Yisheng Xie d6622f6365 mm/vmscan: more restrictive condition for retry in do_try_to_free_pages ... By reviewing code, I find that when enter do_try_to_free_pages, the may_thrash is always clear, and it will retry shrink zones to tap cgroup's reserves memory by setting may_thrash when the former shrink_zones reclaim nothing. However, when memcg is disabled or on legacy hierarchy, or there do not have any memcg protected by low limit, it should not do this useless retry at all, for we do not have any cgroup's reserves memory to tap, and we have already done hard work but made no progress, which as Michal pointed out in former version, we are trying hard to control the retry logical of page alloctor, and the current additional round of reclaim is just lame. Therefore, to avoid this unneeded retrying and make code more readable, we remove the may_thrash field in scan_control, instead, introduce memcg_low_reclaim and memcg_low_skipped, and only retry when memcg_low_skipped, by setting memcg_low_reclaim. [xieyisheng1@huawei.com: remove may_thrash field, introduce mem_cgroup_reclaim] Link: http://lkml.kernel.org/r/1490191893-5923-1-git-send-email-ysxie@foxmail.com Link: http://lkml.kernel.org/r/1490191893-5923-1-git-send-email-ysxie@foxmail.com Signed-off-by: Yisheng Xie <xieyisheng1@huawei.com> Acked-by: Michal Hocko <mhocko@suse.com> Suggested-by: Johannes Weiner <hannes@cmpxchg.org> Suggested-by: Michal Hocko <mhocko@kernel.org> Suggested-by: Shakeel Butt <shakeelb@google.com> Reviewed-by: Shakeel Butt <shakeelb@google.com> Acked-by: Johannes Weiner <hannes@cmpxchg.org> Cc: Mel Gorman <mgorman@suse.de> Cc: Vlastimil Babka <vbabka@suse.cz> Cc: Rik van Riel <riel@redhat.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>		2017-05-03 15:52:09 -07:00
..
kasan	kasan: report only the first error by default	2017-03-31 17:13:30 -07:00
backing-dev.c	bdi: Drop 'parent' argument from bdi_register[_va]()	2017-04-20 12:09:55 -06:00
balloon_compaction.c	mm: balloon: use general non-lru movable page feature	2016-07-26 16:19:19 -07:00
bootmem.c	mm/bootmem.c: cosmetic improvement of code readability	2017-02-22 16:41:29 -08:00
cleancache.c
cma_debug.c	mm: cma_alloc: allow to specify GFP mask	2017-02-24 17:46:55 -08:00
cma.c	mm: cma: print allocation failure reason and bitmap status	2017-02-24 17:46:55 -08:00
cma.h
compaction.c	mm/compaction: ignore block suitable after check large free page	2017-05-03 15:52:09 -07:00
debug_page_ref.c	mm/page_ref: add tracepoint to track down page reference manipulation	2016-03-17 15:09:34 -07:00
debug.c	mm, debug: print raw struct page data in __dump_page()	2016-12-12 18:55:08 -08:00
dmapool.c	lib/vsprintf.c: remove %Z support	2017-02-27 18:43:47 -08:00
early_ioremap.c
fadvise.c	mm: fadvise: avoid expensive remote LRU cache draining after FADV_DONTNEED	2016-12-20 09:48:46 -08:00
failslab.c
filemap.c	mm: tighten up the fault path a little	2017-05-03 15:52:09 -07:00
frame_vector.c	mm: replace get_vaddr_frames() write/force parameters with gup_flags	2016-10-19 08:11:24 -07:00
frontswap.c	mm, frontswap: convert frontswap_enabled to static key	2016-07-26 16:19:19 -07:00
gup.c	Revert "x86/mm/gup: Switch GUP to the generic get_user_page_fast() implementation"	2017-04-23 11:45:20 +02:00
highmem.c	mm/highmem: make nr_free_highpages() handles all highmem zones by itself	2016-05-19 19:12:14 -07:00
huge_memory.c	mm: reclaim MADV_FREE pages	2017-05-03 15:52:08 -07:00
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/hugetlb.c: don't call region_abort if region_chg fails	2017-03-31 17:13:30 -07:00
hwpoison-inject.c
init-mm.c	mm: Add a user_ns owner to mm_struct and fix ptrace permission checks	2016-11-22 11:49:48 -06:00
internal.h	mm: use is_migrate_highatomic() to simplify the code	2017-05-03 15:52:08 -07:00
interval_tree.c
Kconfig	mm: remove AVR32 arch special handling in mm/Kconfig	2017-05-01 09:36:31 +02:00
Kconfig.debug	mm: add arch-independent testcases for RODATA	2017-02-27 18:43:48 -08:00
khugepaged.c	mm: do not use double negation for testing page flags	2017-05-03 15:52:09 -07:00
kmemcheck.c	mm: convert printk(KERN_<LEVEL> to pr_<level>	2016-03-17 15:09:34 -07:00
kmemleak-test.c	mm: convert printk(KERN_<LEVEL> to pr_<level>	2016-03-17 15:09:34 -07:00
kmemleak.c	mm: fix section name for .data..ro_after_init	2017-03-31 17:13:30 -07:00
ksm.c	sched/headers: Prepare for new header dependencies before moving code to <linux/sched/coredump.h>	2017-03-02 08:42:28 +01:00
list_lru.c	mm/list_lru.c: avoid error-path NULL pointer deref	2016-10-27 18:43:42 -07:00
maccess.c	x86: remove more uaccess_32.h complexity	2016-05-22 17:21:27 -07:00
madvise.c	mm: enable MADV_FREE for swapless system	2017-05-03 15:52:08 -07:00
Makefile	mm: add arch-independent testcases for RODATA	2017-02-27 18:43:48 -08:00
memblock.c	mm/memblock.c: fix memblock_next_valid_pfn()	2017-03-09 17:01:10 -08:00
memcontrol.c	mm: memcontrol: provide shmem statistics	2017-05-03 15:52:08 -07:00
memory_hotplug.c	mm, vmscan: prevent kswapd sleeping prematurely due to mismatched classzone_idx	2017-05-03 15:52:09 -07:00
memory-failure.c	mm: delete unnecessary TTU_* flags	2017-05-03 15:52:08 -07:00
memory.c	Merge branch 'parisc-4.11-3' of git://git.kernel.org/pub/scm/linux/kernel/git/deller/parisc-linux into uaccess.parisc	2017-04-02 10:33:48 -04:00
mempolicy.c	mm/mempolicy.c: fix error handling in set_mempolicy and mbind.	2017-04-08 10:57:55 -07:00
mempool.c	Revert "mm, mempool: only set __GFP_NOMEMALLOC if there are free elements"	2016-07-28 16:07:41 -07:00
memtest.c
migrate.c	mm: don't assume anonymous pages have SwapBacked flag	2017-05-03 15:52:08 -07:00
mincore.c	mm: remove shmem_mapping() shmem_zero_setup() duplicates	2017-02-24 17:46:56 -08:00
mlock.c	Merge branch 'prep-for-5level'	2017-03-10 08:59:07 -08:00
mm_init.c	mm: convert printk(KERN_<LEVEL> to pr_<level>	2016-03-17 15:09:34 -07:00
mmap.c	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs	2017-03-02 15:20:00 -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	sched/headers: Prepare for new header dependencies before moving code to <linux/sched/mm.h>	2017-03-02 08:42:28 +01:00
mmzone.c	mm/mmzone.c: swap likely to unlikely as code logic is different for next_zones_zonelist()	2017-02-22 16:41:29 -08:00
mprotect.c	mm: convert generic code to 5-level paging	2017-03-09 11:48:47 -08:00
mremap.c	mm: convert generic code to 5-level paging	2017-03-09 11:48:47 -08:00
msync.c
nobootmem.c	mm: kmemleak: avoid using __va() on addresses that don't have a lowmem mapping	2016-10-11 15:06:33 -07:00
nommu.c	Merge branch 'WIP.sched-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip	2017-03-03 10:16:38 -08:00
oom_kill.c	sched/headers: Prepare for new header dependencies before moving code to <linux/sched/task.h>	2017-03-02 08:42:35 +01:00
page_alloc.c	mm: page_alloc: __GFP_NOWARN shouldn't suppress stall warnings	2017-05-03 15:52:09 -07:00
page_counter.c
page_ext.c	mm/page_ext: support extra space allocation by page_ext user	2016-10-07 18:46:27 -07:00
page_idle.c	mm: fix handling PTE-mapped THPs in page_idle_clear_pte_refs()	2017-02-24 17:46:55 -08:00
page_io.c	writeback: add wbc_to_write_flags()	2016-11-02 10:24:03 -06:00
page_isolation.c	mm: use is_migrate_isolate_page() to simplify the code	2017-05-03 15:52:08 -07:00
page_owner.c	mm/page_owner: don't define fields on struct page_ext by hard-coding	2016-10-07 18:46:27 -07:00
page_poison.c	mm: check the return value of lookup_page_ext for all call sites	2016-06-03 15:06:22 -07:00
page_vma_mapped.c	mm: fix page_vma_mapped_walk() for ksm pages	2017-04-08 00:47:48 -07:00
page-writeback.c	mm/page-writeback.c: use setup_deferrable_timer	2017-05-03 15:52:08 -07:00
pagewalk.c	mm: convert generic code to 5-level paging	2017-03-09 11:48:47 -08:00
percpu-km.c	mm: percpu: use pr_fmt to prefix output	2016-03-17 15:09:34 -07:00
percpu-vm.c	percpu: remove unused chunk_alloc parameter from pcpu_get_pages()	2017-03-06 15:56:55 -05:00
percpu.c	Merge branch 'sched/core' into locking/core	2017-04-04 11:31:12 +02:00
pgtable-generic.c	mm: convert generic code to 5-level paging	2017-03-09 11:48:47 -08:00
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	fix Christoph's email addresses	2016-03-17 15:09:34 -07:00
readahead.c	mm: don't cap request size based on read-ahead setting	2016-12-12 18:55:08 -08:00
rmap.c	mm: fix lazyfree BUG_ON check in try_to_unmap_one()	2017-05-03 15:52:08 -07:00
rodata_test.c	mm: remove rodata_test_data export, add pr_fmt	2017-05-03 15:52:09 -07:00
shmem.c	Merge branch 'rebased-statx' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs	2017-03-03 11:38:56 -08:00
slab_common.c	kasan: drain quarantine of memcg slab objects	2017-02-24 17:46:56 -08:00
slab.c	slab: avoid IPIs when creating kmem caches	2017-05-03 15:52:07 -07:00
slab.h	slab: remove synchronous synchronize_sched() from memcg cache deactivation path	2017-02-22 16:41:27 -08:00
slob.c	slab: introduce __kmemcg_cache_deactivate()	2017-02-22 16:41:27 -08:00
slub.c	slub: make sysfs directories for memcg sub-caches optional	2017-02-22 16:41:27 -08:00
sparse-vmemmap.c	mm: convert generic code to 5-level paging	2017-03-09 11:48:47 -08:00
sparse.c	mm/sparse: refine usemap_size() a little	2017-05-03 15:52:09 -07:00
swap_cgroup.c	mm, swap_cgroup: reschedule when neeed in swap_cgroup_swapoff()	2017-04-08 00:47:49 -07:00
swap_slots.c	mm, swap: Remove WARN_ON_ONCE() in free_swap_slot()	2017-03-21 14:13:19 -07:00
swap_state.c	mm/swap: skip readahead only when swap slot cache is enabled	2017-02-22 16:41:30 -08:00
swap.c	mm: move MADV_FREE pages into LRU_INACTIVE_FILE list	2017-05-03 15:52:08 -07:00
swapfile.c	mm, swap: Fix a race in free_swap_and_cache()	2017-05-03 15:52:08 -07:00
truncate.c	fs: add i_blocksize()	2017-02-27 18:43:46 -08:00
usercopy.c	mm/usercopy: Drop extra is_vmalloc_or_module() check	2017-04-05 12:30:18 -07:00
userfaultfd.c	mm: convert generic code to 5-level paging	2017-03-09 11:48:47 -08:00
util.c	sched/headers: Prepare for new header dependencies before moving code to <linux/sched/task_stack.h>	2017-03-02 08:42:36 +01:00
vmacache.c	sched/headers: Prepare to move 'init_task' and 'init_thread_union' from <linux/sched.h> to <linux/sched/task.h>	2017-03-02 08:42:38 +01:00
vmalloc.c	A reasonably busy cycle for documentation this time around. There is a new	2017-05-02 10:21:17 -07:00
vmpressure.c	mm: vmpressure: fix sending wrong events on underflow	2017-02-24 17:46:56 -08:00
vmscan.c	mm/vmscan: more restrictive condition for retry in do_try_to_free_pages	2017-05-03 15:52:09 -07:00
vmstat.c	mm, vmstat: suppress pcp stats for unpopulated zones in zoneinfo	2017-05-03 15:52:08 -07:00
workingset.c	mm: workingset: fix premature shadow node shrinking with cgroups	2017-03-31 17:13:30 -07:00
z3fold.c	z3fold: fix page locking in z3fold_alloc()	2017-04-13 18:24:20 -07:00
zbud.c
zpool.c
zsmalloc.c	zsmalloc: expand class bit	2017-04-13 18:24:21 -07:00
zswap.c	zswap: don't param_set_charp while holding spinlock	2017-02-27 18:43:45 -08:00