Arve Hjønnevåg 6d3163ce86 mm: check if any page in a pageblock is reserved before marking it MIGRATE_RESERVE ... This fixes a problem where the first pageblock got marked MIGRATE_RESERVE even though it only had a few free pages. eg, On current ARM port, The kernel starts at offset 0x8000 to leave room for boot parameters, and the memory is freed later. This in turn caused no contiguous memory to be reserved and frequent kswapd wakeups that emptied the caches to get more contiguous memory. Unfortunatelly, ARM needs order-2 allocation for pgd (see arm/mm/pgd.c#pgd_alloc()). Therefore the issue is not minor nor easy avoidable. [kosaki.motohiro@jp.fujitsu.com: added some explanation] [kosaki.motohiro@jp.fujitsu.com: add !pfn_valid_within() to check] [minchan.kim@gmail.com: check end_pfn in pageblock_is_reserved] Signed-off-by: John Stultz <john.stultz@linaro.org> Signed-off-by: Arve Hjønnevåg <arve@android.com> Signed-off-by: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com> Acked-by: Mel Gorman <mel@csn.ul.ie> Acked-by: Dave Hansen <dave@linux.vnet.ibm.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>		2011-05-25 08:39:24 -07:00
..
backing-dev.c	Fix common misspellings	2011-03-31 11:26:23 -03:00
bootmem.c	crash_dump: export is_kdump_kernel to modules, consolidate elfcorehdr_addr, setup_elfcorehdr and saved_max_pfn	2011-03-23 19:47:19 -07:00
bounce.c
compaction.c	mm: compaction: minimise the time IRQs are disabled while isolating pages for migration	2011-03-22 17:44:05 -07:00
debug-pagealloc.c
dmapool.c	mm/dmapool.c: use TASK_UNINTERRUPTIBLE in dma_pool_alloc()	2011-01-13 17:32:48 -08:00
fadvise.c
failslab.c
filemap.c	mm: Convert i_mmap_lock to a mutex	2011-05-25 08:39:18 -07:00
filemap_xip.c	mm: Convert i_mmap_lock to a mutex	2011-05-25 08:39:18 -07:00
fremap.c	mm: Convert i_mmap_lock to a mutex	2011-05-25 08:39:18 -07:00
highmem.c	mm,x86: fix kmap_atomic_push vs ioremap_32.c	2010-10-27 18:03:05 -07:00
huge_memory.c	mm: thp: optimize memcg charge in khugepaged	2011-05-25 08:39:21 -07:00
hugetlb.c	mm: Convert i_mmap_lock to a mutex	2011-05-25 08:39:18 -07:00
hwpoison-inject.c	Fix common misspellings	2011-03-31 11:26:23 -03:00
init-mm.c	mm: convert mm->cpu_vm_cpumask into cpumask_var_t	2011-05-25 08:39:21 -07:00
internal.h	mm: nommu: sort mm->mmap list properly	2011-05-25 08:39:05 -07:00
Kconfig	mm: compaction: don't depend on HUGETLB_PAGE	2011-01-26 10:50:02 +10:00
Kconfig.debug	mm: debug-pagealloc: fix kconfig dependency warning	2011-03-22 17:44:02 -07:00
kmemcheck.c
kmemleak-test.c	kmemleak: remove memset by using kzalloc	2011-01-27 18:31:51 +00:00
kmemleak.c	kmemleak: Do not return a pointer to an object that kmemleak did not get	2011-05-19 17:35:28 +01:00
ksm.c	oom: replace PF_OOM_ORIGIN with toggling oom_score_adj	2011-05-25 08:39:10 -07:00
maccess.c
madvise.c	thp: khugepaged: make khugepaged aware about madvise	2011-01-13 17:32:47 -08:00
Makefile	bootmem: Separate out CONFIG_NO_BOOTMEM code into nobootmem.c	2011-02-24 14:43:05 +01:00
memblock.c	mm/memblock: properly handle overlaps and fix error path	2011-03-22 17:44:09 -07:00
memcontrol.c	Fix common misspellings	2011-03-31 11:26:23 -03:00
memory-failure.c	mem-hwpoison: fix page refcount around isolate_lru_page()	2011-05-25 08:39:23 -07:00
memory.c	mm: uninline large generic tlb.h functions	2011-05-25 08:39:20 -07:00
memory_hotplug.c	mem-hotplug: call isolate_lru_page with elevated refcount	2011-05-25 08:39:22 -07:00
mempolicy.c	mempolicy: remove redundant check in __mpol_equal()	2011-03-22 17:44:04 -07:00
mempool.c
migrate.c	mm: use refcounts for page_lock_anon_vma()	2011-05-25 08:39:19 -07:00
mincore.c	thp: mincore transparent hugepage support	2011-01-13 17:32:44 -08:00
mlock.c	VM: skip the stack guard page lookup in get_user_pages only for mlock	2011-05-04 21:30:28 -07:00
mm_init.c
mmap.c	mm: convert anon_vma->lock to a mutex	2011-05-25 08:39:19 -07:00
mmu_context.c
mmu_notifier.c	thp: mmu_notifier_test_young	2011-01-13 17:32:46 -08:00
mmzone.c	mm: page allocator: adjust the per-cpu counter threshold when memory is low	2011-01-13 17:32:31 -08:00
mprotect.c	thp: mprotect: transparent huge page support	2011-01-13 17:32:44 -08:00
mremap.c	mm: Convert i_mmap_lock to a mutex	2011-05-25 08:39:18 -07:00
msync.c
nobootmem.c	Fix common misspellings	2011-03-31 11:26:23 -03:00
nommu.c	mm: nommu: fix a compile warning in do_mmap_pgoff()	2011-05-25 08:39:07 -07:00
oom_kill.c	oom: replace PF_OOM_ORIGIN with toggling oom_score_adj	2011-05-25 08:39:10 -07:00
page-writeback.c	Merge branch 'for-2.6.39/core' of git://git.kernel.dk/linux-2.6-block	2011-03-24 10:16:26 -07:00
page_alloc.c	mm: check if any page in a pageblock is reserved before marking it MIGRATE_RESERVE	2011-05-25 08:39:24 -07:00
page_cgroup.c	memcg: allocate memory cgroup structures in local nodes	2011-05-11 18:50:45 -07:00
page_io.c	block: kill off REQ_UNPLUG	2011-03-10 08:52:27 +01:00
page_isolation.c
pagewalk.c	pagewalk: only split huge pages when necessary	2011-03-22 17:44:04 -07:00
percpu-km.c
percpu-vm.c	mm: remove gfp mask from pcpu_get_vm_areas	2011-01-13 17:32:34 -08:00
percpu.c	Merge branch 'for-2.6.40' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/percpu	2011-05-24 11:53:42 -07:00
pgtable-generic.c	mm/pgtable-generic.c: fix CONFIG_SWAP=n build	2011-01-26 10:49:58 +10:00
prio_tree.c	sanitize <linux/prefetch.h> usage	2011-05-20 12:50:29 -07:00
quicklist.c
readahead.c	read-ahead: use plugging	2011-03-10 08:52:26 +01:00
rmap.c	mm: optimize page_lock_anon_vma() fast-path	2011-05-25 08:39:20 -07:00
shmem.c	tmpfs: fix highmem swapoff crash regression	2011-05-20 16:23:19 -07:00
slab.c	sanitize <linux/prefetch.h> usage	2011-05-20 12:50:29 -07:00
slob.c	mm: Remove support for kmem_cache_name()	2011-01-23 21:00:05 +02:00
slub.c	slub: Fix double bit unlock in debug mode	2011-05-25 08:38:24 -07:00
sparse-vmemmap.c	tree-wide: fix comment/printk typos	2010-11-01 15:38:34 -04:00
sparse.c	Fix common misspellings	2011-03-31 11:26:23 -03:00
swap.c	mm: check PageUnevictable in lru_deactivate_fn()	2011-05-11 18:50:44 -07:00
swap_state.c	block: remove per-queue plugging	2011-03-10 08:52:07 +01:00
swapfile.c	oom: replace PF_OOM_ORIGIN with toggling oom_score_adj	2011-05-25 08:39:10 -07:00
thrash.c
truncate.c	mm: deactivate invalidated pages	2011-03-22 17:44:03 -07:00
util.c	mm: nommu: sort mm->mmap list properly	2011-05-25 08:39:05 -07:00
vmalloc.c	mm: print vmalloc() state after allocation failures	2011-05-25 08:39:22 -07:00
vmscan.c	mm: strictly require elevated page refcount in isolate_lru_page()	2011-05-25 08:39:23 -07:00
vmstat.c	mm, mem-hotplug: update pcp->stat_threshold when memory hotplug occur	2011-05-25 08:39:09 -07:00