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linux/mm
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Maarten Lankhorst b168ed458d
kernel/cgroup: Add "dmem" memory accounting cgroup 
This code is based on the RDMA and misc cgroup initially, but now
uses page_counter. It uses the same min/low/max semantics as the memory
cgroup as a result.

There's a small mismatch as TTM uses u64, and page_counter long pages.
In practice it's not a problem. 32-bits systems don't really come with
>=4GB cards and as long as we're consistently wrong with units, it's
fine. The device page size may not be in the same units as kernel page
size, and each region might also have a different page size (VRAM vs GART
for example).

The interface is simple:
- Call dmem_cgroup_register_region()
- Use dmem_cgroup_try_charge to check if you can allocate a chunk of memory,
  use dmem_cgroup__uncharge when freeing it. This may return an error code,
  or -EAGAIN when the cgroup limit is reached. In that case a reference
  to the limiting pool is returned.
- The limiting cs can be used as compare function for
  dmem_cgroup_state_evict_valuable.
- After having evicted enough, drop reference to limiting cs with
  dmem_cgroup_pool_state_put.

This API allows you to limit device resources with cgroups.
You can see the supported cards in /sys/fs/cgroup/dmem.capacity
You need to echo +dmem to cgroup.subtree_control, and then you can
partition device memory.

Co-developed-by: Friedrich Vock <friedrich.vock@gmx.de>
Signed-off-by: Friedrich Vock <friedrich.vock@gmx.de>
Co-developed-by: Maxime Ripard <mripard@kernel.org>
Signed-off-by: Maarten Lankhorst <dev@lankhorst.se>
Acked-by: Tejun Heo <tj@kernel.org>
Link: https://lore.kernel.org/r/20241204143112.1250983-1-dev@lankhorst.se
Signed-off-by: Maxime Ripard <mripard@kernel.org>
2025-01-06 17:24:38 +01:00
..
damon mm/damon/core: fix ignored quota goals and filters of newly committed schemes 2024-12-30 17:59:11 -08:00
kasan 24 hotfixes. 17 are cc:stable. 15 are MM and 9 are non-MM. 2024-12-08 11:26:13 -08:00
kfence mm/kfence: add a new kunit test test_use_after_free_read_nofault() 2024-11-14 22:49:19 -08:00
kmsan mm, kasan, kmsan: instrument copy_from/to_kernel_nofault 2024-11-06 20:11:14 -08:00
backing-dev.c writeback: support retrieving per group debug writeback stats of bdi 2024-05-05 17:53:51 -07:00
balloon_compaction.c mm: remove MIGRATE_SYNC_NO_COPY mode 2024-07-03 19:30:00 -07:00
bootmem_info.c bootmem: stop using page->index 2024-11-07 14:38:07 -08:00
cma_debug.c
cma_sysfs.c mm/cma: add sysfs file 'release_pages_success' 2024-02-22 10:24:57 -08:00
cma.c cma: enforce non-zero pageblock_order during cma_init_reserved_mem() 2024-11-14 22:49:19 -08:00
cma.h mm/cma: add sysfs file 'release_pages_success' 2024-02-22 10:24:57 -08:00
compaction.c mm:page_alloc: fix the NULL ac->nodemask in __alloc_pages_slowpath() 2024-09-03 21:15:47 -07:00
debug_page_alloc.c mm: page_alloc: consolidate free page accounting 2024-04-25 20:56:04 -07:00
debug_page_ref.c
debug_vm_pgtable.c mm/debug_vm_pgtable: Use pxdp_get() for accessing page table entries 2024-09-17 01:07:01 -07:00
debug.c mm: open-code page_folio() in dump_page() 2024-12-05 19:54:45 -08:00
dmapool_test.c mm/dmapool: add MODULE_DESCRIPTION() 2024-07-03 19:29:58 -07:00
dmapool.c mm/mempool/dmapool: remove CONFIG_DEBUG_SLAB ifdefs 2023-12-05 11:17:58 +01:00
early_ioremap.c
execmem.c alloc_tag: populate memory for module tags as needed 2024-11-07 14:25:16 -08:00
fadvise.c fdget(), trivial conversions 2024-11-03 01:28:06 -05:00
fail_page_alloc.c fault-inject: improve build for CONFIG_FAULT_INJECTION=n 2024-09-01 20:43:33 -07:00
failslab.c fault-inject: improve build for CONFIG_FAULT_INJECTION=n 2024-09-01 20:43:33 -07:00
filemap.c mm, madvise: fix potential workingset node list_lru leaks 2024-12-30 17:59:11 -08:00
folio-compat.c mm/writeback: add folio_mark_dirty_lock() 2024-11-05 11:14:32 +01:00
gup_test.c
gup_test.h
gup.c mm/gup: handle NULL pages in unpin_user_pages() 2024-12-05 19:54:42 -08:00
highmem.c mm/highmem: make nr_free_highpages() return "unsigned long" 2024-07-03 19:30:06 -07:00
hmm.c mm: provide mm_struct and address to huge_ptep_get() 2024-07-12 15:52:15 -07:00
huge_memory.c mm: huge_memory: handle strsep not finding delimiter 2024-12-18 19:04:47 -08:00
hugetlb_cgroup.c mm: memcg: don't call propagate_protected_usage() needlessly 2024-09-01 20:25:50 -07:00
hugetlb_vmemmap.c mm/hugetlb_vmemmap: don't synchronize_rcu() without HVO 2024-09-01 20:25:45 -07:00
hugetlb_vmemmap.h mm: hugetlb_vmemmap: fix reference to nonexistent file 2023-10-25 16:47:14 -07:00
hugetlb.c mm: hugetlb: independent PMD page table shared count 2024-12-30 17:59:07 -08:00
hwpoison-inject.c mm/hwpoison: add MODULE_DESCRIPTION() 2024-07-03 19:29:58 -07:00
init-mm.c mm: Deprecate pasid field 2023-12-12 10:11:32 +01:00
internal.h mm, madvise: fix potential workingset node list_lru leaks 2024-12-30 17:59:11 -08:00
interval_tree.c
io-mapping.c
ioremap.c
Kconfig arm64 updates for 6.13: 2024-11-18 18:10:37 -08:00
Kconfig.debug slub: Introduce CONFIG_SLUB_RCU_DEBUG 2024-08-27 14:12:51 +02:00
khugepaged.c mm, madvise: fix potential workingset node list_lru leaks 2024-12-30 17:59:11 -08:00
kmemleak.c mm/kmemleak: fix sleeping function called from invalid context at print message 2024-12-30 17:59:07 -08:00
ksm.c - The series "zram: optimal post-processing target selection" from 2024-11-23 09:58:07 -08:00
list_lru.c mm/list_lru: fix false warning of negative counter 2024-12-30 17:59:10 -08:00
maccess.c kasan: migrate copy_user_test to kunit 2024-11-11 00:26:44 -08:00
madvise.c mm: madvise: implement lightweight guard page mechanism 2024-11-11 00:26:45 -08:00
Makefile mm: move the page fragment allocator from page_alloc into its own file 2024-11-11 10:56:26 -08:00
mapping_dirty_helpers.c
memblock.c memblock: allow zero threshold in validate_numa_converage() 2024-12-01 21:08:56 +02:00
memcontrol-v1.c - The series "zram: optimal post-processing target selection" from 2024-11-23 09:58:07 -08:00
memcontrol-v1.h mm: memcg: declare do_memsw_account inline 2024-12-05 19:54:46 -08:00
memcontrol.c memcg/hugetlb: add hugeTLB counters to memcg 2024-11-14 22:49:19 -08:00
memfd.c mm: reinstate ability to map write-sealed memfd mappings read-only 2024-12-30 17:59:06 -08:00
memory_hotplug.c kaslr: rename physmem_end and PHYSMEM_END to direct_map_physmem_end 2024-11-06 20:11:11 -08:00
memory-failure.c mm/memory-failure: replace sprintf() with sysfs_emit() 2024-11-11 00:26:46 -08:00
memory-tiers.c memory tiers: use default_dram_perf_ref_source in log message 2024-09-26 14:01:44 -07:00
memory.c mm: use clear_user_(high)page() for arch with special user folio handling 2024-12-18 19:04:43 -08:00
mempolicy.c mm/mempolicy: fix migrate_to_node() assuming there is at least one VMA in a MM 2024-12-05 19:54:43 -08:00
mempool.c mm: fix xyz_noprof functions calling profiled functions 2024-06-05 19:19:26 -07:00
memremap.c mm: convert put_devmap_managed_page_refs() to put_devmap_managed_folio_refs() 2024-05-05 17:53:49 -07:00
memtest.c memtest: use {READ,WRITE}_ONCE in memory scanning 2024-03-13 12:12:21 -07:00
migrate_device.c mm: remap unused subpages to shared zeropage when splitting isolated thp 2024-09-09 16:39:03 -07:00
migrate.c mm/codetag: swap tags when migrate pages 2024-12-05 19:54:46 -08:00
mincore.c mm: provide mm_struct and address to huge_ptep_get() 2024-07-12 15:52:15 -07:00
mlock.c mm/mlock: set the correct prev on failure 2024-11-07 14:14:58 -08:00
mm_init.c memblock: updates for 6.13-rc1 2024-11-27 11:13:25 -08:00
mm_slot.h
mmap_lock.c mm: mmap_lock: check trace_mmap_lock_$type_enabled() instead of regcount 2024-11-11 17:22:28 -08:00
mmap.c mm: don't try THP alignment for FS without get_unmapped_area 2024-12-30 17:59:06 -08:00
mmu_gather.c mm/mmu_gather: improve cond_resched() handling with large folios and expensive page freeing 2024-02-22 15:27:17 -08:00
mmu_notifier.c mm: move internal core VMA manipulation functions to own file 2024-09-01 20:25:54 -07:00
mmzone.c mm: improve code consistency with zonelist_* helper functions 2024-09-01 20:25:55 -07:00
mprotect.c mm: add PTE_MARKER_GUARD PTE marker 2024-11-11 00:26:44 -08:00
mremap.c - The series "zram: optimal post-processing target selection" from 2024-11-23 09:58:07 -08:00
mseal.c mm: madvise: implement lightweight guard page mechanism 2024-11-11 00:26:45 -08:00
msync.c
nommu.c nommu: pass NULL argument to vma_iter_prealloc() 2024-11-11 17:20:23 -08:00
numa_emulation.c mm: introduce numa_emulation 2024-09-03 21:15:31 -07:00
numa_memblks.c mm: numa_clear_kernel_node_hotplug: Add NUMA_NO_NODE check for node id 2024-10-28 21:40:40 -07:00
numa.c mm: make range-to-target_node lookup facility a part of numa_memblks 2024-09-03 21:15:32 -07:00
oom_kill.c mm: move mm flags to mm_types.h 2024-11-05 16:56:26 -08:00
page_alloc.c mm/page_alloc: don't call pfn_to_page() on possibly non-existent PFN in split_large_buddy() 2024-12-18 19:04:45 -08:00
page_counter.c kernel/cgroup: Add "dmem" memory accounting cgroup 2025-01-06 17:24:38 +01:00
page_ext.c mm: don't account memmap per-node 2024-08-15 22:16:14 -07:00
page_frag_cache.c mm: page_frag: use __alloc_pages() to replace alloc_pages_node() 2024-11-11 10:56:27 -08:00
page_idle.c
page_io.c mm: add per-order mTHP swpin counters 2024-11-11 00:26:43 -08:00
page_isolation.c mm: remove migration for HugePage in isolate_single_pageblock() 2024-09-03 21:15:40 -07:00
page_owner.c mm/page-owner: use gfp_nested_mask() instead of open coded masking 2024-05-19 14:40:44 -07:00
page_poison.c mm/page_poison: replace kmap_atomic() with kmap_local_page() 2023-12-10 16:51:50 -08:00
page_reporting.c mm, treewide: rename MAX_ORDER to MAX_PAGE_ORDER 2024-01-08 15:27:15 -08:00
page_reporting.h
page_table_check.c mm/page_table_check: fix crash on ZONE_DEVICE 2024-06-15 10:43:04 -07:00
page_vma_mapped.c mm: mass constification of folio/page pointers 2024-11-07 14:38:07 -08:00
page-writeback.c fuse update for 6.13 2024-11-26 12:41:27 -08:00
pagewalk.c mm: pagewalk: add the ability to install PTEs 2024-11-11 00:26:44 -08:00
percpu-internal.h mm: remove CONFIG_MEMCG_KMEM 2024-07-10 12:14:54 -07:00
percpu-km.c
percpu-stats.c
percpu-vm.c percpu: clean up all mappings when pcpu_map_pages() fails 2024-04-25 20:55:49 -07:00
percpu.c mm: use page->private instead of page->index in percpu 2024-11-07 14:38:07 -08:00
pgalloc-track.h
pgtable-generic.c mm: add RCU annotation to pte_offset_map(_lock) 2024-12-18 19:04:43 -08:00
process_vm_access.c mm: refactor mm_access() to not return NULL 2024-11-05 16:56:23 -08:00
ptdump.c mm: ptdump: add check_wx_pages debugfs attribute 2024-02-22 10:24:47 -08:00
readahead.c mm/readahead: fix large folio support in async readahead 2024-12-30 17:59:07 -08:00
rmap.c mm: mass constification of folio/page pointers 2024-11-07 14:38:07 -08:00
rodata_test.c
secretmem.c secretmem: disable memfd_secret() if arch cannot set direct map 2024-10-09 12:47:19 -07:00
shmem_quota.c shmem_quota: build the object file conditionally to the config option 2024-09-01 20:25:45 -07:00
shmem.c mm: shmem: fix the update of 'shmem_falloc->nr_unswapped' 2024-12-30 17:59:10 -08:00
show_mem.c mm/show_mem: use str_yes_no() helper in show_free_areas() 2024-11-07 14:38:08 -08:00
shrinker_debug.c mm: shrinker: use min() to improve shrinker_debugfs_scan_write() 2024-09-03 21:15:40 -07:00
shrinker.c mm: shrinker: avoid memleak in alloc_shrinker_info 2024-10-31 20:27:04 -07:00
shuffle.c
shuffle.h mm, treewide: rename MAX_ORDER to MAX_PAGE_ORDER 2024-01-08 15:27:15 -08:00
slab_common.c slab updates for 6.13 2024-11-25 16:51:24 -08:00
slab.h mm/slub: Avoid list corruption when removing a slab from the full list 2024-11-16 21:19:39 +01:00
slub.c memcg: slub: fix SUnreclaim for post charged objects 2024-12-10 09:25:39 +01:00
sparse-vmemmap.c mm: define general function pXd_init() 2024-11-11 17:22:27 -08:00
sparse.c bootmem: stop using page->index 2024-11-07 14:38:07 -08:00
swap_cgroup.c mm: attempt to batch free swap entries for zap_pte_range() 2024-09-03 21:15:33 -07:00
swap_slots.c mm: swap: update get_swap_pages() to take folio order 2024-04-25 20:56:37 -07:00
swap_state.c mm: swap: use str_true_false() helper function 2024-11-06 20:11:14 -08:00
swap.c - The series "zram: optimal post-processing target selection" from 2024-11-23 09:58:07 -08:00
swap.h mm: fix swap_read_folio_zeromap() for large folios with partial zeromap 2024-09-17 01:07:01 -07:00
swapfile.c mm, swap: fix allocation and scanning race with swapoff 2024-11-14 15:25:07 -08:00
truncate.c - The series "zram: optimal post-processing target selection" from 2024-11-23 09:58:07 -08:00
usercopy.c
userfaultfd.c mm: remove unused hugepage for vma_alloc_folio() 2024-11-06 20:11:12 -08:00
util.c mm/util: make memdup_user_nul() similar to memdup_user() 2024-12-30 17:59:11 -08:00
vma_internal.h mm: isolate mmap internal logic to mm/vma.c 2024-11-06 20:11:19 -08:00
vma.c mm: correctly reference merged VMA 2024-12-18 19:04:42 -08:00
vma.h mm: isolate mmap internal logic to mm/vma.c 2024-11-06 20:11:19 -08:00
vmalloc.c vmalloc: fix accounting with i915 2024-12-18 19:04:45 -08:00
vmpressure.c eventfd: simplify eventfd_signal() 2023-11-28 14:08:38 +01:00
vmscan.c mm: vmscan: account for free pages to prevent infinite Loop in throttle_direct_reclaim() 2024-12-30 17:59:06 -08:00
vmstat.c vmstat: disable vmstat_work on vmstat_cpu_down_prep() 2024-12-30 17:59:10 -08:00
workingset.c mm/list_lru: simplify the list_lru walk callback function 2024-11-11 17:22:26 -08:00
z3fold.c mm/z3fold: add __percpu annotation to *unbuddied pointer in struct z3fold_pool 2024-09-01 20:25:56 -07:00
zbud.c mm: zpool: return pool size in pages 2024-04-25 20:55:48 -07:00
zpool.c mm: zpool: return pool size in pages 2024-04-25 20:55:48 -07:00
zsmalloc.c mm/zsmalloc: use memcpy_from/to_page whereever possible 2024-11-07 14:38:07 -08:00
zswap.c mm: zswap: fix race between [de]compression and CPU hotunplug 2024-12-30 17:59:09 -08:00