Mel Gorman 4f9b16a647 mm: disable zone_reclaim_mode by default ... When it was introduced, zone_reclaim_mode made sense as NUMA distances punished and workloads were generally partitioned to fit into a NUMA node. NUMA machines are now common but few of the workloads are NUMA-aware and it's routine to see major performance degradation due to zone_reclaim_mode being enabled but relatively few can identify the problem. Those that require zone_reclaim_mode are likely to be able to detect when it needs to be enabled and tune appropriately so lets have a sensible default for the bulk of users. This patch (of 2): zone_reclaim_mode causes processes to prefer reclaiming memory from local node instead of spilling over to other nodes. This made sense initially when NUMA machines were almost exclusively HPC and the workload was partitioned into nodes. The NUMA penalties were sufficiently high to justify reclaiming the memory. On current machines and workloads it is often the case that zone_reclaim_mode destroys performance but not all users know how to detect this. Favour the common case and disable it by default. Users that are sophisticated enough to know they need zone_reclaim_mode will detect it. Signed-off-by: Mel Gorman <mgorman@suse.de> Acked-by: Johannes Weiner <hannes@cmpxchg.org> Reviewed-by: Zhang Yanfei <zhangyanfei@cn.fujitsu.com> Acked-by: Michal Hocko <mhocko@suse.cz> Reviewed-by: Christoph Lameter <cl@linux.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>		2014-06-04 16:53:59 -07:00
..
backing-dev.c	arch: Mass conversion of smp_mb__*()	2014-04-18 14:20:48 +02:00
balloon_compaction.c	mm: print more details for bad_page()	2014-01-23 16:36:50 -08:00
bootmem.c	mm/bootmem.c: remove unused local `map'	2013-11-13 12:09:09 +09:00
cleancache.c	mm: dump page when hitting a VM_BUG_ON using VM_BUG_ON_PAGE	2014-01-23 16:36:50 -08:00
compaction.c	mm/compaction: make isolate_freepages start at pageblock boundary	2014-05-06 13:04:59 -07:00
debug-pagealloc.c
dmapool.c	mm: Fix printk typo in dmapool.c	2014-05-05 15:44:47 +02:00
early_ioremap.c	mm: create generic early_ioremap() support	2014-04-07 16:36:15 -07:00
fadvise.c	teach SYSCALL_DEFINE<n> how to deal with long long/unsigned long long	2013-03-03 22:46:22 -05:00
failslab.c
filemap.c	Merge branch 'locking-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip into next	2014-06-03 12:57:53 -07:00
filemap_xip.c	seqcount: Add lockdep functionality to seqcount/seqlock structures	2013-11-06 12:40:26 +01:00
fremap.c	mm: softdirty: make freshly remapped file pages being softdirty unconditionally	2014-06-04 16:53:56 -07:00
frontswap.c	frontswap: fix incorrect zeroing and allocation size for frontswap_map	2013-06-12 16:29:46 -07:00
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/huge_memory.c: complete conversion to pr_foo()	2014-06-04 16:53:58 -07:00
hugetlb.c	hugetlb: add support for gigantic page allocation at runtime	2014-06-04 16:53:59 -07:00
hugetlb_cgroup.c	cgroup: drop const from @buffer of cftype->write_string()	2014-03-19 10:23:54 -04:00
hwpoison-inject.c	mm/hwpoison: add '#' to hwpoison_inject	2014-01-21 16:19:48 -08:00
init-mm.c
internal.h	mm/readahead.c: inline ra_submit	2014-04-07 16:35:58 -07:00
interval_tree.c
iov_iter.c	take iov_iter stuff to mm/iov_iter.c	2014-04-01 23:19:30 -04:00
Kconfig	hugetlb: restrict hugepage_migration_support() to x86_64	2014-06-04 16:53:51 -07:00
Kconfig.debug
kmemcheck.c
kmemleak-test.c
kmemleak.c	mm: postpone the disabling of kmemleak early logging	2014-05-11 17:55:48 +09:00
ksm.c	mm: close PageTail race	2014-03-04 07:55:47 -08:00
list_lru.c	mm: keep page cache radix tree nodes in check	2014-04-03 16:21:01 -07:00
maccess.c
madvise.c	mm: madvise: fix MADV_WILLNEED on shmem swapouts	2014-05-23 09:37:29 -07:00
Makefile	block: move mm/bounce.c to block/	2014-05-19 20:01:52 -06:00
memblock.c	memblock: introduce memblock_alloc_range()	2014-06-04 16:53:57 -07:00
memcontrol.c	mm: memcontrol: remove hierarchy restrictions for swappiness and oom_control	2014-06-04 16:53:58 -07:00
memory-failure.c	mm/memory-failure.c: fix memory leak by race between poison and unpoison	2014-05-23 09:37:30 -07:00
memory.c	x86: define _PAGE_NUMA by reusing software bits on the PMD and PTE levels	2014-06-04 16:53:55 -07:00
memory_hotplug.c	mm/memory_hotplug.c: move register_memory_resource out of the lock_memory_hotplug	2014-01-23 16:36:52 -08:00
mempolicy.c	mm, mempolicy: remove per-process flag	2014-04-07 16:35:54 -07:00
mempool.c	mm/mempool: warn about __GFP_ZERO usage	2014-06-04 16:53:58 -07:00
migrate.c	mm: fix swapops.h:131 bug if remap_file_pages raced migration	2014-03-20 22:09:09 -07:00
mincore.c	mm + fs: prepare for non-page entries in page cache radix trees	2014-04-03 16:21:00 -07:00
mlock.c	mm: try_to_unmap_cluster() should lock_page() before mlocking	2014-04-07 16:35:57 -07:00
mm_init.c	mm: bring back /sys/kernel/mm	2014-01-27 21:02:39 -08:00
mmap.c	mm/mmap.c: replace IS_ERR and PTR_ERR with PTR_ERR_OR_ZERO	2014-06-04 16:53:58 -07:00
mmu_context.c	sched/mm: call finish_arch_post_lock_switch in idle_task_exit and use_mm	2014-02-21 08:50:17 +01:00
mmu_notifier.c	mm: audit/fix non-modular users of module_init in core code	2014-01-23 16:36:52 -08:00
mmzone.c	mm: numa: Change page last {nid,pid} into {cpu,pid}	2013-10-09 14:47:45 +02:00
mprotect.c	mm: move mmu notifier call from change_protection to change_pmd_range	2014-04-07 16:35:50 -07:00
mremap.c	mm, thp: close race between mremap() and split_huge_page()	2014-05-11 17:55:48 +09:00
msync.c
nobootmem.c	mm/nobootmem.c: mark function as static	2014-04-03 16:21:02 -07:00
nommu.c	mm: fix 'ERROR: do not initialise globals to 0 or NULL' and coding style	2014-04-07 16:35:55 -07:00
oom_kill.c	mm, oom: base root bonus on current usage	2014-01-30 16:56:56 -08:00
page-writeback.c	mm/page-writeback.c: fix divide by zero in pos_ratio_polynom	2014-05-06 13:04:58 -07:00
page_alloc.c	mm: disable zone_reclaim_mode by default	2014-06-04 16:53:59 -07:00
page_cgroup.c	mm/page_cgroup.c: mark functions as static	2014-04-03 16:21:02 -07:00
page_io.c	Merge branch 'for-3.14/core' of git://git.kernel.dk/linux-block	2014-01-30 11:19:05 -08:00
page_isolation.c	mm: memory-hotplug: enable memory hotplug to handle hugepage	2013-09-11 15:57:48 -07:00
pagewalk.c	mm/pagewalk.c: fix walk_page_range() access of wrong PTEs	2013-10-30 14:27:03 -07:00
percpu-km.c
percpu-vm.c
percpu.c	percpu: make pcpu_alloc_chunk() use pcpu_mem_free() instead of kfree()	2014-04-14 16:18:06 -04:00
pgtable-generic.c	mm: fix TLB flush race between migration, and change_protection_range	2013-12-18 19:04:51 -08:00
process_vm_access.c	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs	2014-04-12 14:49:50 -07:00
quicklist.c
readahead.c	mm/readahead.c: inline ra_submit	2014-04-07 16:35:58 -07:00
rmap.c	mm: softdirty: don't forget to save file map softdiry bit on unmap	2014-06-04 16:53:56 -07:00
shmem.c	mm: Initialize error in shmem_file_aio_read()	2014-04-13 14:10:26 -07:00
slab.c	sl[au]b: charge slabs to kmemcg explicitly	2014-06-04 16:53:56 -07:00
slab.h	sl[au]b: charge slabs to kmemcg explicitly	2014-06-04 16:53:56 -07:00
slab_common.c	slab: document kmalloc_order	2014-06-04 16:53:58 -07:00
slob.c	mm: slab/slub: use page->list consistently instead of page->lru	2014-04-11 10:06:06 +03:00
slub.c	mm: get rid of __GFP_KMEMCG	2014-06-04 16:53:56 -07:00
sparse-vmemmap.c	mm/sparse: use memblock apis for early memory allocations	2014-01-21 16:19:47 -08:00
sparse.c	mm: use macros from compiler.h instead of __attribute__((...))	2014-04-07 16:35:54 -07:00
swap.c	mm: thrash detection-based file cache sizing	2014-04-03 16:21:01 -07:00
swap_state.c	swap: add a simple detector for inappropriate swapin readahead	2014-02-06 13:48:51 -08:00
swapfile.c	mm/swap: fix race on swap_info reuse between swapoff and swapon	2014-02-06 13:48:51 -08:00
truncate.c	mm: filemap: update find_get_pages_tag() to deal with shadow entries	2014-05-06 13:04:59 -07:00
util.c	nick kvfree() from apparmor	2014-05-06 14:02:53 -04:00
vmacache.c	mm,vmacache: optimize overflow system-wide flushing	2014-06-04 16:53:57 -07:00
vmalloc.c	mm/vmalloc.c: enhance vm_map_ram() comment	2014-04-07 16:35:55 -07:00
vmpressure.c	arm, pm, vmpressure: add missing slab.h includes	2014-02-03 13:24:01 -05:00
vmscan.c	mm: only force scan in reclaim when none of the LRUs are big enough.	2014-06-04 16:53:56 -07:00
vmstat.c	mm,vmacache: add debug data	2014-06-04 16:53:57 -07:00
workingset.c	mm: keep page cache radix tree nodes in check	2014-04-03 16:21:01 -07:00
zbud.c	mm/zbud: fix some trivial typos in comments	2013-09-11 15:57:35 -07:00
zsmalloc.c	zsmalloc: Fix CPU hotplug callback registration	2014-03-20 13:43:45 +01:00
zswap.c	Merge branch 'akpm' (incoming from Andrew)	2014-04-07 16:38:06 -07:00