Jann Horn c8c01da728 mm, slub: consider rest of partial list if acquire_slab() fails ... commit 8ff60eb052eeba95cfb3efe16b08c9199f8121cf upstream. acquire_slab() fails if there is contention on the freelist of the page (probably because some other CPU is concurrently freeing an object from the page). In that case, it might make sense to look for a different page (since there might be more remote frees to the page from other CPUs, and we don't want contention on struct page). However, the current code accidentally stops looking at the partial list completely in that case. Especially on kernels without CONFIG_NUMA set, this means that get_partial() fails and new_slab_objects() falls back to new_slab(), allocating new pages. This could lead to an unnecessary increase in memory fragmentation. Link: https://lkml.kernel.org/r/20201228130853.1871516-1-jannh@google.com Fixes: 7ced371971 ("slub: Acquire_slab() avoid loop") Signed-off-by: Jann Horn <jannh@google.com> Acked-by: David Rientjes <rientjes@google.com> Acked-by: Joonsoo Kim <iamjoonsoo.kim@lge.com> Cc: Christoph Lameter <cl@linux.com> Cc: Pekka Enberg <penberg@kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>		2021-01-19 18:27:32 +01:00
..
kasan	kasan: fix object remaining in offline per-cpu quarantine	2020-12-11 14:02:14 -08:00
backing-dev.c
balloon_compaction.c
cleancache.c
cma_debug.c
cma.c
cma.h
compaction.c
debug_page_ref.c
debug_vm_pgtable.c
debug.c
dmapool.c
early_ioremap.c
fadvise.c
failslab.c
filemap.c	revert "mm/filemap: add static for function __add_to_page_cache_locked"	2020-12-11 14:02:14 -08:00
frame_vector.c
frontswap.c
gup_benchmark.c
gup.c	mm/gup: combine put_compound_head() and unpin_user_page()	2020-12-30 11:53:54 +01:00
highmem.c
hmm.c
huge_memory.c	mm/rmap: always do TTU_IGNORE_ACCESS	2020-12-30 11:53:55 +01:00
hugetlb_cgroup.c	hugetlb_cgroup: fix offline of hugetlb cgroup with reservations	2020-12-06 10:19:07 -08:00
hugetlb.c	mm/hugetlb: fix potential missing huge page size info	2021-01-19 18:27:21 +01:00
hwpoison-inject.c
init-mm.c	mm/gup: prevent gup_fast from racing with COW during fork	2020-12-30 11:53:54 +01:00
internal.h
interval_tree.c
ioremap.c
Kconfig	mm/zsmalloc.c: drop ZSMALLOC_PGTABLE_MAPPING	2020-12-06 10:19:07 -08:00
Kconfig.debug
khugepaged.c
kmemleak.c
ksm.c
list_lru.c
maccess.c
madvise.c	mm,memory_failure: always pin the page in madvise_inject_error	2020-12-30 11:53:55 +01:00
Makefile
mapping_dirty_helpers.c
memblock.c
memcontrol.c	mm: memcg/slab: fix use after free in obj_cgroup_charge	2020-12-30 11:53:54 +01:00
memfd.c
memory_hotplug.c	mm: memmap defer init doesn't work as expected	2021-01-06 14:56:50 +01:00
memory-failure.c	mm,memory_failure: always pin the page in madvise_inject_error	2020-12-30 11:53:55 +01:00
memory.c	mm/gup: prevent gup_fast from racing with COW during fork	2020-12-30 11:53:54 +01:00
mempolicy.c
mempool.c
memremap.c
memtest.c
migrate.c	mm/rmap: always do TTU_IGNORE_ACCESS	2020-12-30 11:53:55 +01:00
mincore.c
mlock.c
mm_init.c
mmap.c	mm/mmap.c: fix mmap return value when vma is merged after call_mmap()	2020-12-06 10:19:07 -08:00
mmu_gather.c
mmu_notifier.c
mmzone.c
mprotect.c
mremap.c
msync.c
nommu.c
oom_kill.c
page_alloc.c	mm: memmap defer init doesn't work as expected	2021-01-06 14:56:50 +01:00
page_counter.c
page_ext.c
page_idle.c
page_io.c
page_isolation.c
page_owner.c
page_poison.c
page_reporting.c
page_reporting.h
page_vma_mapped.c
page-writeback.c	mm: make wait_on_page_writeback() wait for multiple pending writebacks	2021-01-12 20:18:22 +01:00
pagewalk.c
percpu-internal.h
percpu-km.c
percpu-stats.c
percpu-vm.c
percpu.c
pgalloc-track.h
pgtable-generic.c
process_vm_access.c	mm/process_vm_access.c: include compat.h	2021-01-19 18:27:21 +01:00
ptdump.c
readahead.c
rmap.c	mm/rmap: always do TTU_IGNORE_ACCESS	2020-12-30 11:53:55 +01:00
rodata_test.c
shmem.c
shuffle.c
shuffle.h
slab_common.c
slab.c
slab.h
slob.c
slub.c	mm, slub: consider rest of partial list if acquire_slab() fails	2021-01-19 18:27:32 +01:00
sparse-vmemmap.c
sparse.c
swap_cgroup.c
swap_slots.c
swap_state.c
swap.c
swapfile.c	mm/swapfile: do not sleep with a spin lock held	2020-12-06 10:19:07 -08:00
truncate.c
usercopy.c
userfaultfd.c
util.c
vmacache.c
vmalloc.c	mm/vmalloc.c: fix potential memory leak	2021-01-19 18:27:21 +01:00
vmpressure.c
vmscan.c	mm: don't put pinned pages into the swap cache	2021-01-19 18:27:29 +01:00
vmstat.c
workingset.c
z3fold.c	z3fold: stricter locking and more careful reclaim	2020-12-30 11:54:10 +01:00
zbud.c
zpool.c
zsmalloc.c	mm/zsmalloc.c: drop ZSMALLOC_PGTABLE_MAPPING	2020-12-06 10:19:07 -08:00
zswap.c