OpenE2K
/
linux
6
0
Fork 0
Code Issues Pull Requests Releases Wiki Activity
linux/mm
History
Johannes Weiner 0bf1457f0c mm: vmscan: do not swap anon pages just because free+file is low 
Page reclaim force-scans / swaps anonymous pages when file cache drops
below the high watermark of a zone in order to prevent what little cache
remains from thrashing.

However, on bigger machines the high watermark value can be quite large
and when the workload is dominated by a static anonymous/shmem set, the
file set might just be a small window of used-once cache.  In such
situations, the VM starts swapping heavily when instead it should be
recycling the no longer used cache.

This is a longer-standing problem, but it's more likely to trigger after
commit 81c0a2bb51 ("mm: page_alloc: fair zone allocator policy")
because file pages can no longer accumulate in a single zone and are
dispersed into smaller fractions among the available zones.

To resolve this, do not force scan anon when file pages are low but
instead rely on the scan/rotation ratios to make the right prediction.

Signed-off-by: Johannes Weiner <hannes@cmpxchg.org>
Acked-by: Rafael Aquini <aquini@redhat.com>
Cc: Rik van Riel <riel@redhat.com>
Cc: Mel Gorman <mgorman@suse.de>
Cc: Hugh Dickins <hughd@google.com>
Cc: Suleiman Souhlal <suleiman@google.com>
Cc: <stable@kernel.org>		[3.12+]
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
 		2014-04-08 16:48:51 -07:00
..
Kconfig mm: create generic early_ioremap() support 2014-04-07 16:36:15 -07:00
Kconfig.debug
…
Makefile mm: create generic early_ioremap() support 2014-04-07 16:36:15 -07:00
backing-dev.c bdi: avoid oops on device removal 2014-04-03 16:20:49 -07:00
balloon_compaction.c
…
bootmem.c
…
bounce.c
…
cleancache.c
…
compaction.c mm, compaction: determine isolation mode only once 2014-04-07 16:35:55 -07:00
debug-pagealloc.c
…
dmapool.c
…
early_ioremap.c mm: create generic early_ioremap() support 2014-04-07 16:36:15 -07:00
fadvise.c
…
failslab.c
…
filemap.c memcg: rename high level charging functions 2014-04-07 16:35:57 -07:00
filemap_xip.c
…
fremap.c mm: fix bad rss-counter if remap_file_pages raced migration 2014-03-19 16:21:49 -07:00
frontswap.c
…
highmem.c
…
huge_memory.c memcg: rename high level charging functions 2014-04-07 16:35:57 -07:00
hugetlb.c mm: hugetlb: fix softlockup when a large number of hugepages are freed. 2014-04-07 16:35:58 -07:00
hugetlb_cgroup.c cgroup: drop const from @buffer of cftype->write_string() 2014-03-19 10:23:54 -04:00
hwpoison-inject.c
…
init-mm.c
…
internal.h mm/readahead.c: inline ra_submit 2014-04-07 16:35:58 -07:00
interval_tree.c
…
kmemcheck.c
…
kmemleak-test.c
…
kmemleak.c kmemleak: change some global variables to int 2014-04-03 16:20:50 -07:00
ksm.c mm: close PageTail race 2014-03-04 07:55:47 -08:00
list_lru.c mm: keep page cache radix tree nodes in check 2014-04-03 16:21:01 -07:00
maccess.c
…
madvise.c
…
memblock.c mm/memblock.c: use PFN_PHYS() 2014-04-07 16:35:58 -07:00
memcontrol.c memcg, slab: do not destroy children caches if parent has aliases 2014-04-07 16:36:13 -07:00
memory-failure.c Merge branch 'for-3.15' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/cgroup 2014-04-03 13:05:42 -07:00
memory.c mm: remove unused arg of set_page_dirty_balance() 2014-04-07 16:35:57 -07:00
memory_hotplug.c
…
mempolicy.c mm, mempolicy: remove per-process flag 2014-04-07 16:35:54 -07:00
mempool.c mempool: add unlikely and likely hints 2014-04-07 16:35:55 -07:00
migrate.c mm: fix swapops.h:131 bug if remap_file_pages raced migration 2014-03-20 22:09:09 -07:00
mincore.c mm + fs: prepare for non-page entries in page cache radix trees 2014-04-03 16:21:00 -07:00
mlock.c mm: try_to_unmap_cluster() should lock_page() before mlocking 2014-04-07 16:35:57 -07:00
mm_init.c
…
mmap.c mm: per-thread vma caching 2014-04-07 16:35:53 -07:00
mmu_context.c sched/mm: call finish_arch_post_lock_switch in idle_task_exit and use_mm 2014-02-21 08:50:17 +01:00
mmu_notifier.c
…
mmzone.c
…
mprotect.c mm: move mmu notifier call from change_protection to change_pmd_range 2014-04-07 16:35:50 -07:00
mremap.c
…
msync.c
…
nobootmem.c mm/nobootmem.c: mark function as static 2014-04-03 16:21:02 -07:00
nommu.c mm: fix 'ERROR: do not initialise globals to 0 or NULL' and coding style 2014-04-07 16:35:55 -07:00
oom_kill.c mm, oom: base root bonus on current usage 2014-01-30 16:56:56 -08:00
page-writeback.c mm: remove unused arg of set_page_dirty_balance() 2014-04-07 16:35:57 -07:00
page_alloc.c mm/page_alloc.c: change mm debug routines back to EXPORT_SYMBOL 2014-04-07 16:35:59 -07:00
page_cgroup.c mm/page_cgroup.c: mark functions as static 2014-04-03 16:21:02 -07:00
page_io.c Merge branch 'for-3.14/core' of git://git.kernel.dk/linux-block 2014-01-30 11:19:05 -08:00
page_isolation.c
…
pagewalk.c
…
percpu-km.c
…
percpu-vm.c
…
percpu.c percpu: renew the max_contig if we merge the head and previous block 2014-03-29 09:29:42 -04:00
pgtable-generic.c
…
process_vm_access.c mm/process_vm_access.c: mark function as static 2014-04-03 16:21:02 -07:00
quicklist.c
…
readahead.c mm/readahead.c: inline ra_submit 2014-04-07 16:35:58 -07:00
rmap.c mm: try_to_unmap_cluster() should lock_page() before mlocking 2014-04-07 16:35:57 -07:00
shmem.c memcg: rename high level charging functions 2014-04-07 16:35:57 -07:00
slab.c mm, mempolicy: remove per-process flag 2014-04-07 16:35:54 -07:00
slab.h memcg, slab: never try to merge memcg caches 2014-04-07 16:36:12 -07:00
slab_common.c memcg, slab: do not destroy children caches if parent has aliases 2014-04-07 16:36:13 -07:00
slob.c
…
slub.c slub: use raw_cpu_inc for incrementing statistics 2014-04-07 16:36:14 -07:00
sparse-vmemmap.c
…
sparse.c mm: use macros from compiler.h instead of __attribute__((...)) 2014-04-07 16:35:54 -07:00
swap.c mm: thrash detection-based file cache sizing 2014-04-03 16:21:01 -07:00
swap_state.c swap: add a simple detector for inappropriate swapin readahead 2014-02-06 13:48:51 -08:00
swapfile.c mm/swap: fix race on swap_info reuse between swapoff and swapon 2014-02-06 13:48:51 -08:00
truncate.c mm: keep page cache radix tree nodes in check 2014-04-03 16:21:01 -07:00
util.c mm: use macros from compiler.h instead of __attribute__((...)) 2014-04-07 16:35:54 -07:00
vmacache.c mm: per-thread vma caching 2014-04-07 16:35:53 -07:00
vmalloc.c mm/vmalloc.c: enhance vm_map_ram() comment 2014-04-07 16:35:55 -07:00
vmpressure.c arm, pm, vmpressure: add missing slab.h includes 2014-02-03 13:24:01 -05:00
vmscan.c mm: vmscan: do not swap anon pages just because free+file is low 2014-04-08 16:48:51 -07:00
vmstat.c CPU hotplug notifiers registration fixes for 3.15-rc1 2014-04-07 14:55:46 -07:00
workingset.c mm: keep page cache radix tree nodes in check 2014-04-03 16:21:01 -07:00
zbud.c
…
zsmalloc.c zsmalloc: Fix CPU hotplug callback registration 2014-03-20 13:43:45 +01:00
zswap.c Merge branch 'akpm' (incoming from Andrew) 2014-04-07 16:38:06 -07:00