Johannes Weiner 60cefed485 mm: vmscan: fix endless loop in kswapd balancing ... Kswapd does not in all places have the same criteria for a balanced zone. Zones are only being reclaimed when their high watermark is breached, but compaction checks loop over the zonelist again when the zone does not meet the low watermark plus two times the size of the allocation. This gets kswapd stuck in an endless loop over a small zone, like the DMA zone, where the high watermark is smaller than the compaction requirement. Add a function, zone_balanced(), that checks the watermark, and, for higher order allocations, if compaction has enough free memory. Then use it uniformly to check for balanced zones. This makes sure that when the compaction watermark is not met, at least reclaim happens and progress is made - or the zone is declared unreclaimable at some point and skipped entirely. Signed-off-by: Johannes Weiner <hannes@cmpxchg.org> Reported-by: George Spelvin <linux@horizon.com> Reported-by: Johannes Hirte <johannes.hirte@fem.tu-ilmenau.de> Reported-by: Tomas Racek <tracek@redhat.com> Tested-by: Johannes Hirte <johannes.hirte@fem.tu-ilmenau.de> Reviewed-by: Rik van Riel <riel@redhat.com> Cc: Mel Gorman <mel@csn.ul.ie> Cc: <stable@vger.kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>		2012-11-30 08:51:17 -08:00
..
backing-dev.c	backing-dev: use kstrto* in preference to simple_strtoul	2012-08-25 16:58:14 +08:00
bootmem.c	revert "mm: fix-up zone present pages"	2012-11-16 14:33:04 -08:00
bounce.c	bounce: allow use of bounce pool via config option	2012-07-18 16:40:35 -04:00
cleancache.c	->encode_fh() API change	2012-05-29 23:28:33 -04:00
compaction.c	mm: compaction: correct the nr_strict va isolated check for CMA	2012-10-19 14:07:47 -07:00
debug-pagealloc.c	mm, x86: Remove debug_pagealloc_enabled	2011-12-06 09:24:07 +01:00
dmapool.c	mm: fix implicit stat.h usage in dmapool.c	2011-10-31 09:20:12 -04:00
fadvise.c	switch simple cases of fget_light to fdget	2012-09-26 22:20:08 -04:00
failslab.c	switch debugfs to umode_t	2012-01-03 22:54:56 -05:00
filemap.c	readahead: fault retry breaks mmap file read random detection	2012-10-09 16:22:47 +09:00
filemap_xip.c	mm: move all mmu notifier invocations to be done outside the PT lock	2012-10-09 16:22:58 +09:00
fremap.c	remap_file_pages: correctly handle the case of a NULL vm_ops pointer	2012-10-19 13:37:57 -07:00
frontswap.c	frontswap: support exclusive gets if tmem backend is capable	2012-09-21 10:38:12 -04:00
highmem.c	mm: highmem: don't treat PKMAP_ADDR(LAST_PKMAP) as a highmem address	2012-11-16 14:33:04 -08:00
huge_memory.c	mm: huge_memory: Fix build error.	2012-10-15 07:59:15 -07:00
hugetlb.c	mm: document PageHuge somewhat	2012-10-09 16:23:03 +09:00
hugetlb_cgroup.c	hugetlb/cgroup: remove exclude and wakeup rmdir calls from migrate	2012-07-31 18:42:41 -07:00
hwpoison-inject.c	memcg: rename config variables	2012-07-31 18:42:43 -07:00
init-mm.c	atomic: use <linux/atomic.h>	2011-07-26 16:49:47 -07:00
internal.h	mm, thp: fix mlock statistics	2012-10-09 16:23:03 +09:00
interval_tree.c	mm: add CONFIG_DEBUG_VM_RB build option	2012-10-09 16:22:42 +09:00
Kconfig	mm: enable CONFIG_COMPACTION by default	2012-10-09 16:22:53 +09:00
Kconfig.debug	mm: more intensive memory corruption debugging	2012-01-10 16:30:42 -08:00
kmemcheck.c
kmemleak-test.c	kmemleak: remove memset by using kzalloc	2011-01-27 18:31:51 +00:00
kmemleak.c	kmemleak: use rbtree instead of prio tree	2012-10-09 16:22:39 +09:00
ksm.c	mm: wrap calls to set_pte_at_notify with invalidate_range_start and invalidate_range_end	2012-10-09 16:22:58 +09:00
maccess.c	mm: Map most files to use export.h instead of module.h	2011-10-31 09:20:12 -04:00
madvise.c	mm: prepare VM_DONTDUMP for using in drivers	2012-10-09 16:22:18 +09:00
Makefile	mm: replace vma prio_tree with an interval tree	2012-10-09 16:22:39 +09:00
memblock.c	x86, mm: Trim memory in memblock to be page aligned	2012-10-24 11:52:21 -07:00
memcontrol.c	memcg: fix hotplugged memory zone oops	2012-11-16 14:33:04 -08:00
memory-failure.c	mm anon rmap: replace same_anon_vma linked list with an interval tree.	2012-10-09 16:22:41 +09:00
memory.c	mm: fix build warning for uninitialized value	2012-11-16 14:33:03 -08:00
memory_hotplug.c	revert "mm: fix-up zone present pages"	2012-11-16 14:33:04 -08:00
mempolicy.c	mm, mempolicy: fix printing stack contents in numa_maps	2012-10-16 18:00:50 -07:00
mempool.c	mempool: add @gfp_mask to mempool_create_node()	2012-06-25 11:53:47 +02:00
migrate.c	mm: memcg: fix compaction/migration failing due to memcg limits	2012-07-31 18:42:48 -07:00
mincore.c	mm: thp: fix pmd_bad() triggering in code paths holding mmap_sem read mode	2012-03-21 17:54:54 -07:00
mlock.c	mm, thp: fix mlock statistics	2012-10-09 16:23:03 +09:00
mm_init.c	mm: Map most files to use export.h instead of module.h	2011-10-31 09:20:12 -04:00
mmap.c	mm: add anon_vma_lock to validate_mm()	2012-11-16 14:33:03 -08:00
mmu_context.c	mm, counters: remove task argument to sync_mm_rss() and __sync_task_rss_stat()	2012-03-21 17:54:59 -07:00
mmu_notifier.c	mm/mmu_notifier: allocate mmu_notifier in advance	2012-10-25 14:37:53 -07:00
mmzone.c	memcg: fix hotplugged memory zone oops	2012-11-16 14:33:04 -08:00
mprotect.c	Merge branch 'akpm' (Andrew's patch-bomb)	2012-03-22 09:04:48 -07:00
mremap.c	mm: move all mmu notifier invocations to be done outside the PT lock	2012-10-09 16:22:58 +09:00
msync.c
nobootmem.c	revert "mm: fix-up zone present pages"	2012-11-16 14:33:04 -08:00
nommu.c	mm: replace vma prio_tree with an interval tree	2012-10-09 16:22:39 +09:00
oom_kill.c	oom: remove deprecated oom_adj	2012-10-09 16:22:24 +09:00
page-writeback.c	CPU hotplug, writeback: Don't call writeback_set_ratelimit() too often during hotplug	2012-09-28 20:27:49 +08:00
page_alloc.c	mm: compaction: fix return value of capture_free_page()	2012-11-30 08:51:17 -08:00
page_cgroup.c	memcg: rename config variables	2012-07-31 18:42:43 -07:00
page_io.c	mm: add support for direct_IO to highmem pages	2012-07-31 18:42:47 -07:00
page_isolation.c	mm/page_alloc: refactor out __alloc_contig_migrate_alloc()	2012-10-09 16:22:52 +09:00
pagewalk.c	mm: fix kernel-doc warnings	2012-06-20 14:39:36 -07:00
percpu-km.c	percpu: clear memory allocated with the km allocator	2010-10-02 10:28:42 +03:00
percpu-vm.c	mm: fix kernel-doc warnings	2012-06-20 14:39:36 -07:00
percpu.c	sections: fix section conflicts in mm/percpu.c	2012-10-06 03:04:44 +09:00
pgtable-generic.c	thp: introduce pmdp_invalidate()	2012-10-09 16:22:29 +09:00
process_vm_access.c	aio/vfs: cleanup of rw_copy_check_uvector() and compat_rw_copy_check_uvector()	2012-05-31 17:49:32 -07:00
quicklist.c	mm: delete various needless include <linux/module.h>	2011-10-31 09:20:11 -04:00
readahead.c	switch simple cases of fget_light to fdget	2012-09-26 22:20:08 -04:00
rmap.c	mm: fix XFS oops due to dirty pages without buffers on s390	2012-10-25 14:37:52 -07:00
shmem.c	tmpfs: change final i_blocks BUG to WARNING	2012-11-16 14:33:04 -08:00
slab.c	Merge branch 'slab/for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/penberg/linux	2012-10-07 07:53:13 +09:00
slab.h	Revert "mm/sl[aou]b: Move sysfs_slab_add to common"	2012-09-05 12:07:44 +03:00
slab_common.c	mm, slab: release slab_mutex earlier in kmem_cache_destroy()	2012-10-10 09:25:08 +03:00
slob.c	Merge branch 'testing/driver-warnings' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc into fixes	2012-10-19 15:40:18 -07:00
slub.c	Merge branch 'slab/common-for-cgroups' into slab/for-linus	2012-10-03 09:56:37 +03:00
sparse-vmemmap.c	mm: delete various needless include <linux/module.h>	2011-10-31 09:20:11 -04:00
sparse.c	mm/vmemmap: fix wrong use of virt_to_page	2012-11-30 08:51:17 -08:00
swap.c	mm: remove vma arg from page_evictable	2012-10-09 16:22:55 +09:00
swap_state.c	mm: add support for a filesystem to activate swap files and use direct_IO for writing swap pages	2012-07-31 18:42:47 -07:00
swapfile.c	swapfile: fix name leak in swapoff	2012-11-16 14:33:04 -08:00
truncate.c	mm: use clear_page_mlock() in page_remove_rmap()	2012-10-09 16:22:56 +09:00
util.c	mm: Use __do_krealloc to do the krealloc job	2012-09-04 10:22:58 +03:00
vmalloc.c	mm: use %pK for /proc/vmallocinfo	2012-10-09 16:23:03 +09:00
vmscan.c	mm: vmscan: fix endless loop in kswapd balancing	2012-11-30 08:51:17 -08:00
vmstat.c	mm: remove unevictable_pgs_mlockfreed	2012-10-09 16:22:59 +09:00