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a2d7f8e461
linux/mm
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Johannes Weiner a2d7f8e461 mm: don't avoid high-priority reclaim on unreclaimable nodes 
Commit 246e87a939 ("memcg: fix get_scan_count() for small targets")
sought to avoid high reclaim priorities for kswapd by forcing it to scan
a minimum amount of pages when lru_pages >> priority yielded nothing.

Commit b95a2f2d48 ("mm: vmscan: convert global reclaim to per-memcg
LRU lists"), due to switching global reclaim to a round-robin scheme
over all cgroups, had to restrict this forceful behavior to
unreclaimable zones in order to prevent massive overreclaim with many
cgroups.

The latter patch effectively neutered the behavior completely for all
but extreme memory pressure.  But in those situations we might as well
drop the reclaimers to lower priority levels.  Remove the check.

Link: http://lkml.kernel.org/r/20170228214007.5621-6-hannes@cmpxchg.org
Signed-off-by: Johannes Weiner <hannes@cmpxchg.org>
Acked-by: Hillf Danton <hillf.zj@alibaba-inc.com>
Acked-by: Michal Hocko <mhocko@suse.com>
Cc: Jia He <hejianet@gmail.com>
Cc: Mel Gorman <mgorman@suse.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2017-05-03 15:52:08 -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
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 sched/headers: Prepare to move signal wakeup & sigpending methods from <linux/sched.h> into <linux/sched/signal.h> 2017-03-02 08:42:32 +01:00
debug_page_ref.c
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 Merge branch 'work.iov_iter' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs 2017-05-02 11:18:50 -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
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
huge_memory.c thp: fix MADV_DONTNEED vs. MADV_FREE race 2017-04-13 18:24:21 -07:00
hugetlb_cgroup.c
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: fix 100% CPU kswapd busyloop on unreclaimable nodes 2017-05-03 15:52:07 -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 sched/headers: Prepare for new header dependencies before moving code to <linux/sched/coredump.h> 2017-03-02 08:42:28 +01:00
kmemcheck.c
kmemleak-test.c
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
madvise.c userfaultfd: non-cooperative: userfaultfd_remove revalidate vma in MADV_DONTNEED 2017-03-09 17:01:10 -08:00
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: do not call mem_cgroup_free() from within mem_cgroup_alloc() 2017-03-09 17:01:10 -08:00
memory_hotplug.c mm: add private lock to serialize memory hotplug operations 2017-03-16 16:56:18 -07:00
memory-failure.c sched/headers: Prepare for new header dependencies before moving code to <linux/sched/task.h> 2017-03-02 08:42:35 +01:00
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
memtest.c
migrate.c mm: remove unnecessary reclaimability check from NUMA balancing target 2017-05-03 15:52:07 -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
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: fix 100% CPU kswapd busyloop on unreclaimable nodes 2017-05-03 15:52:07 -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, page_alloc: avoid page_to_pfn() when merging buddies 2017-02-22 16:41:27 -08:00
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
page_vma_mapped.c mm: fix page_vma_mapped_walk() for ksm pages 2017-04-08 00:47:48 -07:00
page-writeback.c sched/headers: Prepare for the reduction of <linux/sched.h>'s signal API dependency 2017-03-02 08:42:37 +01:00
pagewalk.c mm: convert generic code to 5-level paging 2017-03-09 11:48:47 -08:00
percpu-km.c
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
readahead.c mm: don't cap request size based on read-ahead setting 2016-12-12 18:55:08 -08:00
rmap.c mm: rmap: fix huge file mmap accounting in the memcg stats 2017-03-31 17:13:30 -07:00
rodata_test.c mm: add arch-independent testcases for RODATA 2017-02-27 18:43:48 -08:00
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/memory_hotplug: set magic number to page->freelist instead of page->lru.next 2017-02-22 16:41:29 -08:00
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 Merge branch 'x86-mm-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2017-05-01 23:54:56 -07:00
swapfile.c mm: convert generic code to 5-level paging 2017-03-09 11:48:47 -08:00
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: don't avoid high-priority reclaim on unreclaimable nodes 2017-05-03 15:52:08 -07:00
vmstat.c mm: fix 100% CPU kswapd busyloop on unreclaimable nodes 2017-05-03 15:52:07 -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