AcoSail/kernel_optimize_test
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e0f79b8f1f
kernel_optimize_test/mm
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Johannes Weiner e0f79b8f1f vmscan: don't accumulate scan pressure on unrelated lists 
During each reclaim scan we accumulate scan pressure on unrelated lists
which will result in bogus scans and unwanted reclaims eventually.

Scanning lists with few reclaim candidates results in a lot of rotation
and therefor also disturbs the list balancing, putting even more
pressure on the wrong lists.

In a test-case with much streaming IO, and therefor a crowded inactive
file page list, swapping started because

  a) anon pages were reclaimed after swap_cluster_max reclaim
  invocations -- nr_scan of this list has just accumulated

  b) active file pages were scanned because *their* nr_scan has also
  accumulated through the same logic.  And this in return created a
  lot of rotation for file pages and resulted in a decrease of file
  list priority, again increasing the pressure on anon pages.

The result was an evicted working set of anon pages while there were
tons of inactive file pages that should have been taken instead.

Signed-off-by: Johannes Weiner <hannes@saeurebad.de>
Reviewed-by: Rik van Riel <riel@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-10-20 08:52:31 -07:00
..
allocpercpu.c mm/allocpercpu.c: make 4 functions static 2008-07-26 12:00:12 -07:00
backing-dev.c mm: bdi: fix race in bdi_class device creation 2008-05-20 13:31:53 -07:00
bootmem.c misc: replace __FUNCTION__ with __func__ 2008-10-16 11:21:30 -07:00
bounce.c highmem: use bio_has_data() in the bounce path 2008-10-09 08:56:01 +02:00
dmapool.c dmapool: enable debugging for CONFIG_SLUB_DEBUG_ON too 2008-04-28 08:58:20 -07:00
fadvise.c Remove Andrew Morton's old email accounts 2008-10-16 11:21:32 -07:00
filemap_xip.c mm: xip/ext2 fix block allocation race 2008-08-20 15:40:32 -07:00
filemap.c vmscan: split LRU lists into anon & file sets 2008-10-20 08:50:25 -07:00
fremap.c mmap: handle mlocked pages during map, remap, unmap 2008-10-20 08:52:31 -07:00
highmem.c x86, pat: avoid highmem cache attribute aliasing 2008-08-15 17:22:57 +02:00
hugetlb.c vmscan: split LRU lists into anon & file sets 2008-10-20 08:50:25 -07:00
internal.h mlock: count attempts to free mlocked page 2008-10-20 08:52:31 -07:00
Kconfig Unevictable LRU Infrastructure 2008-10-20 08:50:26 -07:00
maccess.c kgdb: fix optional arch functions and probe_kernel_* 2008-04-17 20:05:39 +02:00
madvise.c madvise: update function comment of madvise_dontneed 2008-07-30 09:41:45 -07:00
Makefile mmu-notifiers: core 2008-07-28 16:30:21 -07:00
memcontrol.c Unevictable LRU Page Statistics 2008-10-20 08:50:26 -07:00
memory_hotplug.c vmscan: move isolate_lru_page() to vmscan.c 2008-10-20 08:50:25 -07:00
memory.c swap: cull unevictable pages in fault path 2008-10-20 08:52:31 -07:00
mempolicy.c Unevictable LRU Infrastructure 2008-10-20 08:50:26 -07:00
mempool.c spelling fixes: mm/ 2007-10-20 01:27:18 +02:00
migrate.c mlock: mlocked pages are unevictable 2008-10-20 08:52:30 -07:00
mincore.c mm: remove nopage 2008-04-28 08:58:18 -07:00
mlock.c vmstat: mlocked pages statistics 2008-10-20 08:52:31 -07:00
mm_init.c mm: mminit_loglevel cannot be __meminitdata anymore 2008-08-20 15:40:30 -07:00
mmap.c mmap: handle mlocked pages during map, remap, unmap 2008-10-20 08:52:31 -07:00
mmu_notifier.c mmu-notifiers: core 2008-07-28 16:30:21 -07:00
mmzone.c mm: mark the correct zone as full when scanning zonelists 2008-09-13 14:41:52 -07:00
mprotect.c mmu-notifiers: core 2008-07-28 16:30:21 -07:00
mremap.c mmap: handle mlocked pages during map, remap, unmap 2008-10-20 08:52:31 -07:00
msync.c Detach sched.h from mm.h 2007-05-21 09:18:19 -07:00
nommu.c mlock: mlocked pages are unevictable 2008-10-20 08:52:30 -07:00
oom_kill.c security: Fix setting of PF_SUPERPRIV by __capable() 2008-08-14 22:59:43 +10:00
page_alloc.c mlock: count attempts to free mlocked page 2008-10-20 08:52:31 -07:00
page_io.c mm: fix PageUptodate data race 2008-02-05 09:44:19 -08:00
page_isolation.c memory hotplug: missing zone->lock in test_pages_isolated() 2008-10-02 15:53:13 -07:00
page-writeback.c vmscan: split LRU lists into anon & file sets 2008-10-20 08:50:25 -07:00
pagewalk.c pagemap: pass mm into pagewalkers 2008-06-12 18:05:41 -07:00
pdflush.c Remove Andrew Morton's old email accounts 2008-10-16 11:21:32 -07:00
prio_tree.c spelling fixes: mm/ 2007-10-20 01:27:18 +02:00
quicklist.c mm: size of quicklists shouldn't be proportional to the number of CPUs 2008-09-02 19:21:38 -07:00
readahead.c vmscan: split LRU lists into anon & file sets 2008-10-20 08:50:25 -07:00
rmap.c vmscan: unevictable LRU scan sysctl 2008-10-20 08:52:31 -07:00
shmem_acl.c [PATCH] sanitize ->permission() prototype 2008-07-26 20:53:14 -04:00
shmem.c SHM_LOCKED pages are unevictable 2008-10-20 08:50:26 -07:00
slab.c mm: unexport ksize 2008-07-29 23:44:26 +03:00
slob.c SLOB: fix bogus ksize calculation fix 2008-10-09 12:18:27 -07:00
slub.c slub: fixed uninitialized counter in struct kmem_cache_node 2008-09-15 09:49:05 +03:00
sparse-vmemmap.c Christoph has moved 2008-07-04 10:40:04 -07:00
sparse.c mm/sparse.c: removed duplicated include 2008-08-12 16:07:30 -07:00
swap_state.c vmscan: add newly swapped in pages to the inactive list 2008-10-20 08:50:25 -07:00
swap.c swap: cull unevictable pages in fault path 2008-10-20 08:52:31 -07:00
swapfile.c vmscan: free swap space on swap-in/activation 2008-10-20 08:50:25 -07:00
thrash.c Bug in mm/thrash.c function grab_swap_token() 2007-05-11 08:29:32 -07:00
tiny-shmem.c mm: tiny-shmem nommu fix 2008-10-02 15:53:13 -07:00
truncate.c mmap: handle mlocked pages during map, remap, unmap 2008-10-20 08:52:31 -07:00
util.c mm: Make generic weak get_user_pages_fast and EXPORT_GPL it 2008-08-12 17:52:53 +10:00
vmalloc.c Merge branches 'x86/xen', 'x86/build', 'x86/microcode', 'x86/mm-debug-v2', 'x86/memory-corruption-check', 'x86/early-printk', 'x86/xsave', 'x86/ptrace-v2', 'x86/quirks', 'x86/setup', 'x86/spinlocks' and 'x86/signal' into x86/core-v2 2008-10-12 15:50:02 +02:00
vmscan.c vmscan: don't accumulate scan pressure on unrelated lists 2008-10-20 08:52:31 -07:00
vmstat.c mlock: count attempts to free mlocked page 2008-10-20 08:52:31 -07:00