declaring strlen() result variable at function scope
2. Adding bounds check (len > 0) to handle empty strings
3. Using buffer[len-1] to correctly access the last character before
the null terminator
[kaushlendra.kumar@intel.com: remove unnecessary blank line]
Link: https://lkml.kernel.org/r/20250901044955.3902815-1-kaushlendra.kumar@intel.com
Link: https://lkml.kernel.org/r/20250830172022.1927448-1-kaushlendra.kumar@intel.com
Signed-off-by: Kaushlendra Kumar <kaushlendra.kumar@intel.com>
Acked-by: SeongJae Park <sj@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
|
||
|
Ye Liu
|
fee8870a09 |
tools/mm: add script to display page state for a given PID and VADDR
Introduces a new drgn script, `show_page_info.py`, which allows users
to analyze the state of a page given a process ID (PID) and a virtual
address (VADDR). This can help kernel developers or debuggers easily
inspect page-related information in a live kernel or vmcore.
The script extracts information such as the page flags, mapping, and
other metadata relevant to diagnosing memory issues.
Output example:
sudo ./show_page_info.py 1 0x7fc988181000
PID: 1 Comm: systemd mm: 0xffff8d22c4089700
RAW: 0017ffffc000416c fffff939062ff708 fffff939062ffe08 ffff8d23062a12a8
RAW: 0000000000000000 ffff8d2323438f60 0000002500000007 ffff8d23203ff500
Page Address: 0xfffff93905664e00
Page Flags: PG_referenced|PG_uptodate|PG_lru|PG_head|PG_active|
PG_private|PG_reported|PG_has_hwpoisoned
Page Size: 4096
Page PFN: 0x159938
Page Physical: 0x159938000
Page Virtual: 0xffff8d2319938000
Page Refcount: 37
Page Mapcount: 7
Page Index: 0x0
Page Memcg Data: 0xffff8d23203ff500
Memcg Name: init.scope
Memcg Path: /sys/fs/cgroup/memory/init.scope
Page Mapping: 0xffff8d23062a12a8
Page Anon/File: File
Page VMA: 0xffff8d22e06e0e40
VMA Start: 0x7fc988181000
VMA End: 0x7fc988185000
This page is part of a compound page.
This page is the head page of a compound page.
Head Page: 0xfffff93905664e00
Compound Order: 2
Number of Pages: 4
Link: https://lkml.kernel.org/r/20250530055855.687067-1-ye.liu@linux.dev
Signed-off-by: Ye Liu <liuye@kylinos.cn>
Tested-by: SeongJae Park <sj@kernel.org>
Reviewed-by: Stephen Brennan <stephen.s.brennan@oracle.com>
Cc: Florian Weimer <fweimer@redhat.com>
Cc: Omar Sandoval <osandov@osandov.com>
Cc: "Paul E . McKenney" <paulmck@kernel.org>
Cc: Sweet Tea Dorminy <sweettea-kernel@dorminy.me>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
|
||
|
Florian Fainelli
|
035d3c7787 |
tools/mm: fix build warnings with musl-libc
musl-libc warns about the following:
/home/florian/dev/buildroot/output/arm64/rpi4-b/host/aarch64-buildroot-linux-musl/sysroot/usr/include/sys/errno.h:1:2: attention: #warning redirecting incorrect #include <sys/errno.h> to <errno.h> [-Wcpp]
1 | #warning redirecting incorrect #include <sys/errno.h> to <errno.h>
| ^~~~~~~
/home/florian/dev/buildroot/output/arm64/rpi4-b/host/aarch64-buildroot-linux-musl/sysroot/usr/include/sys/fcntl.h:1:2: attention: #warning redirecting incorrect #include <sys/fcntl.h> to <fcntl.h> [-Wcpp]
1 | #warning redirecting incorrect #include <sys/fcntl.h> to <fcntl.h>
| ^~~~~~~
include errno.h and fcntl.h directly.
Link: https://lkml.kernel.org/r/20250210200518.1137295-1-florian.fainelli@broadcom.com
Signed-off-by: Florian Fainelli <florian.fainelli@broadcom.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
|
||
|
Linus Torvalds
|
5c00ff742b |
- The series "zram: optimal post-processing target selection" from
Sergey Senozhatsky improves zram's post-processing selection algorithm.
This leads to improved memory savings.
- Wei Yang has gone to town on the mapletree code, contributing several
series which clean up the implementation:
- "refine mas_mab_cp()"
- "Reduce the space to be cleared for maple_big_node"
- "maple_tree: simplify mas_push_node()"
- "Following cleanup after introduce mas_wr_store_type()"
- "refine storing null"
- The series "selftests/mm: hugetlb_fault_after_madv improvements" from
David Hildenbrand fixes this selftest for s390.
- The series "introduce pte_offset_map_{ro|rw}_nolock()" from Qi Zheng
implements some rationaizations and cleanups in the page mapping code.
- The series "mm: optimize shadow entries removal" from Shakeel Butt
optimizes the file truncation code by speeding up the handling of shadow
entries.
- The series "Remove PageKsm()" from Matthew Wilcox completes the
migration of this flag over to being a folio-based flag.
- The series "Unify hugetlb into arch_get_unmapped_area functions" from
Oscar Salvador implements a bunch of consolidations and cleanups in the
hugetlb code.
- The series "Do not shatter hugezeropage on wp-fault" from Dev Jain
takes away the wp-fault time practice of turning a huge zero page into
small pages. Instead we replace the whole thing with a THP. More
consistent cleaner and potentiall saves a large number of pagefaults.
- The series "percpu: Add a test case and fix for clang" from Andy
Shevchenko enhances and fixes the kernel's built in percpu test code.
- The series "mm/mremap: Remove extra vma tree walk" from Liam Howlett
optimizes mremap() by avoiding doing things which we didn't need to do.
- The series "Improve the tmpfs large folio read performance" from
Baolin Wang teaches tmpfs to copy data into userspace at the folio size
rather than as individual pages. A 20% speedup was observed.
- The series "mm/damon/vaddr: Fix issue in
damon_va_evenly_split_region()" fro Zheng Yejian fixes DAMON splitting.
- The series "memcg-v1: fully deprecate charge moving" from Shakeel Butt
removes the long-deprecated memcgv2 charge moving feature.
- The series "fix error handling in mmap_region() and refactor" from
Lorenzo Stoakes cleanup up some of the mmap() error handling and
addresses some potential performance issues.
- The series "x86/module: use large ROX pages for text allocations" from
Mike Rapoport teaches x86 to use large pages for read-only-execute
module text.
- The series "page allocation tag compression" from Suren Baghdasaryan
is followon maintenance work for the new page allocation profiling
feature.
- The series "page->index removals in mm" from Matthew Wilcox remove
most references to page->index in mm/. A slow march towards shrinking
struct page.
- The series "damon/{self,kunit}tests: minor fixups for DAMON debugfs
interface tests" from Andrew Paniakin performs maintenance work for
DAMON's self testing code.
- The series "mm: zswap swap-out of large folios" from Kanchana Sridhar
improves zswap's batching of compression and decompression. It is a
step along the way towards using Intel IAA hardware acceleration for
this zswap operation.
- The series "kasan: migrate the last module test to kunit" from
Sabyrzhan Tasbolatov completes the migration of the KASAN built-in tests
over to the KUnit framework.
- The series "implement lightweight guard pages" from Lorenzo Stoakes
permits userapace to place fault-generating guard pages within a single
VMA, rather than requiring that multiple VMAs be created for this.
Improved efficiencies for userspace memory allocators are expected.
- The series "memcg: tracepoint for flushing stats" from JP Kobryn uses
tracepoints to provide increased visibility into memcg stats flushing
activity.
- The series "zram: IDLE flag handling fixes" from Sergey Senozhatsky
fixes a zram buglet which potentially affected performance.
- The series "mm: add more kernel parameters to control mTHP" from
Maíra Canal enhances our ability to control/configuremultisize THP from
the kernel boot command line.
- The series "kasan: few improvements on kunit tests" from Sabyrzhan
Tasbolatov has a couple of fixups for the KASAN KUnit tests.
- The series "mm/list_lru: Split list_lru lock into per-cgroup scope"
from Kairui Song optimizes list_lru memory utilization when lockdep is
enabled.
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Merge tag 'mm-stable-2024-11-18-19-27' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm
Pull MM updates from Andrew Morton:
- The series "zram: optimal post-processing target selection" from
Sergey Senozhatsky improves zram's post-processing selection
algorithm. This leads to improved memory savings.
- Wei Yang has gone to town on the mapletree code, contributing several
series which clean up the implementation:
- "refine mas_mab_cp()"
- "Reduce the space to be cleared for maple_big_node"
- "maple_tree: simplify mas_push_node()"
- "Following cleanup after introduce mas_wr_store_type()"
- "refine storing null"
- The series "selftests/mm: hugetlb_fault_after_madv improvements" from
David Hildenbrand fixes this selftest for s390.
- The series "introduce pte_offset_map_{ro|rw}_nolock()" from Qi Zheng
implements some rationaizations and cleanups in the page mapping
code.
- The series "mm: optimize shadow entries removal" from Shakeel Butt
optimizes the file truncation code by speeding up the handling of
shadow entries.
- The series "Remove PageKsm()" from Matthew Wilcox completes the
migration of this flag over to being a folio-based flag.
- The series "Unify hugetlb into arch_get_unmapped_area functions" from
Oscar Salvador implements a bunch of consolidations and cleanups in
the hugetlb code.
- The series "Do not shatter hugezeropage on wp-fault" from Dev Jain
takes away the wp-fault time practice of turning a huge zero page
into small pages. Instead we replace the whole thing with a THP. More
consistent cleaner and potentiall saves a large number of pagefaults.
- The series "percpu: Add a test case and fix for clang" from Andy
Shevchenko enhances and fixes the kernel's built in percpu test code.
- The series "mm/mremap: Remove extra vma tree walk" from Liam Howlett
optimizes mremap() by avoiding doing things which we didn't need to
do.
- The series "Improve the tmpfs large folio read performance" from
Baolin Wang teaches tmpfs to copy data into userspace at the folio
size rather than as individual pages. A 20% speedup was observed.
- The series "mm/damon/vaddr: Fix issue in
damon_va_evenly_split_region()" fro Zheng Yejian fixes DAMON
splitting.
- The series "memcg-v1: fully deprecate charge moving" from Shakeel
Butt removes the long-deprecated memcgv2 charge moving feature.
- The series "fix error handling in mmap_region() and refactor" from
Lorenzo Stoakes cleanup up some of the mmap() error handling and
addresses some potential performance issues.
- The series "x86/module: use large ROX pages for text allocations"
from Mike Rapoport teaches x86 to use large pages for
read-only-execute module text.
- The series "page allocation tag compression" from Suren Baghdasaryan
is followon maintenance work for the new page allocation profiling
feature.
- The series "page->index removals in mm" from Matthew Wilcox remove
most references to page->index in mm/. A slow march towards shrinking
struct page.
- The series "damon/{self,kunit}tests: minor fixups for DAMON debugfs
interface tests" from Andrew Paniakin performs maintenance work for
DAMON's self testing code.
- The series "mm: zswap swap-out of large folios" from Kanchana Sridhar
improves zswap's batching of compression and decompression. It is a
step along the way towards using Intel IAA hardware acceleration for
this zswap operation.
- The series "kasan: migrate the last module test to kunit" from
Sabyrzhan Tasbolatov completes the migration of the KASAN built-in
tests over to the KUnit framework.
- The series "implement lightweight guard pages" from Lorenzo Stoakes
permits userapace to place fault-generating guard pages within a
single VMA, rather than requiring that multiple VMAs be created for
this. Improved efficiencies for userspace memory allocators are
expected.
- The series "memcg: tracepoint for flushing stats" from JP Kobryn uses
tracepoints to provide increased visibility into memcg stats flushing
activity.
- The series "zram: IDLE flag handling fixes" from Sergey Senozhatsky
fixes a zram buglet which potentially affected performance.
- The series "mm: add more kernel parameters to control mTHP" from
Maíra Canal enhances our ability to control/configuremultisize THP
from the kernel boot command line.
- The series "kasan: few improvements on kunit tests" from Sabyrzhan
Tasbolatov has a couple of fixups for the KASAN KUnit tests.
- The series "mm/list_lru: Split list_lru lock into per-cgroup scope"
from Kairui Song optimizes list_lru memory utilization when lockdep
is enabled.
* tag 'mm-stable-2024-11-18-19-27' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm: (215 commits)
cma: enforce non-zero pageblock_order during cma_init_reserved_mem()
mm/kfence: add a new kunit test test_use_after_free_read_nofault()
zram: fix NULL pointer in comp_algorithm_show()
memcg/hugetlb: add hugeTLB counters to memcg
vmstat: call fold_vm_zone_numa_events() before show per zone NUMA event
mm: mmap_lock: check trace_mmap_lock_$type_enabled() instead of regcount
zram: ZRAM_DEF_COMP should depend on ZRAM
MAINTAINERS/MEMORY MANAGEMENT: add document files for mm
Docs/mm/damon: recommend academic papers to read and/or cite
mm: define general function pXd_init()
kmemleak: iommu/iova: fix transient kmemleak false positive
mm/list_lru: simplify the list_lru walk callback function
mm/list_lru: split the lock to per-cgroup scope
mm/list_lru: simplify reparenting and initial allocation
mm/list_lru: code clean up for reparenting
mm/list_lru: don't export list_lru_add
mm/list_lru: don't pass unnecessary key parameters
kasan: add kunit tests for kmalloc_track_caller, kmalloc_node_track_caller
kasan: change kasan_atomics kunit test as KUNIT_CASE_SLOW
kasan: use EXPORT_SYMBOL_IF_KUNIT to export symbols
...
|
||
|
Motiejus JakÅ`tys
|
a39326767c |
tools/mm: fix compile error
Add a missing semicolon.
Link: https://lkml.kernel.org/r/20241112171655.1662670-1-motiejus@jakstys.lt
Fixes:
|
||
|
Marc Dionne
|
e3d37a6f62 |
tools/mm: fix slabinfo crash when MAX_SLABS is exceeded
The number of slabs can easily exceed the hard coded MAX_SLABS in the slabinfo tool, causing it to overwrite memory and crash. Increase the value of MAX_SLABS, and check if that has been exceeded for each new slab, instead of at the end when it's already too late. Also move the check for MAX_ALIASES into the loop body. Link: https://lkml.kernel.org/r/20241031105534.565533-1-marc.c.dionne@gmail.com Signed-off-by: Marc Dionne <marc.dionne@auristor.com> Acked-by: Vlastimil Babka <vbabka@suse.cz> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> |
||
|
Liu Jing
|
3f1f947a32 |
tools/mm: free the allocated memory
The comm_str memory needs to be freed if the search_pattern function call fails in get_comm [akpm@linux-foundation.org: fix whitespace] Link: https://lkml.kernel.org/r/20241022012526.7597-1-liujing@cmss.chinamobile.com Signed-off-by: Liu Jing <liujing@cmss.chinamobile.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> |
||
|
Wladislav Wiebe
|
ece5897e5a |
tools/mm: -Werror fixes in page-types/slabinfo
Commit |
||
|
Linus Torvalds
|
7856a56541 |
Many singleton patches - please see the various changelogs for details.
Quite a lot of nilfs2 work this time around.
Notable patch series in this pull request are:
"mul_u64_u64_div_u64: new implementation" by Nicolas Pitre, with
assistance from Uwe Kleine-König. Reimplement mul_u64_u64_div_u64() to
provide (much) more accurate results. The current implementation was
causing Uwe some issues in the PWM drivers.
"xz: Updates to license, filters, and compression options" from Lasse
Collin. Miscellaneous maintenance and kinor feature work to the xz
decompressor.
"Fix some GDB command error and add some GDB commands" from Kuan-Ying Lee.
Fixes and enhancements to the gdb scripts.
"treewide: add missing MODULE_DESCRIPTION() macros" from Jeff Johnson.
Adds lots of MODULE_DESCRIPTIONs, thus fixing lots of warnings about this.
"nilfs2: add support for some common ioctls" from Ryusuke Konishi. Adds
various commonly-available ioctls to nilfs2.
"This series fixes a number of formatting issues in kernel doc comments"
from Ryusuke Konishi does that.
"nilfs2: prevent unexpected ENOENT propagation" from Ryusuke Konishi. Fix
issues where -ENOENT was being unintentionally and inappropriately
returned to userspace.
"nilfs2: assorted cleanups" from Huang Xiaojia.
"nilfs2: fix potential issues with empty b-tree nodes" from Ryusuke
Konishi fixes some issues which can occur on corrupted nilfs2 filesystems.
"scripts/decode_stacktrace.sh: improve error reporting and usability" from
Luca Ceresoli does those things.
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Merge tag 'mm-nonmm-stable-2024-09-21-07-52' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm
Pull non-MM updates from Andrew Morton:
"Many singleton patches - please see the various changelogs for
details.
Quite a lot of nilfs2 work this time around.
Notable patch series in this pull request are:
- "mul_u64_u64_div_u64: new implementation" by Nicolas Pitre, with
assistance from Uwe Kleine-König. Reimplement mul_u64_u64_div_u64()
to provide (much) more accurate results. The current implementation
was causing Uwe some issues in the PWM drivers.
- "xz: Updates to license, filters, and compression options" from
Lasse Collin. Miscellaneous maintenance and kinor feature work to
the xz decompressor.
- "Fix some GDB command error and add some GDB commands" from
Kuan-Ying Lee. Fixes and enhancements to the gdb scripts.
- "treewide: add missing MODULE_DESCRIPTION() macros" from Jeff
Johnson. Adds lots of MODULE_DESCRIPTIONs, thus fixing lots of
warnings about this.
- "nilfs2: add support for some common ioctls" from Ryusuke Konishi.
Adds various commonly-available ioctls to nilfs2.
- "This series fixes a number of formatting issues in kernel doc
comments" from Ryusuke Konishi does that.
- "nilfs2: prevent unexpected ENOENT propagation" from Ryusuke
Konishi. Fix issues where -ENOENT was being unintentionally and
inappropriately returned to userspace.
- "nilfs2: assorted cleanups" from Huang Xiaojia.
- "nilfs2: fix potential issues with empty b-tree nodes" from Ryusuke
Konishi fixes some issues which can occur on corrupted nilfs2
filesystems.
- "scripts/decode_stacktrace.sh: improve error reporting and
usability" from Luca Ceresoli does those things"
* tag 'mm-nonmm-stable-2024-09-21-07-52' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm: (103 commits)
list: test: increase coverage of list_test_list_replace*()
list: test: fix tests for list_cut_position()
proc: use __auto_type more
treewide: correct the typo 'retun'
ocfs2: cleanup return value and mlog in ocfs2_global_read_info()
nilfs2: remove duplicate 'unlikely()' usage
nilfs2: fix potential oob read in nilfs_btree_check_delete()
nilfs2: determine empty node blocks as corrupted
nilfs2: fix potential null-ptr-deref in nilfs_btree_insert()
user_namespace: use kmemdup_array() instead of kmemdup() for multiple allocation
tools/mm: rm thp_swap_allocator_test when make clean
squashfs: fix percpu address space issues in decompressor_multi_percpu.c
lib: glob.c: added null check for character class
nilfs2: refactor nilfs_segctor_thread()
nilfs2: use kthread_create and kthread_stop for the log writer thread
nilfs2: remove sc_timer_task
nilfs2: do not repair reserved inode bitmap in nilfs_new_inode()
nilfs2: eliminate the shared counter and spinlock for i_generation
nilfs2: separate inode type information from i_state field
nilfs2: use the BITS_PER_LONG macro
...
|
||
|
zhangjiao
|
0aa75a2b3f |
tools/mm: rm thp_swap_allocator_test when make clean
rm thp_swap_allocator_test when make clean Link: https://lkml.kernel.org/r/20240829042008.6937-1-zhangjiao2@cmss.chinamobile.com Signed-off-by: zhangjiao <zhangjiao2@cmss.chinamobile.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> |
||
|
Matthew Wilcox (Oracle)
|
7a87225ae2 |
x86: remove PG_uncached
Convert x86 to use PG_arch_2 instead of PG_uncached and remove PG_uncached. Link: https://lkml.kernel.org/r/20240821193445.2294269-11-willy@infradead.org Signed-off-by: Matthew Wilcox (Oracle) <willy@infradead.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> |
||
|
Matthew Wilcox (Oracle)
|
02e1960aaf |
mm: rename PG_mappedtodisk to PG_owner_2
This flag has similar constraints to PG_owner_priv_1 -- it is ignored by core code, and is entirely for the use of the code which allocated the folio. Since the pagecache does not use it, individual filesystems can use it. The bufferhead code does use it, so filesystems which use the buffer cache must not use it for another purpose. Link: https://lkml.kernel.org/r/20240821193445.2294269-10-willy@infradead.org Signed-off-by: Matthew Wilcox (Oracle) <willy@infradead.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> |
||
|
Barry Song
|
95139d9408 |
tools/mm: introduce a tool to assess swap entry allocation for thp_swapout
Both Ryan and Chris have been utilizing the small test program to aid in debugging and identifying issues with swap entry allocation. While a real or intricate workload might be more suitable for assessing the correctness and effectiveness of the swap allocation policy, a small test program presents a simpler means of understanding the problem and initially verifying the improvements being made. Let's endeavor to integrate it into tools/mm. Although it presently only accommodates 64KB and 4KB, I'm optimistic that we can expand its capabilities to support multiple sizes and simulate more complex systems in the future as required. Basically, we have 1. Use MADV_PAGEPUT for rapid swap-out, putting the swap allocation code under high exercise in a short time. 2. Use MADV_DONTNEED to simulate the behavior of libc and Java heap in freeing memory, as well as for munmap, app exits, or OOM killer scenarios. This ensures new mTHP is always generated, released or swapped out, similar to the behavior on a PC or Android phone where many applications are frequently started and terminated. 3. Swap in with or without the "-a" option to observe how fragments due to swap-in and the incoming swap-in of large folios will impact swap-out fallback. Due to 2, we ensure a certain proportion of mTHP. Similarly, because of 3, we maintain a certain proportion of small folios, as we don't support large folios swap-in, meaning any swap-in will immediately result in small folios. Therefore, with both 2 and 3, we automatically achieve a system containing both mTHP and small folios. Additionally, 1 provides the ability to continuously swap them out. We can also use "-s" to add a dedicated small folios memory area. [akpm@linux-foundation.org: thp_swap_allocator_test.c needs mman.h, per Kairui Song] Link: https://lkml.kernel.org/r/20240622071231.576056-2-21cnbao@gmail.com Signed-off-by: Barry Song <v-songbaohua@oppo.com> Acked-by: Chris Li <chrisl@kernel.org> Tested-by: Chris Li <chrisl@kernel.org> Reviewed-by: Ryan Roberts <ryan.roberts@arm.com> Tested-by: Ryan Roberts <ryan.roberts@arm.com> Cc: David Hildenbrand <david@redhat.com> Cc: "Huang, Ying" <ying.huang@intel.com> Cc: Hugh Dickins <hughd@google.com> Cc: Kairui Song <kasong@tencent.com> Cc: Kalesh Singh <kaleshsingh@google.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> |
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Ryan Roberts
|
2444172cfd |
tools/mm: add thpmaps script to dump THP usage info
With the proliferation of large folios for file-backed memory, and more
recently the introduction of multi-size THP for anonymous memory, it is
becoming useful to be able to see exactly how large folios are mapped into
processes. For some architectures (e.g. arm64), if most memory is mapped
using contpte-sized and -aligned blocks, TLB usage can be optimized so
it's useful to see where these requirements are and are not being met.
thpmaps is a Python utility that reads /proc/<pid>/smaps,
/proc/<pid>/pagemap and /proc/kpageflags to print information about how
transparent huge pages (both file and anon) are mapped to a specified
process or cgroup. It aims to help users debug and optimize their
workloads. In future we may wish to introduce stats directly into the
kernel (e.g. smaps or similar), but for now this provides a short term
solution without the need to introduce any new ABI.
Run with help option for a full listing of the arguments:
# ./thpmaps --help
--8<--
usage: thpmaps [-h] [--pid pid | --cgroup path] [--rollup]
[--cont size[KMG]] [--inc-smaps] [--inc-empty]
[--periodic sleep_ms]
Prints information about how transparent huge pages are mapped, either
system-wide, or for a specified process or cgroup.
When run with --pid, the user explicitly specifies the set of pids to
scan. e.g. "--pid 10 [--pid 134 ...]". When run with --cgroup, the user
passes either a v1 or v2 cgroup and all pids that belong to the cgroup
subtree are scanned. When run with neither --pid nor --cgroup, the full
set of pids on the system is gathered from /proc and scanned as if the
user had provided "--pid 1 --pid 2 ...".
A default set of statistics is always generated for THP mappings.
However, it is also possible to generate additional statistics for
"contiguous block mappings" where the block size is user-defined.
Statistics are maintained independently for anonymous and file-backed
(pagecache) memory and are shown both in kB and as a percentage of either
total anonymous or total file-backed memory as appropriate.
THP Statistics
--------------
Statistics are always generated for fully- and contiguously-mapped THPs
whose mapping address is aligned to their size, for each <size> supported
by the system. Separate counters describe THPs mapped by PTE vs those
mapped by PMD. (Although note a THP can only be mapped by PMD if it is
PMD-sized):
- anon-thp-pte-aligned-<size>kB
- file-thp-pte-aligned-<size>kB
- anon-thp-pmd-aligned-<size>kB
- file-thp-pmd-aligned-<size>kB
Similarly, statistics are always generated for fully- and contiguously-
mapped THPs whose mapping address is *not* aligned to their size, for each
<size> supported by the system. Due to the unaligned mapping, it is
impossible to map by PMD, so there are only PTE counters for this case:
- anon-thp-pte-unaligned-<size>kB
- file-thp-pte-unaligned-<size>kB
Statistics are also always generated for mapped pages that belong to a THP
but where the is THP is *not* fully- and contiguously- mapped. These
"partial" mappings are all counted in the same counter regardless of the
size of the THP that is partially mapped:
- anon-thp-pte-partial
- file-thp-pte-partial
Contiguous Block Statistics
---------------------------
An optional, additional set of statistics is generated for every
contiguous block size specified with `--cont <size>`. These statistics
show how much memory is mapped in contiguous blocks of <size> and also
aligned to <size>. A given contiguous block must all belong to the same
THP, but there is no requirement for it to be the *whole* THP. Separate
counters describe contiguous blocks mapped by PTE vs those mapped by PMD:
- anon-cont-pte-aligned-<size>kB
- file-cont-pte-aligned-<size>kB
- anon-cont-pmd-aligned-<size>kB
- file-cont-pmd-aligned-<size>kB
As an example, if monitoring 64K contiguous blocks (--cont 64K), there are
a number of sources that could provide such blocks: a fully- and
contiguously-mapped 64K THP that is aligned to a 64K boundary would
provide 1 block. A fully- and contiguously-mapped 128K THP that is
aligned to at least a 64K boundary would provide 2 blocks. Or a 128K THP
that maps its first 100K, but contiguously and starting at a 64K boundary
would provide 1 block. A fully- and contiguously-mapped 2M THP would
provide 32 blocks. There are many other possible permutations.
options:
-h, --help show this help message and exit
--pid pid Process id of the target process. Maybe issued
multiple times to scan multiple processes. --pid
and --cgroup are mutually exclusive. If neither
are provided, all processes are scanned to
provide system-wide information.
--cgroup path Path to the target cgroup in sysfs. Iterates
over every pid in the cgroup and its children.
--pid and --cgroup are mutually exclusive. If
neither are provided, all processes are scanned
to provide system-wide information.
--rollup Sum the per-vma statistics to provide a summary
over the whole system, process or cgroup.
--cont size[KMG] Adds stats for memory that is mapped in
contiguous blocks of <size> and also aligned to
<size>. May be issued multiple times to track
multiple sized blocks. Useful to infer e.g.
arm64 contpte and hpa mappings. Size must be a
power-of-2 number of pages.
--inc-smaps Include all numerical, additive
/proc/<pid>/smaps stats in the output.
--inc-empty Show all statistics including those whose value
is 0.
--periodic sleep_ms Run in a loop, polling every sleep_ms
milliseconds.
Requires root privilege to access pagemap and kpageflags.
--8<--
Example command to summarise fully and partially mapped THPs and 64K
contiguous blocks over all VMAs in all processes in the system
(--inc-empty forces printing stats that are 0):
# ./thpmaps --cont 64K --rollup --inc-empty
--8<--
anon-thp-pmd-aligned-2048kB: 139264 kB ( 6%)
file-thp-pmd-aligned-2048kB: 0 kB ( 0%)
anon-thp-pte-aligned-16kB: 0 kB ( 0%)
anon-thp-pte-aligned-32kB: 0 kB ( 0%)
anon-thp-pte-aligned-64kB: 72256 kB ( 3%)
anon-thp-pte-aligned-128kB: 0 kB ( 0%)
anon-thp-pte-aligned-256kB: 0 kB ( 0%)
anon-thp-pte-aligned-512kB: 0 kB ( 0%)
anon-thp-pte-aligned-1024kB: 0 kB ( 0%)
anon-thp-pte-aligned-2048kB: 0 kB ( 0%)
anon-thp-pte-unaligned-16kB: 0 kB ( 0%)
anon-thp-pte-unaligned-32kB: 0 kB ( 0%)
anon-thp-pte-unaligned-64kB: 0 kB ( 0%)
anon-thp-pte-unaligned-128kB: 0 kB ( 0%)
anon-thp-pte-unaligned-256kB: 0 kB ( 0%)
anon-thp-pte-unaligned-512kB: 0 kB ( 0%)
anon-thp-pte-unaligned-1024kB: 0 kB ( 0%)
anon-thp-pte-unaligned-2048kB: 0 kB ( 0%)
anon-thp-pte-partial: 63232 kB ( 3%)
file-thp-pte-aligned-16kB: 809024 kB (47%)
file-thp-pte-aligned-32kB: 43168 kB ( 3%)
file-thp-pte-aligned-64kB: 98496 kB ( 6%)
file-thp-pte-aligned-128kB: 17536 kB ( 1%)
file-thp-pte-aligned-256kB: 0 kB ( 0%)
file-thp-pte-aligned-512kB: 0 kB ( 0%)
file-thp-pte-aligned-1024kB: 0 kB ( 0%)
file-thp-pte-aligned-2048kB: 0 kB ( 0%)
file-thp-pte-unaligned-16kB: 21712 kB ( 1%)
file-thp-pte-unaligned-32kB: 704 kB ( 0%)
file-thp-pte-unaligned-64kB: 896 kB ( 0%)
file-thp-pte-unaligned-128kB: 44928 kB ( 3%)
file-thp-pte-unaligned-256kB: 0 kB ( 0%)
file-thp-pte-unaligned-512kB: 0 kB ( 0%)
file-thp-pte-unaligned-1024kB: 0 kB ( 0%)
file-thp-pte-unaligned-2048kB: 0 kB ( 0%)
file-thp-pte-partial: 9252 kB ( 1%)
anon-cont-pmd-aligned-64kB: 139264 kB ( 6%)
file-cont-pmd-aligned-64kB: 0 kB ( 0%)
anon-cont-pte-aligned-64kB: 100672 kB ( 4%)
file-cont-pte-aligned-64kB: 161856 kB ( 9%)
--8<--
Link: https://lkml.kernel.org/r/20240116141235.960842-1-ryan.roberts@arm.com
Signed-off-by: Ryan Roberts <ryan.roberts@arm.com>
Tested-by: Barry Song <v-songbaohua@oppo.com>
Cc: Alistair Popple <apopple@nvidia.com>
Cc: David Hildenbrand <david@redhat.com>
Cc: John Hubbard <jhubbard@nvidia.com>
Cc: Kefeng Wang <wangkefeng.wang@huawei.com>
Cc: Matthew Wilcox (Oracle) <willy@infradead.org>
Cc: William Kucharski <william.kucharski@oracle.com>
Cc: Zenghui Yu <yuzenghui@huawei.com>
Cc: Zi Yan <ziy@nvidia.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
|
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|
Audra Mitchell
|
d8ea435f07 |
tools/mm: update the usage output to be more organized
Organize the usage options alphabetically and improve the description of some options. Also separate the more complicated cull options from the single use compare options. Link: https://lkml.kernel.org/r/20231013190350.579407-6-audra@redhat.com Signed-off-by: Audra Mitchell <audra@redhat.com> Acked-by: Rafael Aquini <aquini@redhat.com> Acked-by: Vlastimil Babka <vbabka@suse.cz> Cc: Georgi Djakov <djakov@kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> |
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|
Audra Mitchell
|
c6d5e4901e |
tools/mm: fix the default case for page_owner_sort
With the additional commands and timestamps added to the tool, the default case (-t) has been broken. Now that the allocation timestamps are saved outside of the txt field, allow us to properly sort the data by number of times the record has been seen. Furthermore prevent the misuse of the commandline arguments so only one compare option can be used. Link: https://lkml.kernel.org/r/20231013190350.579407-5-audra@redhat.com Signed-off-by: Audra Mitchell <audra@redhat.com> Acked-by: Rafael Aquini <aquini@redhat.com> Acked-by: Vlastimil Babka <vbabka@suse.cz> Cc: Georgi Djakov <djakov@kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> |
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Audra Mitchell
|
63a150623a |
tools/mm: filter out timestamps for correct collation
With the introduction of allocation timestamps being included in page_owner output, each record becomes unique due to the timestamp nanosecond granularity. Remove the check in add_list that tries to collate each record during processing as the memcmp() is just additional overhead at this point. Also keep the allocation timestamps, but allow collation to occur without consideration of the allocation timestamp except in the case were allocation timestamps are requested by the user (the -a option). Link: https://lkml.kernel.org/r/20231013190350.579407-4-audra@redhat.com Signed-off-by: Audra Mitchell <audra@redhat.com> Acked-by: Rafael Aquini <aquini@redhat.com> Acked-by: Vlastimil Babka <vbabka@suse.cz> Cc: Georgi Djakov <djakov@kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> |
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Audra Mitchell
|
0179c62839 |
tools/mm: remove references to free_ts from page_owner_sort
With the removal of free timestamps from page_owner output, we no longer need to handle this case or the "unreleased" case. Remove all references to both cases. Link: https://lkml.kernel.org/r/20231013190350.579407-3-audra@redhat.com Signed-off-by: Audra Mitchell <audra@redhat.com> Acked-by: Rafael Aquini <aquini@redhat.com> Reviewed-by: Vlastimil Babka <vbabka@suse.cz> Cc: Georgi Djakov <djakov@kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> |
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Xie XiuQi
|
7f33105cdd |
tools/mm: fix undefined reference to pthread_once
Commit |
||
|
Linus Torvalds
|
736b378b29 |
slab changes for 6.4
-----BEGIN PGP SIGNATURE----- iQEzBAABCAAdFiEEe7vIQRWZI0iWSE3xu+CwddJFiJoFAmRCSGEACgkQu+CwddJF iJpA2wgAkwMP++Znd8JU3iQ4N53lv18euNuEMLTOY+jk7zXHvsRX8KyzLmsohUKO SSGVi1Om785AidOsJhARJawW7AWYuJ5l7ri+FyskTwrTUcMC4UZ/IT2tB22lRsXi 0f3lgbdArZbj7aq7AVO9N7bh9rgVUHa/RHIwXzMp0sc9nekne9t+FFv7tyRnr7cc SMp/FdMZqbt9pVf0Uwud1BpdgER7QqQaSfaxITL7D2oJTePRZVWiXerrr4hMcQl1 s6kgUgKdlaYmIx2N8eP1Nmp7undtwHo1C8dLLWKGCEuEAaXIxtXUtaUWFFmBDzH9 Fv6qswNFcfwiLNPsY+xi9iA+vlGKAg== =T0EM -----END PGP SIGNATURE----- Merge tag 'slab-for-6.4' of git://git.kernel.org/pub/scm/linux/kernel/git/vbabka/slab Pull slab updates from Vlastimil Babka: "The main change is naturally the SLOB removal. Since its deprecation in 6.2 I've seen no complaints so hopefully SLUB_(TINY) works well for everyone and we can proceed. Besides the code cleanup, the main immediate benefit will be allowing kfree() family of function to work on kmem_cache_alloc() objects, which was incompatible with SLOB. This includes kfree_rcu() which had no kmem_cache_free_rcu() counterpart yet and now it shouldn't be necessary anymore. Besides that, there are several small code and comment improvements from Thomas, Thorsten and Vernon" * tag 'slab-for-6.4' of git://git.kernel.org/pub/scm/linux/kernel/git/vbabka/slab: mm/slab: document kfree() as allowed for kmem_cache_alloc() objects mm/slob: remove slob.c mm/slab: remove CONFIG_SLOB code from slab common code mm, pagemap: remove SLOB and SLQB from comments and documentation mm, page_flags: remove PG_slob_free mm/slob: remove CONFIG_SLOB mm/slub: fix help comment of SLUB_DEBUG mm: slub: make kobj_type structure constant slab: Adjust comment after refactoring of gfp.h |
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Steve Chou
|
9235756885 |
tools/mm/page_owner_sort.c: fix TGID output when cull=tg is used
When using cull option with 'tg' flag, the fprintf is using pid instead
of tgid. It should use tgid instead.
Link: https://lkml.kernel.org/r/20230411034929.2071501-1-steve_chou@pesi.com.tw
Fixes:
|
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Vlastimil Babka
|
c4ba69f00c |
mm, page_flags: remove PG_slob_free
With SLOB removed we no longer need the PG_slob_free alias for PG_private. Also update tools/mm/page-types. Signed-off-by: Vlastimil Babka <vbabka@suse.cz> Acked-by: Hyeonggon Yoo <42.hyeyoo@gmail.com> Acked-by: Lorenzo Stoakes <lstoakes@gmail.com> Acked-by: Mike Rapoport (IBM) <rppt@kernel.org> |
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Herton R. Krzesinski
|
e6d2c436ff |
tools/mm: allow users to provide additional cflags/ldflags
Right now there is no way to provide additional cflags/ldflags when building tools/vm binaries. And using eg. make CFLAGS=<options> will override the CFLAGS being set in the Makefile, making the build fail since it requires the include of the ../lib dir (for libapi). This change then allows you to specify: CFLAGS=<options> LDFLAGS=<options> make V=1 -C tools/vm And the options will be correctly appended as can be seen from the make output. Link: https://lkml.kernel.org/r/20230116224921.4106324-1-herton@redhat.com Signed-off-by: Herton R. Krzesinski <herton@redhat.com> Cc: Don Zickus <dzickus@redhat.com> Cc: Justin Forbes <jforbes@redhat.com> Cc: Vlastimil Babka <vbabka@suse.cz> Cc: Scott Weaver <scweaver@redhat.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> |
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SeongJae Park
|
799fb82aa1 |
tools/vm: rename tools/vm to tools/mm
Rename tools/vm to tools/mm for being more consistent with the code and documentation directories, and won't be confused with virtual machines. Link: https://lkml.kernel.org/r/20230103180754.129637-4-sj@kernel.org Signed-off-by: SeongJae Park <sj@kernel.org> Cc: Jonathan Corbet <corbet@lwn.net> Cc: Shuah Khan <shuah@kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> |