Alex,Shi d2ebd0f6b8 kswapd: avoid unnecessary rebalance after an unsuccessful balancing ... In commit 215ddd66 ("mm: vmscan: only read new_classzone_idx from pgdat when reclaiming successfully") , Mel Gorman said kswapd is better to sleep after a unsuccessful balancing if there is tighter reclaim request pending in the balancing. But in the following scenario, kswapd do something that is not matched our expectation. The patch fixes this issue. 1, Read pgdat request A (classzone_idx, order = 3) 2, balance_pgdat() 3, During pgdat, a new pgdat request B (classzone_idx, order = 5) is placed 4, balance_pgdat() returns but failed since returned order = 0 5, pgdat of request A assigned to balance_pgdat(), and do balancing again. While the expectation behavior of kswapd should try to sleep. Signed-off-by: Alex Shi <alex.shi@intel.com> Reviewed-by: Tim Chen <tim.c.chen@linux.intel.com> Acked-by: Mel Gorman <mgorman@suse.de> Tested-by: Pádraig Brady <P@draigBrady.com> Cc: Rik van Riel <riel@redhat.com> Cc: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>		2011-10-31 17:30:48 -07:00
..
backing-dev.c	mm: Add comment explaining task state setting in bdi_forker_thread()	2011-09-02 17:17:02 -06:00
bootmem.c
bounce.c
cleancache.c	mm: cleancache core ops functions and config	2011-05-26 10:01:36 -06:00
compaction.c	mm: compaction: make isolate_lru_page() filter-aware	2011-10-31 17:30:44 -07:00
debug-pagealloc.c	debug-pagealloc: add support for highmem pages	2011-10-31 17:30:48 -07:00
dmapool.c	devres: fix possible use after free	2011-07-25 20:57:14 -07:00
fadvise.c
failslab.c	fault-injection: add ability to export fault_attr in arbitrary directory	2011-08-03 14:25:20 -10:00
filemap_xip.c	mm: Convert i_mmap_lock to a mutex	2011-05-25 08:39:18 -07:00
filemap.c	vfs: iov_iter: have iov_iter_advance decrement nr_segs appropriately	2011-10-28 13:55:08 +02:00
fremap.c	mm: don't access vm_flags as 'int'	2011-05-26 09:20:31 -07:00
highmem.c	mm: make HASHED_PAGE_VIRTUAL page_address' struct page argument const.	2011-08-17 13:00:20 -07:00
huge_memory.c	thp: mremap support and TLB optimization	2011-10-31 17:30:48 -07:00
hugetlb.c	mm: hugetlb: fix coding style issues	2011-07-25 20:57:09 -07:00
hwpoison-inject.c
init-mm.c	atomic: use <linux/atomic.h>	2011-07-26 16:49:47 -07:00
internal.h	mm: nommu: sort mm->mmap list properly	2011-05-25 08:39:05 -07:00
Kconfig	memblock: add NO_BOOTMEM config symbol	2011-10-31 17:30:47 -07:00
Kconfig.debug
kmemcheck.c
kmemleak-test.c
kmemleak.c	atomic: use <linux/atomic.h>	2011-07-26 16:49:47 -07:00
ksm.c	oom: fix race while temporarily setting current's oom_score_adj	2011-10-31 17:30:45 -07:00
maccess.c	maccess,probe_kernel: Make write/read src const void *	2011-05-25 19:56:23 -04:00
madvise.c	fs: kill i_alloc_sem	2011-07-20 20:47:46 -04:00
Makefile	Cross Memory Attach	2011-10-31 17:30:44 -07:00
memblock.c	memblock: add memblock_start_of_DRAM()	2011-10-31 17:30:47 -07:00
memcontrol.c	mm: change isolate mode from #define to bitwise type	2011-10-31 17:30:44 -07:00
memory_hotplug.c	mm: extend memory hotplug API to allow memory hotplug in virtual machines	2011-07-25 20:57:08 -07:00
memory-failure.c	HWPoison: add memory_failure_queue()	2011-08-03 11:15:58 -04:00
memory.c	mm/futex: fix futex writes on archs with SW tracking of dirty & young	2011-07-25 20:57:11 -07:00
mempolicy.c	mm/mempolicy.c: make copy_from_user() provably correct	2011-09-14 18:09:36 -07:00
mempool.c
migrate.c	mm: migration: clean up unmap_and_move()	2011-10-31 17:30:45 -07:00
mincore.c	mm: clarify the radix_tree exceptional cases	2011-08-03 14:25:24 -10:00
mlock.c	mm: don't access vm_flags as 'int'	2011-05-26 09:20:31 -07:00
mm_init.c
mmap.c	mmap: fix and tidy up overcommit page arithmetic	2011-07-25 20:57:09 -07:00
mmu_context.c
mmu_notifier.c
mmzone.c
mprotect.c
mremap.c	thp: mremap support and TLB optimization	2011-10-31 17:30:48 -07:00
msync.c
nobootmem.c	memblock/nobootmem: remove unneeded code from alloc_bootmem_node_high()	2011-05-25 08:39:31 -07:00
nommu.c	mmap: fix and tidy up overcommit page arithmetic	2011-07-25 20:57:09 -07:00
oom_kill.c	oom: fix race while temporarily setting current's oom_score_adj	2011-10-31 17:30:45 -07:00
page_alloc.c	mm: neaten warn_alloc_failed	2011-10-31 17:30:48 -07:00
page_cgroup.c	mm: Convert vmalloc/memset to vzalloc	2011-09-15 13:56:56 +02:00
page_io.c
page_isolation.c
page-writeback.c	mm/page-writeback.c: document bdi_min_ratio	2011-10-31 17:30:45 -07:00
pagewalk.c	pagewalk: fix code comment for THP	2011-07-25 20:57:09 -07:00
percpu-km.c
percpu-vm.c
percpu.c
pgtable-generic.c
prio_tree.c
process_vm_access.c	Cross Memory Attach	2011-10-31 17:30:44 -07:00
quicklist.c
readahead.c	readahead: readahead page allocations are OK to fail	2011-05-25 08:39:25 -07:00
rmap.c	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/wfg/writeback	2011-07-26 10:39:54 -07:00
shmem.c	Merge branch 'next-evm' of git://git.kernel.org/pub/scm/linux/kernel/git/zohar/ima-2.6 into next	2011-08-09 10:31:03 +10:00
slab.c	mm: restrict access to slab files under procfs and sysfs	2011-09-27 22:59:27 +03:00
slob.c	atomic: use <linux/atomic.h>	2011-07-26 16:49:47 -07:00
slub.c	lib/string.c: introduce memchr_inv()	2011-10-31 17:30:47 -07:00
sparse-vmemmap.c
sparse.c	mm: make some struct page's const	2011-07-25 20:57:07 -07:00
swap_state.c
swap.c	mm: batch activate_page() to reduce lock contention	2011-05-25 08:39:37 -07:00
swapfile.c	oom: fix race while temporarily setting current's oom_score_adj	2011-10-31 17:30:45 -07:00
thrash.c	mm: swap-token: add a comment for priority aging	2011-07-25 20:57:08 -07:00
truncate.c	mm: a few small updates for radix-swap	2011-08-03 14:25:24 -10:00
util.c	mm: nommu: sort mm->mmap list properly	2011-05-25 08:39:05 -07:00
vmalloc.c	mm: neaten warn_alloc_failed	2011-10-31 17:30:48 -07:00
vmscan.c	kswapd: avoid unnecessary rebalance after an unsuccessful balancing	2011-10-31 17:30:48 -07:00
vmstat.c	mm: vmscan: immediately reclaim end-of-LRU dirty pages when writeback completes	2011-10-31 17:30:47 -07:00