Repository files (latest commit first)

Filename	Latest commit message	Latest commit date
Mel Gorman 8fb74b9fb2 mm: compaction: partially revert capture of suitable high-order page ... Eric Wong reported on 3.7 and 3.8-rc2 that ppoll() got stuck when waiting for POLLIN on a local TCP socket. It was easier to trigger if there was disk IO and dirty pages at the same time and he bisected it to commit 1fb3f8ca0e ("mm: compaction: capture a suitable high-order page immediately when it is made available"). The intention of that patch was to improve high-order allocations under memory pressure after changes made to reclaim in 3.6 drastically hurt THP allocations but the approach was flawed. For Eric, the problem was that page->pfmemalloc was not being cleared for captured pages leading to a poor interaction with swap-over-NFS support causing the packets to be dropped. However, I identified a few more problems with the patch including the fact that it can increase contention on zone->lock in some cases which could result in async direct compaction being aborted early. In retrospect the capture patch took the wrong approach. What it should have done is mark the pageblock being migrated as MIGRATE_ISOLATE if it was allocating for THP and avoided races that way. While the patch was showing to improve allocation success rates at the time, the benefit is marginal given the relative complexity and it should be revisited from scratch in the context of the other reclaim-related changes that have taken place since the patch was first written and tested. This patch partially reverts commit 1fb3f8ca0e ("mm: compaction: capture a suitable high-order page immediately when it is made available"). Reported-and-tested-by: Eric Wong <normalperson@yhbt.net> Tested-by: Eric Dumazet <eric.dumazet@gmail.com> Cc: <stable@vger.kernel.org> Signed-off-by: Mel Gorman <mgorman@suse.de> Cc: David Miller <davem@davemloft.net> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>		2013-01-11 14:54:56 -08:00
..
backing-dev.c	Revert "bdi: add a user-tunable cpu_list for the bdi flusher threads"	2012-12-17 11:29:09 -08:00
balloon_compaction.c	mm: introduce a common interface for balloon pages mobility	2012-12-11 17:22:26 -08:00
bootmem.c	mm: bootmem: fix free_all_bootmem_core() with odd bitmap alignment	2013-01-11 14:54:55 -08:00
bounce.c
cleancache.c
compaction.c	mm: compaction: partially revert capture of suitable high-order page	2013-01-11 14:54:56 -08:00
debug-pagealloc.c
dmapool.c	dmapool: make DMAPOOL_DEBUG detect corruption of free marker	2012-12-11 17:22:24 -08:00
fadvise.c	switch simple cases of fget_light to fdget	2012-09-26 22:20:08 -04:00
failslab.c
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	Some nice cleanups, and even a patch my wife did as a "live" demo for	2012-12-20 08:37:05 -08:00
huge_memory.c	mm: thp: acquire the anon_vma rwsem for write during split	2013-01-11 14:54:55 -08:00
hugetlb.c	mm/hugetlb: create hugetlb cgroup file in hugetlb_init	2012-12-18 15:02:15 -08:00
hugetlb_cgroup.c	mm/hugetlb: create hugetlb cgroup file in hugetlb_init	2012-12-18 15:02:15 -08:00
hwpoison-inject.c
init-mm.c
internal.h	mm: compaction: partially revert capture of suitable high-order page	2013-01-11 14:54:56 -08:00
interval_tree.c	mm: add CONFIG_DEBUG_VM_RB build option	2012-10-09 16:22:42 +09:00
Kconfig	memory-hotplug: document and enable CONFIG_MOVABLE_NODE	2012-12-18 15:02:12 -08:00
Kconfig.debug
kmemcheck.c
kmemleak-test.c
kmemleak.c	mm/kmemleak.c: remove obsolete simple_strtoul	2012-12-18 15:02:15 -08:00
ksm.c	ksm: make rmap walks more scalable	2012-12-20 07:06:56 -08:00
maccess.c
madvise.c	mm: prepare VM_DONTDUMP for using in drivers	2012-10-09 16:22:18 +09:00
Makefile	mm: introduce a common interface for balloon pages mobility	2012-12-11 17:22:26 -08:00
memblock.c	mm: memblock: fix wrong memmove size in memblock_merge_regions()	2013-01-11 14:54:54 -08:00
memcontrol.c	memcg: don't register hotcpu notifier from ->css_alloc()	2012-12-20 17:40:20 -08:00
memory-failure.c	Automatic NUMA Balancing V11	2012-12-16 15:18:08 -08:00
memory.c	mm: reinstante dropped pmd_trans_splitting() check	2013-01-09 08:36:54 -08:00
memory_hotplug.c	mm/memory_hotplug.c: improve comments	2012-12-18 15:02:15 -08:00
mempolicy.c	mm: mempolicy: Convert shared_policy mutex to spinlock	2013-01-02 17:32:13 -08:00
mempool.c
migrate.c	mm: migrate: check page_count of THP before migrating	2013-01-11 14:54:54 -08:00
mincore.c
mlock.c	mm, thp: fix mlock statistics	2012-10-09 16:23:03 +09:00
mm_init.c
mmap.c	mm: mmap: annotate vm_lock_anon_vma locking properly for lockdep	2013-01-11 14:54:55 -08:00
mmu_context.c
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	mm/mprotect.c: coding-style cleanups	2012-12-18 15:02:15 -08:00
mremap.c	Automatic NUMA Balancing V11	2012-12-16 15:18:08 -08:00
msync.c
nobootmem.c	mm: introduce new field "managed_pages" to struct zone	2012-12-12 17:38:34 -08:00
nommu.c	mm: export a function to get vm committed memory	2012-11-15 15:41:22 -08:00
oom_kill.c	mm, oom: remove redundant sleep in pagefault oom handler	2012-12-12 17:38:34 -08:00
page-writeback.c	mm: fix calculation of dirtyable memory	2012-12-20 17:40:18 -08:00
page_alloc.c	mm: compaction: partially revert capture of suitable high-order page	2013-01-11 14:54:56 -08:00
page_cgroup.c	memcontrol: use N_MEMORY instead N_HIGH_MEMORY	2012-12-12 17:38:32 -08:00
page_io.c	mm: add support for direct_IO to highmem pages	2012-07-31 18:42:47 -07:00
page_isolation.c	mm: fix zone_watermark_ok_safe() accounting of isolated pages	2013-01-04 16:11:46 -08:00
pagewalk.c	thp: change split_huge_page_pmd() interface	2012-12-12 17:38:31 -08:00
percpu-km.c
percpu-vm.c
percpu.c	mm, percpu: Make sure percpu_alloc early parameter has an argument	2012-12-02 06:23:04 -08:00
pgtable-generic.c	mm: Only flush the TLB when clearing an accessible pte	2012-12-11 14:28:34 +00:00
process_vm_access.c
quicklist.c
readahead.c	switch simple cases of fget_light to fdget	2012-09-26 22:20:08 -04:00
rmap.c	Automatic NUMA Balancing V11	2012-12-16 15:18:08 -08:00
shmem.c	mempolicy: remove arg from mpol_parse_str, mpol_to_str	2013-01-02 09:27:10 -08:00
slab.c	memcg: add comments clarifying aspects of cache attribute propagation	2012-12-18 15:02:15 -08:00
slab.h	slab: propagate tunable values	2012-12-18 15:02:14 -08:00
slab_common.c	slab: propagate tunable values	2012-12-18 15:02:14 -08:00
slob.c	sl[au]b: always get the cache from its page in kmem_cache_free()	2012-12-18 15:02:14 -08:00
slub.c	slub: drop mutex before deleting sysfs entry	2012-12-18 15:02:15 -08:00
sparse-vmemmap.c
sparse.c	memory-hotplug, mm/sparse.c: clear the memory to store struct page	2012-12-11 17:22:23 -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	mm, oom: fix race when specifying a thread as the oom origin	2012-12-11 17:22:27 -08:00
truncate.c	mm: drop vmtruncate	2012-12-20 18:46:29 -05:00
util.c	Merge branch 'master' into for-next	2012-10-28 19:29:19 +01:00
vmalloc.c	mm: use IS_ENABLED(CONFIG_NUMA) instead of NUMA_BUILD	2012-12-11 17:22:22 -08:00
vmscan.c	MM: vmscan: remove __devinit attribute.	2013-01-03 15:57:13 -08:00
vmstat.c	Automatic NUMA Balancing V11	2012-12-16 15:18:08 -08:00