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Waiman Long bd0b230fe1 mm/memcg: unify swap and memsw page counters 
The swap page counter is v2 only while memsw is v1 only.  As v1 and v2
controllers cannot be active at the same time, there is no point to keep
both swap and memsw page counters in mem_cgroup.  The previous patch has
made sure that memsw page counter is updated and accessed only when in v1
code paths.  So it is now safe to alias the v1 memsw page counter to v2
swap page counter.  This saves 14 long's in the size of mem_cgroup.  This
is a saving of 112 bytes for 64-bit archs.

While at it, also document which page counters are used in v1 and/or v2.

Signed-off-by: Waiman Long <longman@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Reviewed-by: Shakeel Butt <shakeelb@google.com>
Acked-by: Michal Hocko <mhocko@suse.com>
Cc: Chris Down <chris@chrisdown.name>
Cc: Johannes Weiner <hannes@cmpxchg.org>
Cc: Roman Gushchin <guro@fb.com>
Cc: Tejun Heo <tj@kernel.org>
Cc: Vladimir Davydov <vdavydov.dev@gmail.com>
Cc: Yafang Shao <laoar.shao@gmail.com>
Link: https://lkml.kernel.org/r/20200914024452.19167-4-longman@redhat.com
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2020-10-13 18:38:30 -07:00
..
kasan
Kbuild updates for v5.9
2020-08-09 14:10:26 -07:00
backing-dev.c
bdi: replace BDI_CAP_NO_{WRITEBACK,ACCT_DIRTY} with a single flag
2020-09-24 13:43:39 -06:00
balloon_compaction.c
mm/balloon_compaction: suppress allocation warnings
2019-09-04 07:42:01 -04:00
cleancache.c
Driver Core and debugfs changes for 5.3-rc1
2019-07-12 12:24:03 -07:00
cma_debug.c
debugfs: make sure we can remove u32_array files cleanly
2020-07-10 13:54:00 -07:00
cma.c
cma: don't quit at first error when activating reserved areas
2020-08-12 10:57:57 -07:00
cma.h
mm: cma: fix the name of CMA areas
2020-08-12 10:57:57 -07:00
compaction.c
mm: replace hpage_nr_pages with thp_nr_pages
2020-08-14 19:56:56 -07:00
debug_page_ref.c
…
debug_vm_pgtable.c
Documentation/mm: add descriptions for arch page table helpers
2020-08-07 11:33:23 -07:00
debug.c
mm, dump_page: rename head_mapcount() --> head_compound_mapcount()
2020-10-13 18:38:29 -07:00
dmapool.c
mm/dmapool.c: micro-optimisation remove unnecessary branch
2020-04-07 10:43:42 -07:00
early_ioremap.c
mm/early_ioremap.c: use %pa to print resource_size_t variables
2020-01-31 10:30:38 -08:00
fadvise.c
mm, fadvise: improve the expensive remote LRU cache draining after FADV_DONTNEED
2020-10-13 18:38:29 -07:00
failslab.c
mm/failslab.c: by default, do not fail allocations with direct reclaim only
2019-07-12 11:05:43 -07:00
filemap.c
mm/filemap: fix filemap_map_pages for THP
2020-10-13 18:38:29 -07:00
frame_vector.c
mmap locking API: convert mmap_sem comments
2020-06-09 09:39:14 -07:00
frontswap.c
mm/frontswap: mark various intentional data races
2020-08-14 19:56:56 -07:00
gup_benchmark.c
mm/gup_benchmark: use pin_user_pages for FOLL_LONGTERM flag
2020-10-13 18:38:29 -07:00
gup.c
mm/gup: protect unpin_user_pages() against npages==-ERRNO
2020-10-13 18:38:29 -07:00
highmem.c
mm, x86/mm: Untangle address space layout definitions from basic pgtable type definitions
2019-12-10 10:12:55 +01:00
hmm.c
mm: do page fault accounting in handle_mm_fault
2020-08-12 10:58:02 -07:00
huge_memory.c
arm64 updates for 5.10
2020-10-12 10:00:51 -07:00
hugetlb_cgroup.c
hugetlb_cgroup: convert comma to semicolon
2020-08-21 09:52:52 -07:00
hugetlb.c
mm/hugetlb: fix a race between hugetlb sysctl handlers
2020-09-05 12:14:30 -07:00
hwpoison-inject.c
mm/hwpoison-inject: use DEFINE_DEBUGFS_ATTRIBUTE to define debugfs fops
2019-12-01 12:59:09 -08:00
init-mm.c
mmap locking API: add MMAP_LOCK_INITIALIZER
2020-06-09 09:39:14 -07:00
internal.h
i915: use find_lock_page instead of find_lock_entry
2020-10-13 18:38:29 -07:00
interval_tree.c
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 248
2019-06-19 17:09:08 +02:00
ioremap.c
mm: move p?d_alloc_track to separate header file
2020-08-07 11:33:26 -07:00
Kconfig
mm/gup_benchmark: update the documentation in Kconfig
2020-10-13 18:38:29 -07:00
Kconfig.debug
treewide: replace '---help---' in Kconfig files with 'help'
2020-06-14 01:57:21 +09:00
khugepaged.c
mm: khugepaged: recalculate min_free_kbytes after memory hotplug as expected by khugepaged
2020-10-11 10:31:11 -07:00
kmemleak.c
mm/kmemleak: rely on rcu for task stack scanning
2020-10-13 18:38:27 -07:00
ksm.c
ksm: reinstate memcg charge on copied pages
2020-09-19 13:13:38 -07:00
list_lru.c
mm/list_lru: fix a data race in list_lru_count_one
2020-08-14 19:56:57 -07:00
maccess.c
uaccess: add force_uaccess_{begin,end} helpers
2020-08-12 10:57:59 -07:00
madvise.c
mm: optimise madvise WILLNEED
2020-10-13 18:38:29 -07:00
Makefile
mm,kmemleak-test.c: move kmemleak-test.c to samples dir
2020-10-13 18:38:27 -07:00
mapping_dirty_helpers.c
mm/mapping_dirty_helpers: update huge page-table entry callbacks
2020-04-02 09:35:29 -07:00
memblock.c
mm/memblock: expose only miminal interface to add/walk physmem
2020-07-10 15:08:09 +02:00
memcontrol.c
mm/memcg: unify swap and memsw page counters
2020-10-13 18:38:30 -07:00
memfd.c
mm: page cache: store only head pages in i_pages
2019-09-24 15:54:08 -07:00
memory_hotplug.c
mm/memory_hotplug: introduce default phys_to_target_node() implementation
2020-10-13 18:38:27 -07:00
memory-failure.c
bdi: replace BDI_CAP_NO_{WRITEBACK,ACCT_DIRTY} with a single flag
2020-09-24 13:43:39 -06:00
memory.c
mm: avoid early COW write protect games during fork()
2020-10-08 10:11:32 -07:00
mempolicy.c
mm: replace hpage_nr_pages with thp_nr_pages
2020-08-14 19:56:56 -07:00
mempool.c
mm/mempool: fix a data race in mempool_free()
2020-08-14 19:56:57 -07:00
memremap.c
mm/memremap.c: convert devmap static branch to {inc,dec}
2020-10-13 18:38:30 -07:00
memtest.c
…
migrate.c
block-5.10-2020-10-12
2020-10-13 12:12:44 -07:00
mincore.c
mm: factor find_get_incore_page out of mincore_page
2020-10-13 18:38:29 -07:00
mlock.c
mlock: fix unevictable_pgs event counts on THP
2020-09-19 13:13:38 -07:00
mm_init.c
mm: adjust vm_committed_as_batch according to vm overcommit policy
2020-08-07 11:33:26 -07:00
mmap.c
block-5.10-2020-10-12
2020-10-13 12:12:44 -07:00
mmu_gather.c
mmap locking API: convert mmap_sem comments
2020-06-09 09:39:14 -07:00
mmu_notifier.c
mm: mmu_notifier: fix and extend kerneldoc
2020-08-12 10:57:57 -07:00
mmzone.c
…
mprotect.c
mm: Introduce arch_validate_flags()
2020-09-04 12:46:07 +01:00
mremap.c
mm/mremap: start addresses are properly aligned
2020-08-07 11:33:27 -07:00
msync.c
mmap locking API: use coccinelle to convert mmap_sem rwsem call sites
2020-06-09 09:39:14 -07:00
nommu.c
Fix references to nommu-mmap.rst
2020-09-24 11:03:40 -06:00
oom_kill.c
mm, oom: show process exiting information in __oom_kill_process()
2020-08-12 10:57:56 -07:00
page_alloc.c
mm: khugepaged: recalculate min_free_kbytes after memory hotplug as expected by khugepaged
2020-10-11 10:31:11 -07:00
page_counter.c
mm/page_counter: fix various data races at memsw
2020-08-14 19:56:57 -07:00
page_ext.c
mm/page_ext.c: drop pfn_present() check when onlining
2020-04-07 10:43:40 -07:00
page_idle.c
mm/page_idle.c: skip offline pages
2020-06-08 11:05:55 -07:00
page_io.c
mm/page_io.c: remove useless out label in __swap_writepage()
2020-10-13 18:38:30 -07:00
page_isolation.c
mm/memory_hotplug: drain per-cpu pages again during memory offline
2020-09-19 13:13:39 -07:00
page_owner.c
mm: rename gfpflags_to_migratetype to gfp_migratetype for same convention
2020-06-03 20:09:45 -07:00
page_poison.c
mm/page_poison.c: fix a typo in a comment
2019-09-24 15:54:08 -07:00
page_reporting.c
mm/page_reporting: add budget limit on how many pages can be reported per pass
2020-04-07 10:43:39 -07:00
page_reporting.h
mm: introduce include/linux/pgtable.h
2020-06-09 09:39:13 -07:00
page_vma_mapped.c
mm: replace hpage_nr_pages with thp_nr_pages
2020-08-14 19:56:56 -07:00
page-writeback.c
bdi: replace BDI_CAP_NO_{WRITEBACK,ACCT_DIRTY} with a single flag
2020-09-24 13:43:39 -06:00
pagewalk.c
mmap locking API: convert mmap_sem comments
2020-06-09 09:39:14 -07:00
percpu-internal.h
mm: memcg/percpu: account percpu memory to memory cgroups
2020-08-12 10:57:55 -07:00
percpu-km.c
mm: memcg/percpu: account percpu memory to memory cgroups
2020-08-12 10:57:55 -07:00
percpu-stats.c
mm: memcg/percpu: account percpu memory to memory cgroups
2020-08-12 10:57:55 -07:00
percpu-vm.c
mm: memcg/percpu: account percpu memory to memory cgroups
2020-08-12 10:57:55 -07:00
percpu.c
percpu: fix first chunk size calculation for populated bitmap
2020-09-17 17:34:39 +00:00
pgalloc-track.h
mm: move p?d_alloc_track to separate header file
2020-08-07 11:33:26 -07:00
pgtable-generic.c
mm: introduce include/linux/pgtable.h
2020-06-09 09:39:13 -07:00
process_vm_access.c
mm: remove compat_process_vm_{readv,writev}
2020-10-03 00:02:15 -04:00
ptdump.c
mmap locking API: use coccinelle to convert mmap_sem rwsem call sites
2020-06-09 09:39:14 -07:00
readahead.c
mm: use memalloc_nofs_save in readahead path
2020-06-02 10:59:07 -07:00
rmap.c
mm/rmap: fixup copying of soft dirty and uffd ptes
2020-09-05 12:14:30 -07:00
rodata_test.c
mm/rodata_test.c: fix missing function declaration
2020-08-21 09:52:53 -07:00
shmem.c
mm/shmem: return head page from find_lock_entry
2020-10-13 18:38:29 -07:00
shuffle.c
mm/shuffle: remove dynamic reconfiguration
2020-08-07 11:33:29 -07:00
shuffle.h
mm/shuffle: remove dynamic reconfiguration
2020-08-07 11:33:29 -07:00
slab_common.c
mm/slab_common.c: delete duplicated word
2020-08-12 10:57:58 -07:00
slab.c
mm/slab.c: clean code by removing redundant if condition
2020-10-13 18:38:27 -07:00
slab.h
mm: slab: rename (un)charge_slab_page() to (un)account_slab_page()
2020-08-07 11:33:25 -07:00
slob.c
mm: memcg: convert vmstat slab counters to bytes
2020-08-07 11:33:24 -07:00
slub.c
mm/slub: make add_full() condition more explicit
2020-10-13 18:38:27 -07:00
sparse-vmemmap.c
mm/sparse: only sub-section aligned range would be populated
2020-08-07 11:33:27 -07:00
sparse.c
mm/sparse: cleanup the code surrounding memory_present()
2020-08-07 11:33:27 -07:00
swap_cgroup.c
mm: memcontrol: make swap tracking an integral part of memory control
2020-06-03 20:09:48 -07:00
swap_slots.c
mm/swap_slots.c: remove always zero and unused return value of enable_swap_slots_cache()
2020-10-13 18:38:30 -07:00
swap_state.c
swap: rename SWP_FS to SWAP_FS_OPS to avoid ambiguity
2020-10-13 18:38:29 -07:00
swap.c
mm/swap.c: fix incomplete comment in lru_cache_add_inactive_or_unevictable()
2020-10-13 18:38:30 -07:00
swapfile.c
mm/swapfile.c: fix potential memory leak in sys_swapon
2020-10-13 18:38:30 -07:00
truncate.c
mm, fadvise: improve the expensive remote LRU cache draining after FADV_DONTNEED
2020-10-13 18:38:29 -07:00
usercopy.c
mm/usercopy.c: delete duplicated word
2020-08-12 10:57:58 -07:00
userfaultfd.c
mm/vmscan: protect the workingset on anonymous LRU
2020-08-12 10:57:55 -07:00
util.c
arm64: mte: Tags-aware aware memcmp_pages() implementation
2020-09-04 12:46:07 +01:00
vmacache.c
kernel: better document the use_mm/unuse_mm API contract
2020-06-10 19:14:18 -07:00
vmalloc.c
mm/vunmap: add cond_resched() in vunmap_pmd_range
2020-08-21 09:52:53 -07:00
vmpressure.c
mm: vmpressure: use mem_cgroup_is_root API
2020-04-02 09:35:31 -07:00
vmscan.c
mm: fix check_move_unevictable_pages() on THP
2020-09-19 13:13:38 -07:00
vmstat.c
Merge branch 'simplify-do_wp_page'
2020-09-04 09:31:54 -07:00
workingset.c
mm: replace hpage_nr_pages with thp_nr_pages
2020-08-14 19:56:56 -07:00
z3fold.c
mm/z3fold: silence kmemleak false positives of slots
2020-05-28 11:35:40 -07:00
zbud.c
mm: use false for bool variable
2020-06-04 19:06:24 -07:00
zpool.c
mm/zpool.c: delete duplicated word and fix grammar
2020-08-12 10:57:58 -07:00
zsmalloc.c
mm/zsmalloc.c: fix duplicated words
2020-08-12 10:57:58 -07:00
zswap.c
mm/zswap: allow setting default status, compressor and allocator in Kconfig
2020-04-07 10:43:41 -07:00