Revision 4d96ba3530750fae3f3f01150adfecde96157815 authored by Roman Gushchin on 12 July 2019, 03:56:31 UTC, committed by Linus Torvalds on 12 July 2019, 18:05:44 UTC
Every slab page charged to a non-root memory cgroup has a pointer to the memory cgroup and holds a reference to it, which protects a non-empty memory cgroup from being released. At the same time the page has a pointer to the corresponding kmem_cache, and also hold a reference to the kmem_cache. And kmem_cache by itself holds a reference to the cgroup. So there is clearly some redundancy, which allows to stop setting the page->mem_cgroup pointer and rely on getting memcg pointer indirectly via kmem_cache. Further it will allow to change this pointer easier, without a need to go over all charged pages. So let's stop setting page->mem_cgroup pointer for slab pages, and stop using the css refcounter directly for protecting the memory cgroup from going away. Instead rely on kmem_cache as an intermediate object. Make sure that vmstats and shrinker lists are working as previously, as well as /proc/kpagecgroup interface. Link: http://lkml.kernel.org/r/20190611231813.3148843-10-guro@fb.com Signed-off-by: Roman Gushchin <guro@fb.com> Acked-by: Vladimir Davydov <vdavydov.dev@gmail.com> Reviewed-by: Shakeel Butt <shakeelb@google.com> Cc: Christoph Lameter <cl@linux.com> Cc: Johannes Weiner <hannes@cmpxchg.org> Cc: Michal Hocko <mhocko@suse.com> Cc: Waiman Long <longman@redhat.com> Cc: David Rientjes <rientjes@google.com> Cc: Joonsoo Kim <iamjoonsoo.kim@lge.com> Cc: Pekka Enberg <penberg@kernel.org> Cc: Andrei Vagin <avagin@gmail.com> Cc: Qian Cai <cai@lca.pw> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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Kconfig | -rw-r--r-- | 24.8 KB |
Kconfig.debug | -rw-r--r-- | 4.6 KB |
Makefile | -rw-r--r-- | 3.7 KB |
backing-dev.c | -rw-r--r-- | 27.0 KB |
balloon_compaction.c | -rw-r--r-- | 5.5 KB |
cleancache.c | -rw-r--r-- | 9.8 KB |
cma.c | -rw-r--r-- | 14.0 KB |
cma.h | -rw-r--r-- | 573 bytes |
cma_debug.c | -rw-r--r-- | 4.5 KB |
compaction.c | -rw-r--r-- | 75.0 KB |
debug.c | -rw-r--r-- | 5.9 KB |
debug_page_ref.c | -rw-r--r-- | 1.4 KB |
dmapool.c | -rw-r--r-- | 13.7 KB |
early_ioremap.c | -rw-r--r-- | 6.8 KB |
fadvise.c | -rw-r--r-- | 5.3 KB |
failslab.c | -rw-r--r-- | 1.4 KB |
filemap.c | -rw-r--r-- | 96.5 KB |
frame_vector.c | -rw-r--r-- | 6.4 KB |
frontswap.c | -rw-r--r-- | 14.2 KB |
gup.c | -rw-r--r-- | 60.9 KB |
gup_benchmark.c | -rw-r--r-- | 2.7 KB |
highmem.c | -rw-r--r-- | 11.7 KB |
hmm.c | -rw-r--r-- | 42.3 KB |
huge_memory.c | -rw-r--r-- | 82.7 KB |
hugetlb.c | -rw-r--r-- | 135.4 KB |
hugetlb_cgroup.c | -rw-r--r-- | 10.9 KB |
hwpoison-inject.c | -rw-r--r-- | 3.2 KB |
init-mm.c | -rw-r--r-- | 1.2 KB |
internal.h | -rw-r--r-- | 17.1 KB |
interval_tree.c | -rw-r--r-- | 3.1 KB |
khugepaged.c | -rw-r--r-- | 48.2 KB |
kmemleak-test.c | -rw-r--r-- | 2.6 KB |
kmemleak.c | -rw-r--r-- | 59.6 KB |
ksm.c | -rw-r--r-- | 89.5 KB |
list_lru.c | -rw-r--r-- | 14.6 KB |
maccess.c | -rw-r--r-- | 3.1 KB |
madvise.c | -rw-r--r-- | 23.0 KB |
memblock.c | -rw-r--r-- | 56.5 KB |
memcontrol.c | -rw-r--r-- | 175.2 KB |
memfd.c | -rw-r--r-- | 7.8 KB |
memory-failure.c | -rw-r--r-- | 51.9 KB |
memory.c | -rw-r--r-- | 127.1 KB |
memory_hotplug.c | -rw-r--r-- | 48.6 KB |
mempolicy.c | -rw-r--r-- | 72.4 KB |
mempool.c | -rw-r--r-- | 15.8 KB |
memtest.c | -rw-r--r-- | 2.8 KB |
migrate.c | -rw-r--r-- | 76.9 KB |
mincore.c | -rw-r--r-- | 7.5 KB |
mlock.c | -rw-r--r-- | 22.7 KB |
mm_init.c | -rw-r--r-- | 4.8 KB |
mmap.c | -rw-r--r-- | 100.2 KB |
mmu_context.c | -rw-r--r-- | 1.3 KB |
mmu_gather.c | -rw-r--r-- | 6.8 KB |
mmu_notifier.c | -rw-r--r-- | 11.7 KB |
mmzone.c | -rw-r--r-- | 2.4 KB |
mprotect.c | -rw-r--r-- | 15.6 KB |
mremap.c | -rw-r--r-- | 19.4 KB |
msync.c | -rw-r--r-- | 2.6 KB |
nommu.c | -rw-r--r-- | 47.9 KB |
oom_kill.c | -rw-r--r-- | 30.2 KB |
page-writeback.c | -rw-r--r-- | 84.7 KB |
page_alloc.c | -rw-r--r-- | 235.2 KB |
page_counter.c | -rw-r--r-- | 6.6 KB |
page_ext.c | -rw-r--r-- | 11.0 KB |
page_idle.c | -rw-r--r-- | 5.5 KB |
page_io.c | -rw-r--r-- | 10.5 KB |
page_isolation.c | -rw-r--r-- | 9.2 KB |
page_owner.c | -rw-r--r-- | 14.7 KB |
page_poison.c | -rw-r--r-- | 3.0 KB |
page_vma_mapped.c | -rw-r--r-- | 7.6 KB |
pagewalk.c | -rw-r--r-- | 8.7 KB |
percpu-internal.h | -rw-r--r-- | 6.3 KB |
percpu-km.c | -rw-r--r-- | 3.0 KB |
percpu-stats.c | -rw-r--r-- | 5.7 KB |
percpu-vm.c | -rw-r--r-- | 10.3 KB |
percpu.c | -rw-r--r-- | 92.4 KB |
pgtable-generic.c | -rw-r--r-- | 5.3 KB |
process_vm_access.c | -rw-r--r-- | 9.8 KB |
quicklist.c | -rw-r--r-- | 2.4 KB |
readahead.c | -rw-r--r-- | 16.5 KB |
rmap.c | -rw-r--r-- | 53.7 KB |
rodata_test.c | -rw-r--r-- | 1.3 KB |
shmem.c | -rw-r--r-- | 105.0 KB |
shuffle.c | -rw-r--r-- | 5.7 KB |
shuffle.h | -rw-r--r-- | 1.5 KB |
slab.c | -rw-r--r-- | 105.0 KB |
slab.h | -rw-r--r-- | 16.1 KB |
slab_common.c | -rw-r--r-- | 40.9 KB |
slob.c | -rw-r--r-- | 17.0 KB |
slub.c | -rw-r--r-- | 142.3 KB |
sparse-vmemmap.c | -rw-r--r-- | 6.6 KB |
sparse.c | -rw-r--r-- | 21.5 KB |
swap.c | -rw-r--r-- | 28.6 KB |
swap_cgroup.c | -rw-r--r-- | 5.2 KB |
swap_slots.c | -rw-r--r-- | 9.4 KB |
swap_state.c | -rw-r--r-- | 22.4 KB |
swapfile.c | -rw-r--r-- | 94.7 KB |
truncate.c | -rw-r--r-- | 26.4 KB |
usercopy.c | -rw-r--r-- | 9.3 KB |
userfaultfd.c | -rw-r--r-- | 15.8 KB |
util.c | -rw-r--r-- | 19.0 KB |
vmacache.c | -rw-r--r-- | 2.7 KB |
vmalloc.c | -rw-r--r-- | 86.7 KB |
vmpressure.c | -rw-r--r-- | 13.8 KB |
vmscan.c | -rw-r--r-- | 121.6 KB |
vmstat.c | -rw-r--r-- | 51.5 KB |
workingset.c | -rw-r--r-- | 19.2 KB |
z3fold.c | -rw-r--r-- | 39.5 KB |
zbud.c | -rw-r--r-- | 18.2 KB |
zpool.c | -rw-r--r-- | 10.7 KB |
zsmalloc.c | -rw-r--r-- | 60.4 KB |
zswap.c | -rw-r--r-- | 34.2 KB |
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