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linux/mm
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Chengming Zhou 94ace3fec8 mm/zswap: change zswap_pool kref to percpu_ref 
All zswap entries will take a reference of zswap_pool when zswap_store(),
and drop it when free.  Change it to use the percpu_ref is better for
scalability performance.

Although percpu_ref use a bit more memory which should be ok for our use
case, since we almost have only one zswap_pool to be using.  The
performance gain is for zswap_store/load hotpath.

Testing kernel build (32 threads) in tmpfs with memory.max=2GB.  (zswap
shrinker and writeback enabled with one 50GB swapfile, on a 128 CPUs
x86-64 machine, below is the average of 5 runs)

        mm-unstable  zswap-global-lru
real    63.20        63.12
user    1061.75      1062.95
sys     268.74       264.44

[chengming.zhou@linux.dev: fix zswap_pools_lock usages after changing to percpu_ref]
  Link: https://lkml.kernel.org/r/20240228154954.3028626-1-chengming.zhou@linux.dev
Link: https://lkml.kernel.org/r/20240210-zswap-global-lru-v3-2-200495333595@bytedance.com
Signed-off-by: Chengming Zhou <zhouchengming@bytedance.com>
Reviewed-by: Nhat Pham <nphamcs@gmail.com>
Cc: Johannes Weiner <hannes@cmpxchg.org>
Cc: Yosry Ahmed <yosryahmed@google.com>
Cc: Chengming Zhou <chengming.zhou@linux.dev>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
2024-03-04 17:01:13 -08:00
..
damon
mm/damon/reclaim: implement memory PSI-driven quota self-tuning
2024-02-23 17:48:30 -08:00
kasan
merge mm-hotfixes-stable into mm-nonmm-stable to pick up stackdepot changes
2024-02-23 17:28:43 -08:00
kfence
KFENCE: cleanup kfence_guarded_alloc() after CONFIG_SLAB removal
2023-12-05 11:17:58 +01:00
kmsan
mm: kmsan: remove runtime checks from kmsan_unpoison_memory()
2024-02-22 10:24:41 -08:00
backing-dev.c
blk-wbt: Fix detection of dirty-throttled tasks
2024-02-06 09:44:03 -07:00
balloon_compaction.c
mm: Convert all PageMovable users to movable_operations
2022-08-02 12:34:03 -04:00
bootmem_info.c
bootmem: use kmemleak_free_part_phys in put_page_bootmem
2023-10-25 16:47:13 -07:00
cma_debug.c
mm/cma_debug: show complete cma name in debugfs directories
2022-09-11 20:25:50 -07:00
cma_sysfs.c
mm/cma: add sysfs file 'release_pages_success'
2024-02-22 10:24:57 -08:00
cma.c
mm/cma: add sysfs file 'release_pages_success'
2024-02-22 10:24:57 -08:00
cma.h
mm/cma: add sysfs file 'release_pages_success'
2024-02-22 10:24:57 -08:00
compaction.c
mm/compaction: optimize >0 order folio compaction with free page split.
2024-02-23 17:48:33 -08:00
debug_page_alloc.c
mm, treewide: rename MAX_ORDER to MAX_PAGE_ORDER
2024-01-08 15:27:15 -08:00
debug_page_ref.c
…
debug_vm_pgtable.c
mm/debug_vm_pgtable: fix BUG_ON with pud advanced test
2024-02-23 17:27:13 -08:00
debug.c
mm: update validate_mm() to use vma iterator
2023-06-09 16:25:31 -07:00
dmapool_test.c
dmapool: add alloc/free performance test
2023-04-05 19:42:38 -07:00
dmapool.c
mm/mempool/dmapool: remove CONFIG_DEBUG_SLAB ifdefs
2023-12-05 11:17:58 +01:00
early_ioremap.c
mm/early_ioremap.c: improve the execution efficiency of early_ioremap_setup()
2023-06-09 16:25:56 -07:00
fadvise.c
mm: remove unnecessary pagevec includes
2023-06-23 16:59:31 -07:00
fail_page_alloc.c
mm: page_alloc: split out FAIL_PAGE_ALLOC
2023-06-09 16:25:23 -07:00
failslab.c
mm: fix unexpected changes to {failslab|fail_page_alloc}.attr
2022-11-22 18:50:44 -08:00
filemap.c
merge mm-hotfixes-stable into mm-nonmm-stable to pick up stackdepot changes
2024-02-23 17:28:43 -08:00
folio-compat.c
mm: remove page_add_new_anon_rmap and lru_cache_add_inactive_or_unevictable
2023-12-29 11:58:27 -08:00
gup_test.c
Merge mm-hotfixes-stable into mm-stable to pick up depended-upon changes.
2023-06-23 16:58:19 -07:00
gup_test.h
mm/gup_test: start/stop/read functionality for PIN LONGTERM test
2022-11-08 17:37:15 -08:00
gup.c
mm: convert page_try_share_anon_rmap() to folio_try_share_anon_rmap_[pte|pmd]()
2023-12-29 11:58:56 -08:00
highmem.c
x86/kexec: use pr_err() instead of kexec_dprintk() when an error occurs
2023-12-29 12:22:28 -08:00
hmm.c
mm: enable page walking API to lock vmas during the walk
2023-08-21 13:07:20 -07:00
huge_memory.c
userfaultfd: use per-vma locks in userfaultfd operations
2024-02-22 15:27:20 -08:00
hugetlb_cgroup.c
mm, hugetlb: remove HUGETLB_CGROUP_MIN_ORDER
2023-10-18 14:34:17 -07:00
hugetlb_vmemmap.c
mm: hugetlb_vmemmap: move mmap lock to vmemmap_remap_range()
2023-12-12 10:57:08 -08:00
hugetlb_vmemmap.h
mm: hugetlb_vmemmap: fix reference to nonexistent file
2023-10-25 16:47:14 -07:00
hugetlb.c
mm/hugetlb: move page order check inside hugetlb_cma_reserve()
2024-02-22 10:24:59 -08:00
hwpoison-inject.c
mm/hwpoison: add __init/__exit annotations to module init/exit funcs
2022-10-03 14:03:05 -07:00
init-mm.c
mm: Deprecate pasid field
2023-12-12 10:11:32 +01:00
internal.h
mm/compaction: add support for >0 order folio memory compaction.
2024-02-23 17:48:33 -08:00
interval_tree.c
…
io-mapping.c
…
ioremap.c
mm: ioremap: remove unneeded ioremap_allowed and iounmap_allowed
2023-08-18 10:12:36 -07:00
Kconfig
Introduce cpu_dcache_is_aliasing() across all architectures
2024-02-22 15:27:19 -08:00
Kconfig.debug
mm/slab: remove CONFIG_SLAB from all Kconfig and Makefile
2023-12-05 11:14:40 +01:00
khugepaged.c
mm/khugepaged: bypassing unnecessary scans with MMF_DISABLE_THP check
2024-02-23 17:48:25 -08:00
kmemleak.c
kmemleak: avoid RCU stalls when freeing metadata for per-CPU pointers
2023-12-12 10:57:07 -08:00
ksm.c
mm: convert page_try_share_anon_rmap() to folio_try_share_anon_rmap_[pte|pmd]()
2023-12-29 11:58:56 -08:00
list_lru.c
mm/zswap: stop lru list shrinking when encounter warm region
2024-02-22 10:24:54 -08:00
maccess.c
mm: Fix copy_from_user_nofault().
2023-04-12 17:36:23 -07:00
madvise.c
madvise:madvise_cold_or_pageout_pte_range(): allow split while folio_estimated_sharers = 0
2024-02-23 17:48:34 -08:00
Makefile
mm/slab: remove CONFIG_SLAB from all Kconfig and Makefile
2023-12-05 11:14:40 +01:00
mapping_dirty_helpers.c
mm: fix clean_record_shared_mapping_range kernel-doc
2023-08-24 16:20:30 -07:00
memblock.c
mm/memblock: add MEMBLOCK_RSRV_NOINIT into flagname[] array
2024-02-20 14:20:49 -08:00
memcontrol.c
mm: memcg: use larger batches for proactive reclaim
2024-02-22 10:24:52 -08:00
memfd.c
memfd: drop warning for missing exec-related flags
2023-10-04 10:32:22 -07:00
memory_hotplug.c
mm/memory_hotplug: export mhp_supports_memmap_on_memory()
2024-02-22 10:24:40 -08:00
memory-failure.c
mm/memory-failure: fix crash in split_huge_page_to_list from soft_offline_page
2024-02-07 21:20:34 -08:00
memory-tiers.c
mm/demotion: print demotion targets
2024-02-22 10:24:55 -08:00
memory.c
mm: add pte_batch_hint() to reduce scanning in folio_pte_batch()
2024-02-22 15:27:18 -08:00
mempolicy.c
mm/mempolicy: protect task interleave functions with tsk->mems_allowed_seq
2024-02-22 10:24:47 -08:00
mempool.c
Many singleton patches against the MM code. The patch series which
2024-01-09 11:18:47 -08:00
memremap.c
mm: remove stale example from comment
2023-12-29 11:58:26 -08:00
memtest.c
mm: memtest: convert to memtest_report_meminfo()
2023-08-21 13:37:47 -07:00
migrate_device.c
mm: convert page_try_share_anon_rmap() to folio_try_share_anon_rmap_[pte|pmd]()
2023-12-29 11:58:56 -08:00
migrate.c
merge mm-hotfixes-stable into mm-nonmm-stable to pick up stackdepot changes
2024-02-23 17:28:43 -08:00
mincore.c
mm: enable page walking API to lock vmas during the walk
2023-08-21 13:07:20 -07:00
mlock.c
mm: mlock: avoid folio_within_range() on KSM pages
2023-10-25 16:47:14 -07:00
mm_init.c
efi: disable mirror feature during crashkernel
2024-01-12 15:20:47 -08:00
mm_slot.h
mm: introduce common struct mm_slot
2022-10-03 14:02:43 -07:00
mmap_lock.c
mm: mmap_lock: fix disabling preemption directly
2021-07-23 17:43:28 -07:00
mmap.c
mm/mmap: pass vma to vma_merge()
2024-02-22 10:24:52 -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
mmu_notifiers: rename invalidate_range notifier
2023-08-18 10:12:41 -07:00
mmzone.c
zswap: shrink zswap pool based on memory pressure
2023-12-12 10:57:02 -08:00
mprotect.c
mprotect: use pfn_swap_entry_folio
2024-02-21 16:00:03 -08:00
mremap.c
mm: abstract VMA merge and extend into vma_merge_extend() helper
2023-10-18 14:34:18 -07:00
msync.c
mm/msync: use vma_find() instead of vma linked list
2022-09-26 19:46:25 -07:00
nommu.c
mm/vmalloc: remove vmap_area_list
2024-02-23 17:48:19 -08:00
oom_kill.c
mm, oom:dump_tasks add rss detailed information printing
2023-12-10 16:51:53 -08:00
page_alloc.c
mm/page_alloc: make bad_range() return bool
2024-02-23 17:48:34 -08:00
page_counter.c
mm: page_counter: remove unneeded atomic ops for low/min
2022-09-11 20:26:01 -07:00
page_ext.c
mm/page_ext: move functions around for minor cleanups to page_ext
2023-08-18 10:12:31 -07:00
page_idle.c
mm: page_idle: convert page idle to use a folio
2023-01-18 17:12:52 -08:00
page_io.c
zswap: memcontrol: implement zswap writeback disabling
2023-12-29 20:22:11 -08:00
page_isolation.c
mm, treewide: rename MAX_ORDER to MAX_PAGE_ORDER
2024-01-08 15:27:15 -08:00
page_owner.c
mm,page_owner: filter out stacks by a threshold
2024-02-23 17:48:17 -08:00
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: convert page_table_check_pte_set() to page_table_check_ptes_set()
2023-08-24 16:20:18 -07:00
page_vma_mapped.c
mm: thp: introduce multi-size THP sysfs interface
2023-12-20 14:48:12 -08:00
page-writeback.c
writeback: remove a use of write_cache_pages() from do_writepages()
2024-02-23 17:48:38 -08:00
pagewalk.c
mm: pagewalk: assert write mmap lock only for walking the user page tables
2023-12-10 16:51:53 -08:00
percpu-internal.h
percpu-internal/pcpu_chunk: re-layout pcpu_chunk structure to reduce false sharing
2023-06-19 16:19:29 -07:00
percpu-km.c
percpu: flush tlb in pcpu_reclaim_populated()
2021-07-04 18:30:17 +00:00
percpu-stats.c
mm: use vmalloc_array and vcalloc for array allocations
2022-03-08 09:30:46 -05:00
percpu-vm.c
percpu: flush tlb in pcpu_reclaim_populated()
2021-07-04 18:30:17 +00:00
percpu.c
mm: Introduce flush_cache_vmap_early()
2023-12-14 00:23:17 -08:00
pgalloc-track.h
…
pgtable-generic.c
mm/pgtable: notes on pte_offset_map[_lock]()
2023-08-18 10:12:25 -07:00
process_vm_access.c
mm: fix process_vm_rw page counts
2023-12-10 16:51:39 -08:00
ptdump.c
mm: ptdump: add check_wx_pages debugfs attribute
2024-02-22 10:24:47 -08:00
readahead.c
readahead: use ilog2 instead of a while loop in page_cache_ra_order()
2024-02-22 10:24:38 -08:00
rmap.c
rmap: replace two calls to compound_order with folio_order
2024-02-22 15:27:20 -08:00
rodata_test.c
mm/rodata_test: use PAGE_ALIGNED() helper
2022-10-03 14:03:05 -07:00
secretmem.c
mm/secretmem: use a folio in secretmem_fault()
2023-08-21 13:38:02 -07:00
shmem_quota.c
shmem: Add default quota limit mount options
2023-08-09 09:15:40 +02:00
shmem.c
shmem: properly report quota mount options
2024-02-23 17:48:34 -08:00
show_mem.c
mm, treewide: introduce NR_PAGE_ORDERS
2024-01-08 15:27:15 -08:00
shrinker_debug.c
mm: shrinker: convert shrinker_rwsem to mutex
2023-10-04 10:32:26 -07:00
shrinker.c
mm: shrinker: use kvzalloc_node() from expand_one_shrinker_info()
2024-01-05 09:58:32 -08:00
shuffle.c
mm/shuffle: convert module_param_call to module_param_cb
2022-10-03 14:03:07 -07:00
shuffle.h
mm, treewide: rename MAX_ORDER to MAX_PAGE_ORDER
2024-01-08 15:27:15 -08:00
slab_common.c
slub: use a folio in __kmalloc_large_node
2024-01-05 10:17:46 -08:00
slab.h
mm/slab: move kmalloc() functions from slab_common.c to slub.c
2023-12-06 11:57:21 +01:00
slub.c
Many singleton patches against the MM code. The patch series which
2024-01-09 11:18:47 -08:00
sparse-vmemmap.c
mm/vmemmap: allow architectures to override how vmemmap optimization works
2023-08-18 10:12:53 -07:00
sparse.c
mm/memory_hotplug: introduce MEM_PREPARE_ONLINE/MEM_FINISH_OFFLINE notifiers
2024-02-21 16:00:01 -08:00
swap_cgroup.c
mm: memcontrol: don't allocate cgroup swap arrays when memcg is disabled
2022-10-03 14:03:36 -07:00
swap_slots.c
mm/zswap: invalidate zswap entry when swap entry free
2024-02-22 10:24:54 -08:00
swap_state.c
mm/mmu_gather: add __tlb_remove_folio_pages()
2024-02-22 15:27:17 -08:00
swap.c
mm/mmu_gather: add __tlb_remove_folio_pages()
2024-02-22 15:27:17 -08:00
swap.h
mm/swap: fix race when skipping swapcache
2024-02-20 14:20:48 -08:00
swapfile.c
mm/swapfile:__swap_duplicate: drop redundant WRITE_ONCE on swap_map for err cases
2024-02-23 17:48:34 -08:00
truncate.c
fs: convert error_remove_page to error_remove_folio
2023-12-10 16:51:42 -08:00
usercopy.c
mm: Fix copy_from_user_nofault().
2023-04-12 17:36:23 -07:00
userfaultfd.c
userfaultfd: use per-vma locks in userfaultfd operations
2024-02-22 15:27:20 -08:00
util.c
mm/util: use kmap_local_page() in memcmp_pages()
2023-12-10 16:51:49 -08:00
vmalloc.c
mm: vmalloc: refactor vmalloc_dump_obj() function
2024-02-23 17:48:21 -08:00
vmpressure.c
eventfd: simplify eventfd_signal()
2023-11-28 14:08:38 +01:00
vmscan.c
mm/mglru: improve swappiness handling
2024-02-22 10:24:58 -08:00
vmstat.c
mm, treewide: rename MAX_ORDER to MAX_PAGE_ORDER
2024-01-08 15:27:15 -08:00
workingset.c
mm: ratelimit stat flush from workingset shrinker
2024-01-05 10:17:45 -08:00
z3fold.c
mm/z3fold: fix the comment for __encode_handle()
2024-02-23 17:48:31 -08:00
zbud.c
mm: zswap: remove shrink from zpool interface
2023-06-19 16:19:27 -07:00
zpool.c
mm: zswap: remove shrink from zpool interface
2023-06-19 16:19:27 -07:00
zsmalloc.c
mm/zsmalloc: remove get_zspage_mapping()
2024-02-23 17:48:32 -08:00
zswap.c
mm/zswap: change zswap_pool kref to percpu_ref
2024-03-04 17:01:13 -08:00