Mel Gorman dd5d241ea9 page-allocator: always change pageblock ownership when anti-fragmentation is disabled ... On low-memory systems, anti-fragmentation gets disabled as fragmentation cannot be avoided on a sufficiently large boundary to be worthwhile. Once disabled, there is a period of time when all the pageblocks are marked MOVABLE and the expectation is that they get marked UNMOVABLE at each call to __rmqueue_fallback(). However, when MAX_ORDER is large the pageblocks do not change ownership because the normal criteria are not met. This has the effect of prematurely breaking up too many large contiguous blocks. This is most serious on NOMMU systems which depend on high-order allocations to boot. This patch causes pageblocks to change ownership on every fallback when anti-fragmentation is disabled. This prevents the large blocks being prematurely broken up. This is a fix to commit 49255c619f [page allocator: move check for disabled anti-fragmentation out of fastpath] and the problem affects 2.6.31-rc8. Signed-off-by: Mel Gorman <mel@csn.ul.ie> Tested-by: Paul Mundt <lethal@linux-sh.org> Cc: David Howells <dhowells@redhat.com> Cc: Pekka Enberg <penberg@cs.helsinki.fi> Acked-by: Greg Ungerer <gerg@snapgear.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>		2009-09-05 11:30:42 -07:00
..
allocpercpu.c	percpu: __percpu_depopulate_mask can take a const mask	2009-04-06 13:44:15 -07:00
backing-dev.c	Fix congestion_wait() sync/async vs read/write confusion	2009-07-10 20:31:53 +02:00
bootmem.c	kmemleak: Add callbacks to the bootmem allocator	2009-07-08 14:25:14 +01:00
bounce.c	block: remove some includings of blktrace_api.h	2009-06-16 11:19:36 +02:00
debug-pagealloc.c	generic debug pagealloc	2009-04-01 08:59:13 -07:00
dmapool.c	dmapools: protect page_list walk in show_pools()	2009-06-30 18:56:00 -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.c	mm: mark page accessed before we write_end()	2009-07-06 13:57:03 -07:00
filemap_xip.c	mm: do_xip_mapping_read: fix length calculation	2009-04-02 19:04:49 -07:00
fremap.c
highmem.c	block: remove some includings of blktrace_api.h	2009-06-16 11:19:36 +02:00
hugetlb.c	hugetlbfs: fix i_blocks accounting	2009-07-29 19:10:35 -07:00
init-mm.c	mm: consolidate init_mm definition	2009-06-16 19:47:28 -07:00
internal.h	vmscan: do not unconditionally treat zones that fail zone_reclaim() as full	2009-06-16 19:47:45 -07:00
Kconfig	Security/SELinux: seperate lsm specific mmap_min_addr	2009-08-17 15:09:11 +10:00
Kconfig.debug	kmemcheck: enable in the x86 Kconfig	2009-06-15 15:49:15 +02:00
kmemcheck.c	kmemcheck: add hooks for the page allocator	2009-06-15 15:48:33 +02:00
kmemleak-test.c	kmemleak: Simple testing module for kmemleak	2009-06-11 17:04:19 +01:00
kmemleak.c	kmemleak: Protect the seq start/next/stop sequence by rcu_read_lock()	2009-07-29 12:34:58 -07:00
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	Merge branch 'akpm'	2009-06-16 19:50:13 -07:00
memcontrol.c	cgroup avoid permanent sleep at rmdir	2009-07-29 19:10:35 -07:00
memory.c	mm: Pass virtual address to [__]p{te,ud,md}_free_tlb()	2009-07-27 12:10:38 -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
mempolicy.c	mm: make set_mempolicy(MPOL_INTERLEAV) N_HIGH_MEMORY aware	2009-08-07 10:39:55 -07:00
mempool.c	mempool.c: clean up type-casting	2009-08-10 08:31:16 -07:00
migrate.c	migration: only migrate_prep() once per move_pages()	2009-06-16 19:47:41 -07:00
mincore.c
mlock.c	mm: remove CONFIG_UNEVICTABLE_LRU config option	2009-06-16 19:47:42 -07:00
mm_init.c
mmap.c	Security/SELinux: seperate lsm specific mmap_min_addr	2009-08-17 15:09:11 +10:00
mmu_notifier.c
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
msync.c
nommu.c	nommu: fix error handling in do_mmap_pgoff()	2009-09-05 11:30:42 -07:00
oom_kill.c	mm: revert "oom: move oom_adj value"	2009-08-18 16:31:13 -07:00
page-writeback.c	Fix congestion_wait() sync/async vs read/write confusion	2009-07-10 20:31:53 +02:00
page_alloc.c	page-allocator: always change pageblock ownership when anti-fragmentation is disabled	2009-09-05 11:30:42 -07:00
page_cgroup.c	memcg: remove some redundant checks	2009-06-18 13:03:47 -07:00
page_io.c	mm: remove file argument from swap_readpage()	2009-06-16 19:47:44 -07:00
page_isolation.c
pagewalk.c
pdflush.c	Revert "mm: add /proc controls for pdflush threads"	2009-05-15 11:32:24 +02:00
percpu.c	percpu: use the right flag for get_vm_area()	2009-08-14 13:21:10 +09:00
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	mm: fix for infinite churning of mlocked pages	2009-08-26 20:06:52 -07:00
shmem.c	Get "no acls for this inode" right, fix shmem breakage	2009-06-24 16:58:48 -04:00
shmem_acl.c	switch shmem to inode->i_acl	2009-06-24 08:17:06 -04:00
slab.c	SLAB: Fix lockdep annotations	2009-06-29 09:57:10 +03:00
slob.c	fix RCU-callback-after-kmem_cache_destroy problem in sl[aou]b	2009-06-26 12:10:47 +03:00
slub.c	kmemleak: Trace the kmalloc_large* functions in slub	2009-07-08 14:25:14 +01:00
sparse-vmemmap.c
sparse.c	mm: mminit_validate_memmodel_limits(): remove redundant test	2009-04-01 08:59:11 -07:00
swap.c	mm: fix Committed_AS underflow on large NR_CPUS environment	2009-05-02 15:36:10 -07:00
swap_state.c	mm: remove file argument from swap_readpage()	2009-06-16 19:47:44 -07:00
swapfile.c	PM / Hibernate: Replace bdget call with simple atomic_inc of i_count	2009-07-29 21:07:55 +02:00
thrash.c	mm: pass mm to grab_swap_token	2009-06-23 12:50:05 -07:00
truncate.c	mm: remove __invalidate_mapping_pages variant	2009-06-16 19:47:43 -07:00
util.c	Merge branches 'slab/documentation', 'slab/fixes', 'slob/cleanups' and 'slub/fixes' into for-linus	2009-06-17 08:30:15 +03:00
vmalloc.c	Merge branch 'for-linus' of git://linux-arm.org/linux-2.6	2009-06-11 14:15:57 -07:00
vmscan.c	mm: fix for infinite churning of mlocked pages	2009-08-26 20:06:52 -07:00
vmstat.c	vmscan: count the number of times zone_reclaim() scans and fails	2009-06-16 19:47:46 -07:00