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Mel Gorman b9f00e147f mm, page_alloc: reduce branches in zone_statistics 
zone_statistics has more branches than it really needs to take an
unlikely GFP flag into account.  Reduce the number and annotate the
unlikely flag.

The performance difference on a page allocator microbenchmark is;

                                             4.6.0-rc2                  4.6.0-rc2
                                      nocompound-v1r10           statbranch-v1r10
  Min      alloc-odr0-1               417.00 (  0.00%)           419.00 ( -0.48%)
  Min      alloc-odr0-2               308.00 (  0.00%)           305.00 (  0.97%)
  Min      alloc-odr0-4               253.00 (  0.00%)           250.00 (  1.19%)
  Min      alloc-odr0-8               221.00 (  0.00%)           219.00 (  0.90%)
  Min      alloc-odr0-16              205.00 (  0.00%)           203.00 (  0.98%)
  Min      alloc-odr0-32              199.00 (  0.00%)           195.00 (  2.01%)
  Min      alloc-odr0-64              193.00 (  0.00%)           191.00 (  1.04%)
  Min      alloc-odr0-128             191.00 (  0.00%)           189.00 (  1.05%)
  Min      alloc-odr0-256             200.00 (  0.00%)           198.00 (  1.00%)
  Min      alloc-odr0-512             212.00 (  0.00%)           210.00 (  0.94%)
  Min      alloc-odr0-1024            219.00 (  0.00%)           216.00 (  1.37%)
  Min      alloc-odr0-2048            225.00 (  0.00%)           221.00 (  1.78%)
  Min      alloc-odr0-4096            231.00 (  0.00%)           227.00 (  1.73%)
  Min      alloc-odr0-8192            234.00 (  0.00%)           232.00 (  0.85%)
  Min      alloc-odr0-16384           234.00 (  0.00%)           232.00 (  0.85%)

Signed-off-by: Mel Gorman <mgorman@techsingularity.net>
Acked-by: Vlastimil Babka <vbabka@suse.cz>
Cc: Jesper Dangaard Brouer <brouer@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2016-05-19 19:12:14 -07:00
..
kasan
mm, kasan: fix compilation for CONFIG_SLAB
2016-04-01 17:03:37 -05:00
backing-dev.c
writeback: fix the wrong congested state variable definition
2016-03-31 12:26:25 -06:00
balloon_compaction.c
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial
2016-03-17 21:38:27 -07:00
bootmem.c
mm: convert printk(KERN_<LEVEL> to pr_<level>
2016-03-17 15:09:34 -07:00
cleancache.c
cleancache: constify cleancache_ops structure
2016-01-27 09:09:57 -05:00
cma_debug.c
mm/cma_debug: correct size input to bitmap function
2015-07-17 16:39:54 -07:00
cma.c
mm/cma.c: suppress warning
2015-11-05 19:34:48 -08:00
cma.h
mm: cma: mark cma_bitmap_maxno() inline in header
2015-08-14 15:56:32 -07:00
compaction.c
mm, compaction: skip blocks where isolation fails in async direct compaction
2016-05-19 19:12:14 -07:00
debug_page_ref.c
mm/page_ref: add tracepoint to track down page reference manipulation
2016-03-17 15:09:34 -07:00
debug.c
mm: introduce page reference manipulation functions
2016-03-17 15:09:34 -07:00
dmapool.c
mm: convert printk(KERN_<LEVEL> to pr_<level>
2016-03-17 15:09:34 -07:00
early_ioremap.c
mm/early_ioremap: use offset_in_page macro
2015-11-05 19:34:48 -08:00
fadvise.c
mm, fs: get rid of PAGE_CACHE_* and page_cache_{get,release} macros
2016-04-04 10:41:08 -07:00
failslab.c
mm: fault-inject take over bootstrap kmem_cache check
2016-03-15 16:55:16 -07:00
filemap.c
mm/page_ref: use page_ref helper instead of direct modification of _count
2016-05-19 19:12:14 -07:00
frame_vector.c
mm/gup: Switch all callers of get_user_pages() to not pass tsk/mm
2016-02-16 10:11:12 +01:00
frontswap.c
frontswap: allow multiple backends
2015-06-24 17:49:45 -07:00
gup.c
Merge branch 'mm-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
2016-04-14 19:31:34 -07:00
highmem.c
mm/highmem: make nr_free_highpages() handles all highmem zones by itself
2016-05-19 19:12:14 -07:00
huge_memory.c
huge mm: move_huge_pmd does not need new_vma
2016-05-19 19:12:14 -07:00
hugetlb_cgroup.c
mm: make compound_head() robust
2015-11-06 17:50:42 -08:00
hugetlb.c
mm/hugetlb: add same zone check in pfn_range_valid_gigantic()
2016-05-19 19:12:14 -07:00
hwpoison-inject.c
hwpoison: use page_cgroup_ino for filtering by memcg
2015-09-10 13:29:01 -07:00
init-mm.c
atomic: use <linux/atomic.h>
2011-07-26 16:49:47 -07:00
internal.h
mm: rename _count, field of the struct page, to _refcount
2016-05-19 19:12:14 -07:00
interval_tree.c
mm: replace vma->sharead.linear with vma->shared
2015-02-10 14:30:31 -08:00
Kconfig
memory_hotplug: introduce CONFIG_MEMORY_HOTPLUG_DEFAULT_ONLINE
2016-05-19 19:12:14 -07:00
Kconfig.debug
mm/page_ref: add tracepoint to track down page reference manipulation
2016-03-17 15:09:34 -07:00
kmemcheck.c
mm: convert printk(KERN_<LEVEL> to pr_<level>
2016-03-17 15:09:34 -07:00
kmemleak-test.c
mm: convert printk(KERN_<LEVEL> to pr_<level>
2016-03-17 15:09:34 -07:00
kmemleak.c
mm: coalesce split strings
2016-03-17 15:09:34 -07:00
ksm.c
ksm: fix conflict between mmput and scan_get_next_rmap_item
2016-05-12 15:52:50 -07:00
list_lru.c
mm: memcontrol: move kmem accounting code to CONFIG_MEMCG
2016-01-20 17:09:18 -08:00
maccess.c
mm/maccess.c: actually return -EFAULT from strncpy_from_unsafe
2015-11-05 19:34:48 -08:00
madvise.c
mm, fs: get rid of PAGE_CACHE_* and page_cache_{get,release} macros
2016-04-04 10:41:08 -07:00
Makefile
mm, kasan: SLAB support
2016-03-25 16:37:42 -07:00
memblock.c
mm: coalesce split strings
2016-03-17 15:09:34 -07:00
memcontrol.c
oom, oom_reaper: try to reap tasks which skip regular OOM killer path
2016-05-19 19:12:14 -07:00
memory_hotplug.c
memory_hotplug: introduce memhp_default_state= command line parameter
2016-05-19 19:12:14 -07:00
memory-failure.c
mm/memory-failure: fix race with compound page split/merge
2016-04-28 19:34:04 -07:00
memory.c
mm: thp: calculate the mapcount correctly for THP pages during WP faults
2016-05-12 15:52:50 -07:00
mempolicy.c
mm/mempolicy.c:offset_il_node() document and clarify
2016-05-19 19:12:14 -07:00
mempool.c
mm, kasan: add GFP flags to KASAN API
2016-03-25 16:37:42 -07:00
memtest.c
memtest: remove unused header files
2015-09-08 15:35:28 -07:00
migrate.c
mm: use __SetPageSwapBacked and dont ClearPageSwapBacked
2016-05-19 19:12:14 -07:00
mincore.c
mm, fs: remove remaining PAGE_CACHE_* and page_cache_{get,release} usage
2016-04-04 10:41:08 -07:00
mlock.c
mm: fix mlock accouting
2016-01-21 17:20:51 -08:00
mm_init.c
mm: convert printk(KERN_<LEVEL> to pr_<level>
2016-03-17 15:09:34 -07:00
mmap.c
mm/mmap: kill hook arch_rebalance_pgtables()
2016-05-19 19:12:14 -07:00
mmu_context.c
mm/mmu_context, sched/core: Fix mmu_context.h assumption
2016-04-28 11:44:19 +02:00
mmu_notifier.c
fix Christoph's email addresses
2016-03-17 15:09:34 -07:00
mmzone.c
mm/mmzone.c: memmap_valid_within() can be boolean
2016-01-14 16:00:49 -08:00
mprotect.c
mm/mprotect.c: don't imply PROT_EXEC on non-exec fs
2016-03-22 15:36:02 -07:00
mremap.c
huge pagecache: extend mremap pmd rmap lockout to files
2016-05-19 19:12:14 -07:00
msync.c
mm/msync: use offset_in_page macro
2015-11-05 19:34:48 -08:00
nobootmem.c
mm: convert printk(KERN_<LEVEL> to pr_<level>
2016-03-17 15:09:34 -07:00
nommu.c
Merge branch 'mm-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
2016-04-14 19:31:34 -07:00
oom_kill.c
mm, oom_reaper: clear TIF_MEMDIE for all tasks queued for oom_reaper
2016-05-19 19:12:14 -07:00
page_alloc.c
mm, page_alloc: use new PageAnonHead helper in the free page fast path
2016-05-19 19:12:14 -07:00
page_counter.c
mm: page_counter: let page_counter_try_charge() return bool
2015-11-05 19:34:48 -08:00
page_ext.c
mm/page_poisoning.c: allow for zero poisoning
2016-03-15 16:55:16 -07:00
page_idle.c
mm: add page_check_address_transhuge() helper
2016-01-15 17:56:32 -08:00
page_io.c
Merge branch 'work.preadv2' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
2016-05-17 15:05:23 -07:00
page_isolation.c
mm/memory_hotplug: add comment to some functions related to memory hotplug
2016-05-19 19:12:14 -07:00
page_owner.c
mm/page_owner: add zone range overlapping check
2016-05-19 19:12:14 -07:00
page_poison.c
mm/page_poisoning.c: allow for zero poisoning
2016-03-15 16:55:16 -07:00
page-writeback.c
mm/writeback: correct dirty page calculation for highmem
2016-05-19 19:12:14 -07:00
pagewalk.c
thp: rename split_huge_page_pmd() to split_huge_pmd()
2016-01-15 17:56:32 -08:00
percpu-km.c
mm: percpu: use pr_fmt to prefix output
2016-03-17 15:09:34 -07:00
percpu-vm.c
percpu: move region iterations out of pcpu_[de]populate_chunk()
2014-09-02 14:46:02 -04:00
percpu.c
mm: percpu: use pr_fmt to prefix output
2016-03-17 15:09:34 -07:00
pgtable-generic.c
mm/thp/migration: switch from flush_tlb_range to flush_pmd_tlb_range
2016-03-17 15:09:34 -07:00
process_vm_access.c
mm/gup: Introduce get_user_pages_remote()
2016-02-16 10:04:09 +01:00
quicklist.c
fix Christoph's email addresses
2016-03-17 15:09:34 -07:00
readahead.c
mm, fs: get rid of PAGE_CACHE_* and page_cache_{get,release} macros
2016-04-04 10:41:08 -07:00
rmap.c
mm: use __SetPageSwapBacked and dont ClearPageSwapBacked
2016-05-19 19:12:14 -07:00
shmem.c
tmpfs: mem_cgroup charge fault to vm_mm not current mm
2016-05-19 19:12:14 -07:00
slab_common.c
mm, kasan: add GFP flags to KASAN API
2016-03-25 16:37:42 -07:00
slab.c
include/linux/nodemask.h: create next_node_in() helper
2016-05-19 19:12:14 -07:00
slab.h
mm, kasan: add GFP flags to KASAN API
2016-03-25 16:37:42 -07:00
slob.c
mm: slab: free kmem_cache_node after destroy sysfs file
2016-02-18 16:23:24 -08:00
slub.c
mm: rename _count, field of the struct page, to _refcount
2016-05-19 19:12:14 -07:00
sparse-vmemmap.c
mm: convert printk(KERN_<LEVEL> to pr_<level>
2016-03-17 15:09:34 -07:00
sparse.c
mm: convert printk(KERN_<LEVEL> to pr_<level>
2016-03-17 15:09:34 -07:00
swap_cgroup.c
mm: convert printk(KERN_<LEVEL> to pr_<level>
2016-03-17 15:09:34 -07:00
swap_state.c
mm: use __SetPageSwapBacked and dont ClearPageSwapBacked
2016-05-19 19:12:14 -07:00
swap.c
thp: keep huge zero page pinned until tlb flush
2016-04-28 19:34:04 -07:00
swapfile.c
mm: thp: calculate the mapcount correctly for THP pages during WP faults
2016-05-12 15:52:50 -07:00
truncate.c
mm, fs: get rid of PAGE_CACHE_* and page_cache_{get,release} macros
2016-04-04 10:41:08 -07:00
userfaultfd.c
mm, fs: get rid of PAGE_CACHE_* and page_cache_{get,release} macros
2016-04-04 10:41:08 -07:00
util.c
mm: uninline page_mapped()
2016-05-19 19:12:14 -07:00
vmacache.c
mm/vmacache: inline vmacache_valid_mm()
2015-11-05 19:34:48 -08:00
vmalloc.c
mm/vmalloc: use PAGE_ALIGNED() to check PAGE_SIZE alignment
2016-03-17 15:09:34 -07:00
vmpressure.c
mm/vmpressure.c: fix subtree pressure detection
2016-02-03 08:28:43 -08:00
vmscan.c
mm: update_lru_size do the __mod_zone_page_state
2016-05-19 19:12:14 -07:00
vmstat.c
mm, page_alloc: reduce branches in zone_statistics
2016-05-19 19:12:14 -07:00
workingset.c
mm: workingset: make shadow node shrinker memcg aware
2016-03-17 15:09:34 -07:00
zbud.c
mm/zbud.c: use list_last_entry() instead of list_tail_entry()
2016-01-15 11:40:52 -08:00
zpool.c
mm: zsmalloc: constify struct zs_pool name
2015-11-06 17:50:42 -08:00
zsmalloc.c
zsmalloc: fix zs_can_compact() integer overflow
2016-05-09 17:40:59 -07:00
zswap.c
mm/zswap: provide unique zpool name
2016-05-05 17:38:53 -07:00