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1b089def0f
linux/mm
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Usama Arif 1b089def0f mm/vmscan: add pgrotate_anon and pgrotate_file vmstat counters 
Reclaim can spend substantial work on an LRU type without immediately
reclaiming or demoting a corresponding amount of memory.  Record this work
in PGROTATE_ANON and PGROTATE_FILE.

For classic LRU reclaim:

  - Inactive-list reclaim adds nr_scanned - nr_reclaimed to the
    corresponding anon/file counter when isolation succeeds.
  - Active-list reclaim adds referenced executable file folios that
    are retained on the active list to PGROTATE_FILE. Active anon
    reclaim does not contribute this component.

For MGLRU, add the number of initially isolated pages that remain
unreclaimed after both the initial and retry passes to the counter for the
selected anon/file type.

These counters are distinct from the existing pgrotated vm event. 
pgrotated records an actual move to the inactive-list tail, primarily
after reclaim-marked writeback completes or failed invalidation leaves a
folio for accelerated reclaim.  PGROTATE_ANON and PGROTATE_FILE measure
reclaim cost and do not imply that a folio moved to an LRU tail.

A subsequent patch will consume these counters for anon/file scan
balancing.

Link: https://lore.kernel.org/20260727162550.2032-3-usama.arif@linux.dev
Signed-off-by: Usama Arif <usama.arif@linux.dev>
Acked-by: Shakeel Butt <shakeel.butt@linux.dev>
Acked-by: Johannes Weiner <hannes@cmpxchg.org>
Reviewed-by: Vlastimil Babka (SUSE) <vbabka@kernel.org>
Cc: Axel Rasmussen <axelrasmussen@google.com>
Cc: Baoquan He <baoquan.he@linux.dev>
Cc: Chris Li <chrisl@kernel.org>
Cc: David Hildenbrand <david@kernel.org>
Cc: David Rientjes <rientjes@google.com>
Cc: Kairui Song <kasong@tencent.com>
Cc: Liam R. Howlett <liam@infradead.org>
Cc: Lorenzo Stoakes <ljs@kernel.org>
Cc: Michal Hocko <mhocko@suse.com>
Cc: Mike Rapoport <rppt@kernel.org>
Cc: Muchun Song <muchun.song@linux.dev>
Cc: Nhat Pham <nphamcs@gmail.com>
Cc: Roman Gushchin <roman.gushchin@linux.dev>
Cc: Suren Baghdasaryan <surenb@google.com>
Cc: Wei Xu <weixugc@google.com>
Cc: Yuanchu Xie <yuanchu@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
2026-08-24 18:42:56 -07:00
..
damon Merge branch 'mm-hotfixes-stable' into mm-stable to pick up 2026-08-24 18:40:27 -07:00
kasan mm/kasan: remove redundant initialization for kasan_flag_write_only 2026-07-28 21:11:44 -07:00
kfence slab changes for 7.2 - part 2 2026-06-22 08:28:48 -07:00
kmsan mm: split out vmalloc declarations from internal.h 2026-08-04 19:18:46 -07:00
tests
alloc_tag.c mm: replace __GFP_NO_CODETAG with ALLOC_NO_CODETAG 2026-07-30 19:40:44 -07:00
backing-dev.c mm: blk-cgroup: fix use-after-free in cgwb_release_workfn() 2026-04-18 23:24:27 -07:00
balloon.c
bpf_memcontrol.c
cma_debug.c mm/cma_debug: fix invalid accesses for inactive CMA areas 2026-05-28 20:50:33 -07:00
cma_sysfs.c mm/cma_sysfs: skip inactive CMA areas in sysfs 2026-06-03 16:25:49 -07:00
cma.c mm: split out mm_init and memblock declarations from internal.h 2026-08-04 19:18:45 -07:00
cma.h
compaction.c mm: page_alloc: fix non-movable reclaim storm in defrag_mode 2026-08-06 18:57:24 -07:00
debug_page_alloc.c
debug_page_ref.c
debug_vm_pgtable.c mm: decouple protnone helpers from CONFIG_NUMA_BALANCING 2026-08-04 19:18:36 -07:00
debug.c mm: prefer mm->def_vma_flags in mm logic 2026-08-06 18:57:02 -07:00
dmapool_test.c
dmapool.c
early_ioremap.c mm/early_ioremap: clarify early_ioremap_reset() semantics 2026-08-06 18:57:21 -07:00
execmem.c mm: split out vmalloc declarations from internal.h 2026-08-04 19:18:46 -07:00
fadvise.c
fail_page_alloc.c
failslab.c
filemap.c Merge branch 'mm-hotfixes-stable' into mm-stable to pick up 2026-08-24 18:40:27 -07:00
folio-compat.c
folio.c mm: rename swap.c to folio.c 2026-08-04 19:18:35 -07:00
gup_test.c mm/gup_test: reject wrapped user ranges 2026-06-21 11:37:37 -07:00
gup_test.h
gup.c mm: provide vma_[flags_]is_cow_mapping() and remove is_cow_mapping() 2026-08-24 18:42:50 -07:00
highmem.c
hmm.c mm/hmm: add hmm_range_fault_unlocked_timeout() for mmap lock-drop support 2026-08-04 19:18:54 -07:00
huge_memory.c mm/rmap: use anon pgoff to track MAP_PRIVATE file-backed anon folios 2026-08-24 18:42:53 -07:00
hugetlb_cgroup.c
hugetlb_cma.c mm/hugetlb: remove unused bootmem cma field 2026-07-28 21:12:00 -07:00
hugetlb_cma.h mm/hugetlb: refactor early boot gigantic hugepage allocation 2026-07-28 21:11:59 -07:00
hugetlb_internal.h
hugetlb_sysctl.c
hugetlb_sysfs.c
hugetlb_vmemmap.c mm/hugetlb_vmemmap: remove bootmem_info leftovers 2026-08-04 19:18:42 -07:00
hugetlb_vmemmap.h mm/sparse-vmemmap: remove sparse_vmemmap_init_nid_late() 2026-07-28 21:12:00 -07:00
hugetlb.c mm: provide vma_[flags_]is_cow_mapping() and remove is_cow_mapping() 2026-08-24 18:42:50 -07:00
hwpoison-inject.c
init-mm.c exec_state: relocate dumpable information 2026-05-26 11:02:01 +02:00
internal.h mm/rmap: use anon pgoff to track MAP_PRIVATE file-backed anon folios 2026-08-24 18:42:53 -07:00
interval_tree.c mm/rmap: use anon pgoff to track MAP_PRIVATE file-backed anon folios 2026-08-24 18:42:53 -07:00
ioremap.c
Kconfig mm/kconfig: drop redundant dependency wrappers 2026-08-24 18:42:49 -07:00
Kconfig.debug mm: move alloc tag to mm 2026-07-28 21:12:03 -07:00
khugepaged.c mm/khugepaged: replace mutex_lock/mutex_unlock usage with guard macro 2026-08-06 18:57:26 -07:00
kmemleak.c mm/kmemleak: report RCU-tasks quiescent states during the scan 2026-08-24 18:42:54 -07:00
ksm.c mm/rmap: use anon pgoff to track MAP_PRIVATE file-backed anon folios 2026-08-24 18:42:53 -07:00
list_lru.c mm.git review status for mm-hotfixes-stable..mm-stable 2026-06-19 10:14:34 -07:00
maccess.c
madvise.c mm/madvise: skip device-private PMDs in cold and pageout walks 2026-08-04 19:19:05 -07:00
Makefile mm/bootmem_info: remove CONFIG_HAVE_BOOTMEM_INFO_NODE 2026-08-04 19:18:42 -07:00
mapping_dirty_helpers.c mm/vma: use vma_start_pgoff(), linear_page_index() in mm code 2026-08-04 19:19:00 -07:00
memblock.c mm: split out mm_init and memblock declarations from internal.h 2026-08-04 19:18:45 -07:00
memcontrol-v1.c mm: memcg-v1: make mem_cgroup_oom_notify_cb() return void 2026-08-06 18:56:55 -07:00
memcontrol-v1.h Merge branch 'mm-hotfixes-stable' into mm-stable in order to pick up 2026-08-04 19:15:12 -07:00
memcontrol.c mm/vmscan: add pgrotate_anon and pgrotate_file vmstat counters 2026-08-24 18:42:56 -07:00
memfd_luo.c mm/memfd_luo: document preservation of file seals 2026-05-04 14:03:16 +00:00
memfd.c mm/vma: update do_mmap() to use vma_flags_t 2026-08-06 18:57:01 -07:00
memory_hotplug.c mm/memory_hotplug: add offline_and_remove_memory_ranges() 2026-08-06 18:56:59 -07:00
memory-failure.c mm: introduce and use vma_filebacked_address() 2026-08-24 18:42:51 -07:00
memory-tiers.c
memory.c mm: update print_bad_page_map() to show anon index if appropriate 2026-08-24 18:42:51 -07:00
mempolicy.c mm: provide vma_[flags_]is_cow_mapping() and remove is_cow_mapping() 2026-08-24 18:42:50 -07:00
mempool.c mm: simplify the mempool_alloc_bulk API 2026-06-03 18:20:47 +02:00
memremap.c mm: decrement MTHP_STAT_NR_ANON in free_zone_device_folio() 2026-07-28 17:37:31 -07:00
memtest.c
migrate_device.c mm: rename uffd-wp PTE accessors to uffd 2026-08-04 19:18:36 -07:00
migrate.c mm/migrate: calculate large folio page index using PFN 2026-08-24 18:42:53 -07:00
mincore.c mm: mincore: refactor mincore_page() 2026-08-06 18:57:15 -07:00
mlock.c mm/mlock: convert mlock code to use vma_flags_t 2026-08-06 18:57:03 -07:00
mm_init.c mm: split out vmalloc declarations from internal.h 2026-08-04 19:18:46 -07:00
mm_init.h mm: split out mm_init and memblock declarations from internal.h 2026-08-04 19:18:45 -07:00
mm_slot.h mm/mm_slot.h: add comments for mm_slot_lookup/insert 2026-08-06 18:57:04 -07:00
mmap_lock.c
mmap.c mm/vma: convert miscellaneous uses of VMA flags in core mm 2026-08-06 18:57:03 -07:00
mmu_gather.c
mmu_notifier.c mm/vma: correct incorrect vma.h inclusion 2026-08-04 19:19:04 -07:00
mmzone.c mm: constify oom_control, scan_control, and alloc_context nodemask 2026-07-28 21:12:04 -07:00
mprotect.c mm/mprotect: convert mprotect code to use vma_flags_t 2026-08-06 18:57:04 -07:00
mremap.c mm: propagate VMA anonymous page offset on map, remap, split + merge 2026-08-24 18:42:52 -07:00
mseal.c mm/mseal: remove further superfluous comments, do_mseal() 2026-08-06 18:57:12 -07:00
msync.c mm/vma: use vma_start_pgoff(), linear_page_index() in mm code 2026-08-04 19:19:00 -07:00
nommu.c mm: nommu: point to the write iterator upon split_vma 2026-08-24 18:42:48 -07:00
numa_emulation.c mm/fake-numa: fix under-allocation detection in uniform split 2026-06-02 08:34:03 +03:00
numa_memblks.c
numa.c
oom_kill.c
page_alloc.c mm: page_alloc: fix non-movable reclaim storm in defrag_mode 2026-08-06 18:57:24 -07:00
page_alloc.h mm: replace __GFP_NO_CODETAG with ALLOC_NO_CODETAG 2026-07-30 19:40:44 -07:00
page_counter.c
page_ext.c
page_frag_cache.c mm: replace __GFP_NO_CODETAG with ALLOC_NO_CODETAG 2026-07-30 19:40:44 -07:00
page_idle.c
page_io.c block-7.2-20260625 2026-06-25 09:56:47 -07:00
page_isolation.c mm: split out internal page_alloc.h 2026-07-30 19:40:41 -07:00
page_owner.c mm: split out internal page_alloc.h 2026-07-30 19:40:41 -07:00
page_poison.c
page_reporting.c Merge branch 'mm-hotfixes-stable' into mm-stable in order to pick up 2026-08-04 19:15:12 -07:00
page_reporting.h
page_table_check.c Merge branch 'mm-hotfixes-stable' into mm-stable to pick up 2026-08-24 18:40:27 -07:00
page_vma_mapped.c mm/rmap: use anon pgoff to track MAP_PRIVATE file-backed anon folios 2026-08-24 18:42:53 -07:00
page-writeback.c mm: remove wb_writeout_inc 2026-08-04 19:18:48 -07:00
pagewalk.c Merge branch 'mm-hotfixes-stable' into mm-stable to pick up 2026-08-24 18:40:27 -07:00
percpu-internal.h mm/percpu-internal.h: optimise pcpu_chunk struct to save memory 2026-06-02 15:22:13 -07:00
percpu-km.c mm/percpu-km: clear page->private before free them 2026-08-04 19:18:32 -07:00
percpu-stats.c
percpu-vm.c mm: split out vmalloc declarations from internal.h 2026-08-04 19:18:46 -07:00
percpu.c mm/percpu: avoid IO/FS reclaim in backing allocations 2026-07-28 21:11:47 -07:00
pgalloc-track.h
pgtable-generic.c
process_vm_access.c
ptdump.c mm/ptdump: always stabilise against page table freeing using init_mm 2026-08-04 20:02:00 -07:00
readahead.c Revert "mm: limit filemap_fault readahead to VMA boundaries" 2026-06-21 11:37:38 -07:00
rmap.c mm: vmscan: convert folio_referenced() to use vma_flags_t 2026-08-24 18:42:54 -07:00
rodata_test.c
secretmem.c mm/secretmem: don't allow highmem folios 2026-08-06 18:57:09 -07:00
shmem_quota.c
shmem.c mm/shmem: downgrade final i_blocks check in shmem_evict_inode() to pr_warn() 2026-08-06 18:57:27 -07:00
show_mem.c mm: split out internal page_alloc.h 2026-07-30 19:40:41 -07:00
shrinker_debug.c mm: shrinker: fix NULL pointer dereference in debugfs 2026-07-01 19:02:52 -07:00
shrinker.c mm: shrinker: fix shrinker_info teardown race with expansion 2026-07-01 19:02:52 -07:00
shuffle.c mm: split out internal page_alloc.h 2026-07-30 19:40:41 -07:00
shuffle.h
slab_common.c mm/slab: prevent unbounded recursion in free path with new kmalloc type 2026-07-14 17:22:40 +02:00
slab.h mm: fix ASSERT_EXCLUSIVE_BITS by passing memdesc_flags_t by pointer 2026-07-30 19:40:31 -07:00
slub.c mm: factor out can_spin_trylock() 2026-07-30 19:40:44 -07:00
sparse-vmemmap.c mm: split out sparse declarations from internal.h 2026-08-04 19:18:46 -07:00
sparse.c mm: split out sparse declarations from internal.h 2026-08-04 19:18:46 -07:00
sparse.h mm: split out sparse declarations from internal.h 2026-08-04 19:18:46 -07:00
swap_state.c mm/swap: colocate page-cluster sysctl with swap readahead 2026-08-04 19:18:34 -07:00
swap_table.h mm, swap: merge zeromap into swap table 2026-06-02 15:22:23 -07:00
swap.h memcg: move mem_cgroup_swappiness and vm_swappiness to mm/swap.h 2026-08-24 18:42:55 -07:00
swapfile.c Merge branch 'mm-hotfixes-stable' into mm-stable to pick up 2026-08-24 18:40:27 -07:00
truncate.c mm/truncate: use folio_split() in truncate_inode_partial_folio() 2026-06-21 11:37:16 -07:00
usercopy.c
userfaultfd.c mm/rmap: use anon pgoff to track MAP_PRIVATE file-backed anon folios 2026-08-24 18:42:53 -07:00
util.c mm/vma: update do_mmap() to use vma_flags_t 2026-08-06 18:57:01 -07:00
vma_exec.c mm: propagate VMA anonymous page offset on map, remap, split + merge 2026-08-24 18:42:52 -07:00
vma_init.c mm/vma: introduce VMA anon page offset field and add helpers 2026-08-24 18:42:49 -07:00
vma_internal.h mm/vma: correct incorrect vma.h inclusion 2026-08-04 19:19:04 -07:00
vma.c mm/rmap: use anon pgoff to track MAP_PRIVATE file-backed anon folios 2026-08-24 18:42:53 -07:00
vma.h mm: propagate VMA anonymous page offset on map, remap, split + merge 2026-08-24 18:42:52 -07:00
vmalloc.c Merge branch 'mm-hotfixes-stable' into mm-stable to pick up 2026-08-24 18:40:27 -07:00
vmalloc.h mm: split out vmalloc declarations from internal.h 2026-08-04 19:18:46 -07:00
vmpressure.c mm/vmpressure: move v1 userspace eventfd code into memcontrol-v1.c 2026-07-30 19:40:28 -07:00
vmscan.c mm/vmscan: add pgrotate_anon and pgrotate_file vmstat counters 2026-08-24 18:42:56 -07:00
vmstat.c mm/vmscan: add pgrotate_anon and pgrotate_file vmstat counters 2026-08-24 18:42:56 -07:00
workingset.c mm/mglru: use folio_mark_accessed to replace folio_set_active 2026-06-04 14:45:02 -07:00
zpdesc.h
zsmalloc.c mm/zsmalloc: fix release order of locks in zs_page_migrate() 2026-08-06 18:57:26 -07:00
zswap.c mm, swap: add support for stable large allocation in swap cache directly 2026-06-02 15:22:21 -07:00