Wu Fengguang 3eb4140f03 vmscan: merge duplicate code in shrink_active_list() ... The "move pages to active list" and "move pages to inactive list" code blocks are mostly identical and can be served by a function. Thanks to Andrew Morton for pointing this out. Note that buffer_heads_over_limit check will also be carried out for re-activated pages, which is slightly different from pre-2.6.28 kernels. Also, Rik's "vmscan: evict use-once pages first" patch could totally stop scans of active file list when memory pressure is low. So the net effect could be, the number of buffer heads is now more likely to grow large. However that's fine according to Johannes' comments: I don't think that this could be harmful. We just preserve the buffer mappings of what we consider the working set and with low memory pressure, as you say, this set is not big. As to stripping of reactivated pages: the only pages we re-activate for now are those VM_EXEC mapped ones. Since we don't expect IO from or to these pages, removing the buffer mappings in case they grow too large should be okay, I guess. Cc: Pekka Enberg <penberg@cs.helsinki.fi> Acked-by: Peter Zijlstra <peterz@infradead.org> Reviewed-by: Rik van Riel <riel@redhat.com> Reviewed-by: Minchan Kim <minchan.kim@gmail.com> Reviewed-by: Johannes Weiner <hannes@cmpxchg.org> Signed-off-by: Wu Fengguang <fengguang.wu@intel.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>		2009-06-16 19:47:45 -07:00
..
allocpercpu.c	percpu: __percpu_depopulate_mask can take a const mask	2009-04-06 13:44:15 -07:00
backing-dev.c	block: change the request allocation/congestion logic to be sync/async based	2009-04-06 08:04:53 -07:00
bootmem.c	bootmem: fix slab fallback on numa	2009-06-11 19:15:54 +03:00
bounce.c	Merge branch 'for-2.6.31' of git://git.kernel.dk/linux-2.6-block	2009-06-11 11:10:35 -07:00
debug-pagealloc.c	generic debug pagealloc	2009-04-01 08:59:13 -07:00
dmapool.c	dmapool: enable debugging for CONFIG_SLUB_DEBUG_ON too	2008-04-28 08:58:20 -07:00
fadvise.c	readahead: move max_sane_readahead() calls into force_page_cache_readahead()	2009-06-16 19:47:28 -07:00
failslab.c	kmemtrace, mm: fix slab.h dependency problem in mm/failslab.c	2009-04-03 12:23:01 +02:00
filemap_xip.c	mm: do_xip_mapping_read: fix length calculation	2009-04-02 19:04:49 -07:00
filemap.c	page allocator: do not check NUMA node ID when the caller knows the node is valid	2009-06-16 19:47:32 -07:00
fremap.c	Do not account for the address space used by hugetlbfs using VM_ACCOUNT	2009-02-10 10:48:42 -08:00
highmem.c	mm: introduce debug_kmap_atomic	2009-04-01 08:59:14 -07:00
hugetlb.c	mm: introduce PageHuge() for testing huge/gigantic pages	2009-06-16 19:47:36 -07:00
init-mm.c	mm: consolidate init_mm definition	2009-06-16 19:47:28 -07:00
internal.h	mm: remove CONFIG_UNEVICTABLE_LRU config option	2009-06-16 19:47:42 -07:00
Kconfig	mm: remove CONFIG_UNEVICTABLE_LRU config option	2009-06-16 19:47:42 -07:00
Kconfig.debug	generic debug pagealloc: build fix	2009-04-02 19:04:48 -07:00
kmemleak-test.c	kmemleak: Simple testing module for kmemleak	2009-06-11 17:04:19 +01:00
kmemleak.c	kmemleak: Add the base support	2009-06-11 17:03:28 +01:00
maccess.c	[S390] maccess: add weak attribute to probe_kernel_write	2009-06-12 10:27:37 +02:00
madvise.c	mm: madvise(): correct return code	2009-06-16 19:47:40 -07:00
Makefile	mm: consolidate init_mm definition	2009-06-16 19:47:28 -07:00
memcontrol.c	vmscan: evict use-once pages first	2009-06-16 19:47:38 -07:00
memory_hotplug.c	page-allocator: reset wmark_min and inactive ratio of zone when hotplug happens	2009-06-16 19:47:42 -07:00
memory.c	mm: introduce follow_pfn()	2009-06-16 19:47:40 -07:00
mempolicy.c	page allocator: do not check NUMA node ID when the caller knows the node is valid	2009-06-16 19:47:32 -07:00
mempool.c
migrate.c	migration: only migrate_prep() once per move_pages()	2009-06-16 19:47:41 -07:00
mincore.c	[CVE-2009-0029] System call wrappers part 14	2009-01-14 14:15:24 +01:00
mlock.c	mm: remove CONFIG_UNEVICTABLE_LRU config option	2009-06-16 19:47:42 -07:00
mm_init.c	mm: mminit_loglevel cannot be __meminitdata anymore	2008-08-20 15:40:30 -07:00
mmap.c	Merge branch 'perfcounters-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip	2009-06-11 14:01:07 -07:00
mmu_notifier.c	mmu-notifiers: core	2008-07-28 16:30:21 -07:00
mmzone.c	[ARM] Double check memmap is actually valid with a memmap has unexpected holes V2	2009-05-18 11:22:24 +01:00
mprotect.c	perf_counter: Add mmap event hooks to mprotect()	2009-06-08 23:10:43 +02:00
mremap.c	[CVE-2009-0029] System call wrappers part 13	2009-01-14 14:15:23 +01:00
msync.c	[CVE-2009-0029] System call wrappers part 13	2009-01-14 14:15:23 +01:00
nommu.c	nommu: Provide mmap_min_addr definition.	2009-06-10 09:24:09 +10:00
oom_kill.c	oom: avoid unnecessary mm locking and scanning for OOM_DISABLE	2009-06-16 19:47:43 -07:00
page_alloc.c	page-allocator: clear N_HIGH_MEMORY map before we set it again	2009-06-16 19:47:43 -07:00
page_cgroup.c	memcg: fix page_cgroup fatal error in FLATMEM	2009-06-12 11:00:54 +03:00
page_io.c	mm: remove file argument from swap_readpage()	2009-06-16 19:47:44 -07:00
page_isolation.c	memory hotplug: fix page_zone() calculation in test_pages_isolated()	2008-11-06 15:41:19 -08:00
page-writeback.c	mm/page-writeback.c: dirty limit type should be unsigned long	2009-06-16 19:47:31 -07:00
pagewalk.c	pagemap: pass mm into pagewalkers	2008-06-12 18:05:41 -07:00
pdflush.c	Revert "mm: add /proc controls for pdflush threads"	2009-05-15 11:32:24 +02:00
percpu.c	percpu: remove rbtree and use page->index instead	2009-04-08 18:31:31 +02:00
prio_tree.c
quicklist.c	cpumask: replace node_to_cpumask with cpumask_of_node.	2009-03-13 14:49:46 +10:30
readahead.c	readahead: introduce context readahead algorithm	2009-06-16 19:47:30 -07:00
rmap.c	vmscan: report vm_flags in page_referenced()	2009-06-16 19:47:44 -07:00
shmem_acl.c	[PATCH] sanitize ->permission() prototype	2008-07-26 20:53:14 -04:00
shmem.c	mm cleanup: shmem_file_setup: 'char *' -> 'const char *' for name argument	2009-06-16 19:47:44 -07:00
slab.c	page allocator: slab: use nr_online_nodes to check for a NUMA platform	2009-06-16 19:47:35 -07:00
slob.c	page allocator: do not check NUMA node ID when the caller knows the node is valid	2009-06-16 19:47:32 -07:00
slub.c	page allocator: use a pre-calculated value instead of num_online_nodes() in fast paths	2009-06-16 19:47:35 -07:00
sparse-vmemmap.c	vmemmap: warn about page_structs with remote distance	2008-11-06 15:41:19 -08:00
sparse.c	mm: mminit_validate_memmodel_limits(): remove redundant test	2009-04-01 08:59:11 -07:00
swap_state.c	mm: remove file argument from swap_readpage()	2009-06-16 19:47:44 -07:00
swap.c	mm: fix Committed_AS underflow on large NR_CPUS environment	2009-05-02 15:36:10 -07:00
swapfile.c	mm: reuse unused swap entry if necessary	2009-06-16 19:47:42 -07:00
thrash.c
truncate.c	mm: remove __invalidate_mapping_pages variant	2009-06-16 19:47:43 -07:00
util.c	mm: clean up get_user_pages_fast() documentation	2009-06-16 19:47:30 -07:00
vmalloc.c	Merge branch 'for-linus' of git://linux-arm.org/linux-2.6	2009-06-11 14:15:57 -07:00
vmscan.c	vmscan: merge duplicate code in shrink_active_list()	2009-06-16 19:47:45 -07:00
vmstat.c	mm: remove CONFIG_UNEVICTABLE_LRU config option	2009-06-16 19:47:42 -07:00