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Abel Wu c270cf3041 mm/slub.c: branch optimization in free slowpath 
The two conditions are mutually exclusive and gcc compiler will optimise
this into if-else-like pattern.  Given that the majority of free_slowpath
is free_frozen, let's provide some hint to the compilers.

Tests (perf bench sched messaging -g 20 -l 400000, executed 10x
after reboot) are done and the summarized result:

	un-patched	patched
max.	192.316		189.851
min.	187.267		186.252
avg.	189.154		188.086
stdev.	1.37		0.99

Signed-off-by: Abel Wu <wuyun.wu@huawei.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Acked-by: Christoph Lameter <cl@linux.com>
Cc: Pekka Enberg <penberg@kernel.org>
Cc: David Rientjes <rientjes@google.com>
Cc: Joonsoo Kim <iamjoonsoo.kim@lge.com>
Cc: Hewenliang <hewenliang4@huawei.com>
Cc: Hu Shiyuan <hushiyuan@huawei.com>
Link: http://lkml.kernel.org/r/20200813101812.1617-1-wuyun.wu@huawei.com
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2020-10-13 18:38:27 -07:00
..
kasan
Kbuild updates for v5.9
2020-08-09 14:10:26 -07:00
backing-dev.c
bdi: replace BDI_CAP_NO_{WRITEBACK,ACCT_DIRTY} with a single flag
2020-09-24 13:43:39 -06:00
balloon_compaction.c
mm/balloon_compaction: suppress allocation warnings
2019-09-04 07:42:01 -04:00
cleancache.c
Driver Core and debugfs changes for 5.3-rc1
2019-07-12 12:24:03 -07:00
cma_debug.c
debugfs: make sure we can remove u32_array files cleanly
2020-07-10 13:54:00 -07:00
cma.c
cma: don't quit at first error when activating reserved areas
2020-08-12 10:57:57 -07:00
cma.h
mm: cma: fix the name of CMA areas
2020-08-12 10:57:57 -07:00
compaction.c
mm: replace hpage_nr_pages with thp_nr_pages
2020-08-14 19:56:56 -07:00
debug_page_ref.c
…
debug_vm_pgtable.c
Documentation/mm: add descriptions for arch page table helpers
2020-08-07 11:33:23 -07:00
debug.c
mm, dump_page: do not crash with bad compound_mapcount()
2020-08-07 11:33:23 -07:00
dmapool.c
mm/dmapool.c: micro-optimisation remove unnecessary branch
2020-04-07 10:43:42 -07:00
early_ioremap.c
mm/early_ioremap.c: use %pa to print resource_size_t variables
2020-01-31 10:30:38 -08:00
fadvise.c
mm: return void from various readahead functions
2020-06-02 10:59:06 -07:00
failslab.c
mm/failslab.c: by default, do not fail allocations with direct reclaim only
2019-07-12 11:05:43 -07:00
filemap.c
block-5.10-2020-10-12
2020-10-13 12:12:44 -07:00
frame_vector.c
mmap locking API: convert mmap_sem comments
2020-06-09 09:39:14 -07:00
frontswap.c
mm/frontswap: mark various intentional data races
2020-08-14 19:56:56 -07:00
gup_benchmark.c
mm/gup_benchmark: support pin_user_pages() and related calls
2020-04-02 09:35:27 -07:00
gup.c
mm: do not rely on mm == current->mm in __get_user_pages_locked
2020-09-28 09:21:50 -07:00
highmem.c
mm, x86/mm: Untangle address space layout definitions from basic pgtable type definitions
2019-12-10 10:12:55 +01:00
hmm.c
mm: do page fault accounting in handle_mm_fault
2020-08-12 10:58:02 -07:00
huge_memory.c
arm64 updates for 5.10
2020-10-12 10:00:51 -07:00
hugetlb_cgroup.c
hugetlb_cgroup: convert comma to semicolon
2020-08-21 09:52:52 -07:00
hugetlb.c
mm/hugetlb: fix a race between hugetlb sysctl handlers
2020-09-05 12:14:30 -07:00
hwpoison-inject.c
mm/hwpoison-inject: use DEFINE_DEBUGFS_ATTRIBUTE to define debugfs fops
2019-12-01 12:59:09 -08:00
init-mm.c
mmap locking API: add MMAP_LOCK_INITIALIZER
2020-06-09 09:39:14 -07:00
internal.h
mm: replace hpage_nr_pages with thp_nr_pages
2020-08-14 19:56:56 -07:00
interval_tree.c
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 248
2019-06-19 17:09:08 +02:00
ioremap.c
mm: move p?d_alloc_track to separate header file
2020-08-07 11:33:26 -07:00
Kconfig
Fix references to nommu-mmap.rst
2020-09-24 11:03:40 -06:00
Kconfig.debug
treewide: replace '---help---' in Kconfig files with 'help'
2020-06-14 01:57:21 +09:00
khugepaged.c
mm: khugepaged: recalculate min_free_kbytes after memory hotplug as expected by khugepaged
2020-10-11 10:31:11 -07:00
kmemleak-test.c
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 333
2019-06-05 17:37:06 +02:00
kmemleak.c
mm/kmemleak: silence KCSAN splats in checksum
2020-08-14 19:56:56 -07:00
ksm.c
ksm: reinstate memcg charge on copied pages
2020-09-19 13:13:38 -07:00
list_lru.c
mm/list_lru: fix a data race in list_lru_count_one
2020-08-14 19:56:57 -07:00
maccess.c
uaccess: add force_uaccess_{begin,end} helpers
2020-08-12 10:57:59 -07:00
madvise.c
mm: validate pmd after splitting
2020-09-26 10:48:08 -07:00
Makefile
mm: move lib/ioremap.c to mm/
2020-08-07 11:33:26 -07:00
mapping_dirty_helpers.c
mm/mapping_dirty_helpers: update huge page-table entry callbacks
2020-04-02 09:35:29 -07:00
memblock.c
mm/memblock: expose only miminal interface to add/walk physmem
2020-07-10 15:08:09 +02:00
memcontrol.c
block-5.10-2020-10-12
2020-10-13 12:12:44 -07:00
memfd.c
mm: page cache: store only head pages in i_pages
2019-09-24 15:54:08 -07:00
memory_hotplug.c
mm: don't rely on system state to detect hot-plug operations
2020-09-26 10:33:57 -07:00
memory-failure.c
bdi: replace BDI_CAP_NO_{WRITEBACK,ACCT_DIRTY} with a single flag
2020-09-24 13:43:39 -06:00
memory.c
mm: avoid early COW write protect games during fork()
2020-10-08 10:11:32 -07:00
mempolicy.c
mm: replace hpage_nr_pages with thp_nr_pages
2020-08-14 19:56:56 -07:00
mempool.c
mm/mempool: fix a data race in mempool_free()
2020-08-14 19:56:57 -07:00
memremap.c
memremap: rename MEMORY_DEVICE_DEVDAX to MEMORY_DEVICE_GENERIC
2020-09-04 09:59:59 +02:00
memtest.c
…
migrate.c
block-5.10-2020-10-12
2020-10-13 12:12:44 -07:00
mincore.c
mmap locking API: use coccinelle to convert mmap_sem rwsem call sites
2020-06-09 09:39:14 -07:00
mlock.c
mlock: fix unevictable_pgs event counts on THP
2020-09-19 13:13:38 -07:00
mm_init.c
mm: adjust vm_committed_as_batch according to vm overcommit policy
2020-08-07 11:33:26 -07:00
mmap.c
block-5.10-2020-10-12
2020-10-13 12:12:44 -07:00
mmu_gather.c
mmap locking API: convert mmap_sem comments
2020-06-09 09:39:14 -07:00
mmu_notifier.c
mm: mmu_notifier: fix and extend kerneldoc
2020-08-12 10:57:57 -07:00
mmzone.c
…
mprotect.c
mm: Introduce arch_validate_flags()
2020-09-04 12:46:07 +01:00
mremap.c
mm/mremap: start addresses are properly aligned
2020-08-07 11:33:27 -07:00
msync.c
mmap locking API: use coccinelle to convert mmap_sem rwsem call sites
2020-06-09 09:39:14 -07:00
nommu.c
Fix references to nommu-mmap.rst
2020-09-24 11:03:40 -06:00
oom_kill.c
mm, oom: show process exiting information in __oom_kill_process()
2020-08-12 10:57:56 -07:00
page_alloc.c
mm: khugepaged: recalculate min_free_kbytes after memory hotplug as expected by khugepaged
2020-10-11 10:31:11 -07:00
page_counter.c
mm/page_counter: fix various data races at memsw
2020-08-14 19:56:57 -07:00
page_ext.c
mm/page_ext.c: drop pfn_present() check when onlining
2020-04-07 10:43:40 -07:00
page_idle.c
mm/page_idle.c: skip offline pages
2020-06-08 11:05:55 -07:00
page_io.c
block-5.10-2020-10-12
2020-10-13 12:12:44 -07:00
page_isolation.c
mm/memory_hotplug: drain per-cpu pages again during memory offline
2020-09-19 13:13:39 -07:00
page_owner.c
mm: rename gfpflags_to_migratetype to gfp_migratetype for same convention
2020-06-03 20:09:45 -07:00
page_poison.c
mm/page_poison.c: fix a typo in a comment
2019-09-24 15:54:08 -07:00
page_reporting.c
mm/page_reporting: add budget limit on how many pages can be reported per pass
2020-04-07 10:43:39 -07:00
page_reporting.h
mm: introduce include/linux/pgtable.h
2020-06-09 09:39:13 -07:00
page_vma_mapped.c
mm: replace hpage_nr_pages with thp_nr_pages
2020-08-14 19:56:56 -07:00
page-writeback.c
bdi: replace BDI_CAP_NO_{WRITEBACK,ACCT_DIRTY} with a single flag
2020-09-24 13:43:39 -06:00
pagewalk.c
mmap locking API: convert mmap_sem comments
2020-06-09 09:39:14 -07:00
percpu-internal.h
mm: memcg/percpu: account percpu memory to memory cgroups
2020-08-12 10:57:55 -07:00
percpu-km.c
mm: memcg/percpu: account percpu memory to memory cgroups
2020-08-12 10:57:55 -07:00
percpu-stats.c
mm: memcg/percpu: account percpu memory to memory cgroups
2020-08-12 10:57:55 -07:00
percpu-vm.c
mm: memcg/percpu: account percpu memory to memory cgroups
2020-08-12 10:57:55 -07:00
percpu.c
percpu: fix first chunk size calculation for populated bitmap
2020-09-17 17:34:39 +00:00
pgalloc-track.h
mm: move p?d_alloc_track to separate header file
2020-08-07 11:33:26 -07:00
pgtable-generic.c
mm: introduce include/linux/pgtable.h
2020-06-09 09:39:13 -07:00
process_vm_access.c
mm: remove compat_process_vm_{readv,writev}
2020-10-03 00:02:15 -04:00
ptdump.c
mmap locking API: use coccinelle to convert mmap_sem rwsem call sites
2020-06-09 09:39:14 -07:00
readahead.c
mm: use memalloc_nofs_save in readahead path
2020-06-02 10:59:07 -07:00
rmap.c
mm/rmap: fixup copying of soft dirty and uffd ptes
2020-09-05 12:14:30 -07:00
rodata_test.c
mm/rodata_test.c: fix missing function declaration
2020-08-21 09:52:53 -07:00
shmem.c
arm64 updates for 5.10
2020-10-12 10:00:51 -07:00
shuffle.c
mm/shuffle: remove dynamic reconfiguration
2020-08-07 11:33:29 -07:00
shuffle.h
mm/shuffle: remove dynamic reconfiguration
2020-08-07 11:33:29 -07:00
slab_common.c
mm/slab_common.c: delete duplicated word
2020-08-12 10:57:58 -07:00
slab.c
mm/slab.c: clean code by removing redundant if condition
2020-10-13 18:38:27 -07:00
slab.h
mm: slab: rename (un)charge_slab_page() to (un)account_slab_page()
2020-08-07 11:33:25 -07:00
slob.c
mm: memcg: convert vmstat slab counters to bytes
2020-08-07 11:33:24 -07:00
slub.c
mm/slub.c: branch optimization in free slowpath
2020-10-13 18:38:27 -07:00
sparse-vmemmap.c
mm/sparse: only sub-section aligned range would be populated
2020-08-07 11:33:27 -07:00
sparse.c
mm/sparse: cleanup the code surrounding memory_present()
2020-08-07 11:33:27 -07:00
swap_cgroup.c
mm: memcontrol: make swap tracking an integral part of memory control
2020-06-03 20:09:48 -07:00
swap_slots.c
mm/swap_slots.c: remove redundant check for swap_slot_cache_initialized
2020-08-07 11:33:24 -07:00
swap_state.c
mm/swap_state: mark various intentional data races
2020-08-14 19:56:57 -07:00
swap.c
Merge branch 'locking/urgent' into locking/core, to pick up fixes
2020-10-09 08:55:17 +02:00
swapfile.c
block-5.10-2020-10-12
2020-10-13 12:12:44 -07:00
truncate.c
mm/thp: allow dropping THP from page cache
2019-10-19 06:32:33 -04:00
usercopy.c
mm/usercopy.c: delete duplicated word
2020-08-12 10:57:58 -07:00
userfaultfd.c
mm/vmscan: protect the workingset on anonymous LRU
2020-08-12 10:57:55 -07:00
util.c
arm64: mte: Tags-aware aware memcmp_pages() implementation
2020-09-04 12:46:07 +01:00
vmacache.c
kernel: better document the use_mm/unuse_mm API contract
2020-06-10 19:14:18 -07:00
vmalloc.c
mm/vunmap: add cond_resched() in vunmap_pmd_range
2020-08-21 09:52:53 -07:00
vmpressure.c
mm: vmpressure: use mem_cgroup_is_root API
2020-04-02 09:35:31 -07:00
vmscan.c
mm: fix check_move_unevictable_pages() on THP
2020-09-19 13:13:38 -07:00
vmstat.c
Merge branch 'simplify-do_wp_page'
2020-09-04 09:31:54 -07:00
workingset.c
mm: replace hpage_nr_pages with thp_nr_pages
2020-08-14 19:56:56 -07:00
z3fold.c
mm/z3fold: silence kmemleak false positives of slots
2020-05-28 11:35:40 -07:00
zbud.c
mm: use false for bool variable
2020-06-04 19:06:24 -07:00
zpool.c
mm/zpool.c: delete duplicated word and fix grammar
2020-08-12 10:57:58 -07:00
zsmalloc.c
mm/zsmalloc.c: fix duplicated words
2020-08-12 10:57:58 -07:00
zswap.c
mm/zswap: allow setting default status, compressor and allocator in Kconfig
2020-04-07 10:43:41 -07:00