Minchan Kim e496612c51 mm: do not stall register_shrinker() ... Shakeel Butt reported he has observed in production systems that the job loader gets stuck for 10s of seconds while doing a mount operation. It turns out that it was stuck in register_shrinker() because some unrelated job was under memory pressure and was spending time in shrink_slab(). Machines have a lot of shrinkers registered and jobs under memory pressure have to traverse all of those memcg-aware shrinkers and affect unrelated jobs which want to register their own shrinkers. To solve the issue, this patch simply bails out slab shrinking if it is found that someone wants to register a shrinker in parallel. A downside is it could cause unfair shrinking between shrinkers. However, it should be rare and we can add compilcated logic if we find it's not enough. [akpm@linux-foundation.org: tweak code comment] Link: http://lkml.kernel.org/r/20171115005602.GB23810@bbox Link: http://lkml.kernel.org/r/1511481899-20335-1-git-send-email-minchan@kernel.org Signed-off-by: Minchan Kim <minchan@kernel.org> Signed-off-by: Shakeel Butt <shakeelb@google.com> Reported-by: Shakeel Butt <shakeelb@google.com> Tested-by: Shakeel Butt <shakeelb@google.com> Acked-by: Johannes Weiner <hannes@cmpxchg.org> Acked-by: Michal Hocko <mhocko@suse.com> Cc: Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp> Cc: Anshuman Khandual <khandual@linux.vnet.ibm.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>		2018-01-31 17:18:37 -08:00
..
kasan	kasan: use %px to print addresses instead of %p	2017-11-29 12:13:16 +11:00
backing-dev.c	Revert "bdi: add error handle for bdi_debug_register"	2017-12-21 10:01:30 -07:00
balloon_compaction.c	virtio_balloon: fix deadlock on OOM	2017-11-14 23:57:38 +02:00
bootmem.c	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
cleancache.c	fs: switch ->s_uuid to uuid_t	2017-06-05 16:59:12 +02:00
cma_debug.c	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
cma.c	mm/cma.c: change pr_info to pr_err for cma_alloc fail log	2017-11-15 18:21:03 -08:00
cma.h	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
compaction.c	mm, compaction: remove unneeded pageblock_skip_persistent() checks	2017-11-17 16:10:00 -08:00
debug_page_ref.c	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
debug.c	mm/debug.c: provide useful debugging information for VM_BUG	2018-01-04 16:45:09 -08:00
dmapool.c	lib/vsprintf.c: remove %Z support	2017-02-27 18:43:47 -08:00
early_ioremap.c	mm/early_ioremap: Fix boot hang with earlyprintk=efi,keep	2017-12-11 14:54:44 +01:00
fadvise.c	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
failslab.c	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
filemap.c	mm/filemap.c: remove include of hardirq.h	2018-01-31 17:18:36 -08:00
frame_vector.c	mm/frame_vector.c: release a semaphore in 'get_vaddr_frames()'	2017-12-14 16:00:48 -08:00
frontswap.c	mm, frontswap: convert frontswap_enabled to static key	2016-07-26 16:19:19 -07:00
gup_benchmark.c	mm: add infrastructure for get_user_pages_fast() benchmarking	2017-11-17 16:10:04 -08:00
gup.c	Merge branch 'work.get_user_pages_fast' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs	2018-01-31 10:01:08 -08:00
highmem.c	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
hmm.c	Revert "mm: replace p??_write with pte_access_permitted in fault + gup paths"	2017-12-15 18:53:22 -08:00
huge_memory.c	Revert "mm: replace p??_write with pte_access_permitted in fault + gup paths"	2017-12-15 18:53:22 -08:00
hugetlb_cgroup.c	mm, hugetlb_cgroup: round limit_in_bytes down to hugepage size	2016-05-20 17:58:30 -07:00
hugetlb.c	mm: show total hugetlb memory consumption in /proc/meminfo	2018-01-31 17:18:36 -08:00
hwpoison-inject.c	mm/memory_failure: Remove unused trapno from memory_failure	2018-01-23 12:17:42 -06:00
init-mm.c	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
internal.h	Revert "mm, thp: Do not make pmd/pud dirty without a reason"	2017-11-29 09:01:01 -08:00
interval_tree.c	lib/interval_tree: fast overlap detection	2017-09-08 18:26:49 -07:00
Kconfig	mm: relax deferred struct page requirements	2018-01-31 17:18:36 -08:00
Kconfig.debug	kmemcheck: rip it out	2017-11-15 18:21:05 -08:00
khugepaged.c	Revert "mm, thp: Do not make pmd/pud dirty without a reason"	2017-11-29 09:01:01 -08:00
kmemleak-test.c	mm: convert printk(KERN_<LEVEL> to pr_<level>	2016-03-17 15:09:34 -07:00
kmemleak.c	mm: kmemleak: remove unused hardirq.h	2018-01-31 17:18:36 -08:00
ksm.c	mm/ksm: Remove now-redundant smp_read_barrier_depends()	2017-12-04 10:52:56 -08:00
list_lru.c	mm/list_lru.c: mark expected switch fall-through	2017-11-15 18:21:07 -08:00
maccess.c	x86: remove more uaccess_32.h complexity	2016-05-22 17:21:27 -07:00
madvise.c	mm/memory_failure: Remove unused trapno from memory_failure	2018-01-23 12:17:42 -06:00
Makefile	mm: add infrastructure for get_user_pages_fast() benchmarking	2017-11-17 16:10:04 -08:00
memblock.c	mm: define memblock_virt_alloc_try_nid_raw	2017-11-15 18:21:05 -08:00
memcontrol.c	mm: memcontrol: fix excessive complexity in memory.stat reporting	2018-01-31 17:18:36 -08:00
memory_hotplug.c	mm: drop hotplug lock from lru_add_drain_all()	2018-01-31 17:18:36 -08:00
memory-failure.c	signal/memory-failure: Use force_sig_mceerr and send_sig_mceerr	2018-01-23 12:17:48 -06:00
memory.c	mm/memory.c: release locked page in do_swap_page()	2018-01-19 10:09:40 -08:00
mempolicy.c	mm/mempolicy: add nodes_empty check in SYSC_migrate_pages	2018-01-31 17:18:36 -08:00
mempool.c	mm/mempool.c: use kmalloc_array_node()	2017-11-15 18:21:02 -08:00
memtest.c	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
migrate.c	Revert "mm, thp: Do not make pmd/pud dirty without a reason"	2017-11-29 09:01:01 -08:00
mincore.c	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
mlock.c	mm: Eliminate cond_resched_rcu_qs() in favor of cond_resched()	2017-11-28 16:00:28 -08:00
mm_init.c	mm: convert printk(KERN_<LEVEL> to pr_<level>	2016-03-17 15:09:34 -07:00
mmap.c	mm, oom_reaper: fix memory corruption	2017-12-14 16:00:49 -08:00
mmu_context.c	sched/headers: Prepare to move the task_lock()/unlock() APIs to <linux/sched/task.h>	2017-03-02 08:42:38 +01:00
mmu_notifier.c	mm/mmu_notifier: avoid call to invalidate_range() in range_end()	2017-11-15 18:21:03 -08:00
mmzone.c	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
mprotect.c	mm/mprotect: add a cond_resched() inside change_pmd_range()	2018-01-04 16:45:09 -08:00
mremap.c	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
msync.c	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
nobootmem.c	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
nommu.c	Merge branch 'work.set_fs' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs	2017-09-14 18:13:32 -07:00
oom_kill.c	mm, oom_reaper: fix memory corruption	2017-12-14 16:00:49 -08:00
page_alloc.c	mm/page_alloc.c: fix comment in __get_free_pages()	2018-01-31 17:18:36 -08:00
page_counter.c	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
page_ext.c	mm/page_ext.c: check if page_ext is not prepared	2017-11-15 18:21:07 -08:00
page_idle.c	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
page_io.c	block: convert to bio_first_bvec_all & bio_first_page_all	2018-01-06 09:18:00 -07:00
page_isolation.c	mm: distinguish CMA and MOVABLE isolation in has_unmovable_pages()	2017-11-15 18:21:02 -08:00
page_owner.c	mm/page_owner.c: use PTR_ERR_OR_ZERO()	2018-01-31 17:18:36 -08:00
page_poison.c	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
page_vma_mapped.c	mm, page_vma_mapped: Introduce pfn_in_hpage()	2018-01-22 12:15:57 -08:00
page-writeback.c	Revert "mm/page-writeback.c: print a warning if the vm dirtiness settings are illogical"	2017-11-29 18:40:43 -08:00
pagewalk.c	mm/pagewalk.c: report holes in hugetlb ranges	2017-11-15 13:12:08 -08:00
percpu-internal.h	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
percpu-km.c	percpu: replace area map allocator with bitmap	2017-07-26 17:41:05 -04:00
percpu-stats.c	percpu: fix starting offset for chunk statistics traversal	2017-09-27 14:45:57 -07:00
percpu-vm.c	mm: remove __GFP_COLD	2017-11-15 18:21:06 -08:00
percpu.c	percpu: hack to let the CRIS architecture to boot until they clean up	2017-11-27 12:53:12 -08:00
pgtable-generic.c	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
process_vm_access.c	sched/headers: Prepare for new header dependencies before moving code to <linux/sched/mm.h>	2017-03-02 08:42:28 +01:00
quicklist.c	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
readahead.c	mm: don't cap request size based on read-ahead setting	2016-12-12 18:55:08 -08:00
rmap.c	mm: remove cold parameter from free_hot_cold_page*	2017-11-15 18:21:06 -08:00
rodata_test.c	mm: fix RODATA_TEST failure "rodata_test: test data was not read only"	2017-10-03 17:54:24 -07:00
shmem.c	Rename superblock flags (MS_xyz -> SB_xyz)	2017-11-27 13:05:09 -08:00
slab_common.c	mm/slab_common.c: make calculate_alignment() static	2018-01-31 17:18:35 -08:00
slab.c	mm/slab.c: remove redundant assignments for slab_state	2018-01-31 17:18:35 -08:00
slab.h	mm/slab_common.c: make calculate_alignment() static	2018-01-31 17:18:35 -08:00
slob.c	slab, slub, slob: add slab_flags_t	2017-11-15 18:21:01 -08:00
slub.c	slub: remove obsolete comments of put_cpu_partial()	2018-01-31 17:18:36 -08:00
sparse-vmemmap.c	mm, sparse: do not swamp log with huge vmemmap allocation failures	2017-11-15 18:21:07 -08:00
sparse.c	mm/sparse.c: wrong allocation for mem_section	2018-01-04 16:45:09 -08:00
swap_cgroup.c	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
swap_slots.c	mm/swap_slots.c: fix race conditions in swap_slots cache init	2017-11-15 18:21:03 -08:00
swap_state.c	mm: remove cold parameter for release_pages	2017-11-15 18:21:06 -08:00
swap.c	mm: drop hotplug lock from lru_add_drain_all()	2018-01-31 17:18:36 -08:00
swapfile.c	ipc, kernel, mm: annotate ->poll() instances	2017-11-27 16:20:05 -05:00
truncate.c	mm, pagevec: remove cold parameter for pagevecs	2017-11-15 18:21:06 -08:00
usercopy.c	mm/usercopy: Drop extra is_vmalloc_or_module() check	2017-04-05 12:30:18 -07:00
userfaultfd.c	userfaultfd: shmem: wire up shmem_mfill_zeropage_pte	2017-09-06 17:27:28 -07:00
util.c	new primitive: vmemdup_user()	2018-01-07 13:06:15 -05:00
vmacache.c	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
vmalloc.c	Revert "vmalloc: back off when the current task is killed"	2017-10-13 16:18:32 -07:00
vmpressure.c	mm, vmpressure: pass-through notification support	2017-07-10 16:32:31 -07:00
vmscan.c	mm: do not stall register_shrinker()	2018-01-31 17:18:37 -08:00
vmstat.c	mm, sysctl: make NUMA stats configurable	2017-11-15 18:21:07 -08:00
workingset.c	mm, truncate: do not check mapping for every page being truncated	2017-11-15 18:21:06 -08:00
z3fold.c	mm/z3fold.c: use kref to prevent page free/compact race	2017-11-17 16:10:00 -08:00
zbud.c	mm/zbud.c: use list_last_entry() instead of list_tail_entry()	2016-01-15 11:40:52 -08:00
zpool.c	mm: zsmalloc: constify struct zs_pool name	2015-11-06 17:50:42 -08:00
zsmalloc.c	mm/zsmalloc.c: include fs.h	2018-01-04 16:45:09 -08:00
zswap.c	zswap: same-filled pages handling	2018-01-31 17:18:36 -08:00