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Roman Gushchin c7094406fc mm: memcg/slab: deprecate slab_root_caches 
Currently there are two lists of kmem_caches:
1) slab_caches, which contains all kmem_caches,
2) slab_root_caches, which contains only root kmem_caches.

And there is some preprocessor magic to have a single list if
CONFIG_MEMCG_KMEM isn't enabled.

It was required earlier because the number of non-root kmem_caches was
proportional to the number of memory cgroups and could reach really big
values.  Now, when it cannot exceed the number of root kmem_caches, there
is really no reason to maintain two lists.

We never iterate over the slab_root_caches list on any hot paths, so it's
perfectly fine to iterate over slab_caches and filter out non-root
kmem_caches.

It allows to remove a lot of config-dependent code and two pointers from
the kmem_cache structure.

Signed-off-by: Roman Gushchin <guro@fb.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Reviewed-by: Vlastimil Babka <vbabka@suse.cz>
Reviewed-by: Shakeel Butt <shakeelb@google.com>
Cc: Christoph Lameter <cl@linux.com>
Cc: Johannes Weiner <hannes@cmpxchg.org>
Cc: Michal Hocko <mhocko@kernel.org>
Cc: Tejun Heo <tj@kernel.org>
Link: http://lkml.kernel.org/r/20200623174037.3951353-16-guro@fb.com
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2020-08-07 11:33:25 -07:00
..
kasan
mm: remove __ARCH_HAS_5LEVEL_HACK and include/asm-generic/5level-fixup.h
2020-06-04 19:06:21 -07:00
backing-dev.c
writeback: remove struct bdi_writeback_congested
2020-07-08 17:05:53 -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
mm/cma.c: use exact_nid true to fix possible per-numa cma leak
2020-07-03 16:15:25 -07:00
cma.h
debugfs: make sure we can remove u32_array files cleanly
2020-07-10 13:54:00 -07:00
compaction.c
mm, compaction: make capture control handling safe wrt interrupts
2020-06-26 00:27:36 -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: do not crash with bad compound_mapcount()
2020-08-07 11:33:23 -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: return void from various readahead functions
2020-06-02 10:59:06 -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: add missing FGP_ flags in kerneldoc comment for pagecache_get_page
2020-08-07 11:33:23 -07:00
frame_vector.c
mmap locking API: convert mmap_sem comments
2020-06-09 09:39:14 -07:00
frontswap.c
treewide: Remove uninitialized_var() usage
2020-07-16 12:35:15 -07:00
gup_benchmark.c
mm/gup_benchmark: support pin_user_pages() and related calls
2020-04-02 09:35:27 -07:00
gup.c
mm/gup.c: fix the comment of return value for populate_vma_page_range()
2020-08-07 11:33:23 -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/hmm: provide the page mapping order in hmm_range_fault()
2020-07-10 16:24:28 -03:00
huge_memory.c
mmap locking API: convert mmap_sem comments
2020-06-09 09:39:14 -07:00
hugetlb_cgroup.c
mm: use fallthrough;
2020-04-07 10:43:41 -07:00
hugetlb.c
mm/hugetlb: avoid hardcoding while checking if cma is enabled
2020-07-24 12:42:41 -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
mmap locking API: convert mmap_sem comments
2020-06-09 09:39:14 -07:00
interval_tree.c
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 248
2019-06-19 17:09:08 +02:00
Kconfig
docs: move nommu-mmap.txt to admin-guide and rename to ReST
2020-06-26 11:33:35 -06:00
Kconfig.debug
treewide: replace '---help---' in Kconfig files with 'help'
2020-06-14 01:57:21 +09:00
khugepaged.c
khugepaged: fix null-pointer dereference due to race
2020-07-24 12:42:41 -07:00
kmemleak-test.c
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 333
2019-06-05 17:37:06 +02:00
kmemleak.c
mm/kmemleak.c: use address-of operator on section symbols
2020-04-02 09:35:26 -07:00
ksm.c
treewide: Remove uninitialized_var() usage
2020-07-16 12:35:15 -07:00
list_lru.c
mm/list_lru.c: Rename kvfree_rcu() to local variant
2020-06-29 11:59:25 -07:00
maccess.c
maccess: rename probe_user_{read,write} to copy_{from,to}_user_nofault
2020-06-17 10:57:41 -07:00
madvise.c
mmap locking API: convert mmap_sem comments
2020-06-09 09:39:14 -07:00
Makefile
The Kernel Concurrency Sanitizer (KCSAN)
2020-06-11 18:55:43 -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/slab: remove memcg_kmem_get_cache()
2020-08-07 11:33:25 -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.c: fix false softlockup during pfn range removal
2020-06-26 00:27:38 -07:00
memory-failure.c
mm/memory-failure: send SIGBUS(BUS_MCEERR_AR) only to current thread
2020-06-11 18:17:47 -07:00
memory.c
Remove uninitialized_var() macro for v5.9-rc1
2020-08-04 13:49:43 -07:00
mempolicy.c
treewide: Remove uninitialized_var() usage
2020-07-16 12:35:15 -07:00
mempool.c
…
memremap.c
mm/memremap: set caching mode for PCI P2PDMA memory to WC
2020-04-10 15:36:21 -07:00
memtest.c
…
migrate.c
mm/migrate: fix migrate_pgmap_owner w/o CONFIG_MMU_NOTIFIER
2020-08-07 11:33:21 -07:00
mincore.c
mmap locking API: use coccinelle to convert mmap_sem rwsem call sites
2020-06-09 09:39:14 -07:00
mlock.c
mmap locking API: convert mmap_sem comments
2020-06-09 09:39:14 -07:00
mm_init.c
mm/mm_init.c: report kasan-tag information stored in page->flags
2020-06-02 10:59:12 -07:00
mmap.c
Merge branch 'for-mingo' of git://git.kernel.org/pub/scm/linux/kernel/git/paulmck/linux-rcu into core/rcu
2020-07-31 00:15:53 +02:00
mmu_gather.c
mmap locking API: convert mmap_sem comments
2020-06-09 09:39:14 -07:00
mmu_notifier.c
mmap locking API: convert mmap_sem comments
2020-06-09 09:39:14 -07:00
mmzone.c
…
mprotect.c
mmap locking API: convert mmap_sem comments
2020-06-09 09:39:14 -07:00
mremap.c
mm: document warning in move_normal_pmd() and make it warn only once
2020-07-13 11:37:39 -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
It's been a busy cycle for documentation - hopefully the busiest for a
2020-08-04 22:47:54 -07:00
oom_kill.c
mm: memcg: convert vmstat slab counters to bytes
2020-08-07 11:33:24 -07:00
page_alloc.c
mm: memcg: convert vmstat slab counters to bytes
2020-08-07 11:33:24 -07:00
page_counter.c
mm, memcg: prevent memory.min load/store tearing
2020-04-02 09:35:29 -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: use blk_io_schedule() for avoiding task hung in sync io
2020-08-07 11:33:24 -07:00
page_isolation.c
mm: Allow to offline unmovable PageOffline() pages via MEM_GOING_OFFLINE
2020-06-04 15:36:52 -04:00
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/page_vma_mapped.c: explicitly compare pfn for normal, hugetlbfs and THP page
2020-01-31 10:30:38 -08:00
page-writeback.c
mm/page-writeback: fix a typo in comment "effictive"->"effective"
2020-06-04 19:06:24 -07:00
pagewalk.c
mmap locking API: convert mmap_sem comments
2020-06-09 09:39:14 -07:00
percpu-internal.h
…
percpu-km.c
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 428
2019-06-05 17:37:16 +02:00
percpu-stats.c
percpu: update copyright emails to dennis@kernel.org
2020-04-01 10:09:12 -07:00
percpu-vm.c
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 428
2019-06-05 17:37:16 +02:00
percpu.c
treewide: Remove uninitialized_var() usage
2020-07-16 12:35:15 -07:00
pgtable-generic.c
mm: introduce include/linux/pgtable.h
2020-06-09 09:39:13 -07:00
process_vm_access.c
mmap locking API: use coccinelle to convert mmap_sem rwsem call sites
2020-06-09 09:39:14 -07:00
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
mmap locking API: convert mmap_sem comments
2020-06-09 09:39:14 -07:00
rodata_test.c
maccess: rename probe_kernel_{read,write} to copy_{from,to}_kernel_nofault
2020-06-17 10:57:41 -07:00
shmem.c
tmpfs: support 64-bit inums per-sb
2020-08-07 11:33:24 -07:00
shuffle.c
mm/shuffle: don't move pages between zones and don't read garbage memmaps
2020-08-07 11:33:21 -07:00
shuffle.h
mm: adjust shuffle code to allow for future coalescing
2020-04-07 10:43:38 -07:00
slab_common.c
mm: memcg/slab: deprecate slab_root_caches
2020-08-07 11:33:25 -07:00
slab.c
mm: memcg/slab: deprecate slab_root_caches
2020-08-07 11:33:25 -07:00
slab.h
mm: memcg/slab: deprecate slab_root_caches
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: memcg/slab: deprecate slab_root_caches
2020-08-07 11:33:25 -07:00
sparse-vmemmap.c
mm: don't include asm/pgtable.h if linux/mm.h is already included
2020-06-09 09:39:13 -07:00
sparse.c
mm: don't include asm/pgtable.h if linux/mm.h is already included
2020-06-09 09:39:13 -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 redundant check for swap_slot_cache_initialized
2020-08-07 11:33:24 -07:00
swap_state.c
mm: swap: fix kerneldoc of swap_vma_readahead()
2020-08-07 11:33:24 -07:00
swap.c
treewide: Remove uninitialized_var() usage
2020-07-16 12:35:15 -07:00
swapfile.c
block: remove the bd_queue field from struct block_device
2020-07-01 08:08:20 -06:00
truncate.c
mm/thp: allow dropping THP from page cache
2019-10-19 06:32:33 -04:00
usercopy.c
usercopy: Avoid HIGHMEM pfn warning
2019-09-17 15:20:17 -07:00
userfaultfd.c
mmap locking API: convert mmap_sem comments
2020-06-09 09:39:14 -07:00
util.c
mmap locking API: convert mmap_sem comments
2020-06-09 09:39:14 -07:00
vmacache.c
kernel: better document the use_mm/unuse_mm API contract
2020-06-10 19:14:18 -07:00
vmalloc.c
mm: remove vmalloc_exec
2020-06-26 00:27:38 -07:00
vmpressure.c
mm: vmpressure: use mem_cgroup_is_root API
2020-04-02 09:35:31 -07:00
vmscan.c
mm: memcg: convert vmstat slab counters to bytes
2020-08-07 11:33:24 -07:00
vmstat.c
mm: memcg: prepare for byte-sized vmstat items
2020-08-07 11:33:24 -07:00
workingset.c
mm: memcg: convert vmstat slab counters to bytes
2020-08-07 11:33:24 -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
zpool: add malloc_support_movable to zpool_driver
2019-09-24 15:54:12 -07:00
zsmalloc.c
mm: reorder includes after introduction of linux/pgtable.h
2020-06-09 09:39:13 -07:00
zswap.c
mm/zswap: allow setting default status, compressor and allocator in Kconfig
2020-04-07 10:43:41 -07:00