Vlastimil Babka 76741e776a mm, page_alloc: don't convert pfn to idx when merging ... In __free_one_page() we do the buddy merging arithmetics on "page/buddy index", which is just the lower MAX_ORDER bits of pfn. The operations we do that affect the higher bits are bitwise AND and subtraction (in that order), where the final result will be the same with the higher bits left unmasked, as long as these bits are equal for both buddies - which must be true by the definition of a buddy. We can therefore use pfn's directly instead of "index" and skip the zeroing of >MAX_ORDER bits. This can help a bit by itself, although compiler might be smart enough already. It also helps the next patch to avoid page_to_pfn() for memory hole checks. Link: http://lkml.kernel.org/r/20161216120009.20064-1-vbabka@suse.cz Signed-off-by: Vlastimil Babka <vbabka@suse.cz> Acked-by: Mel Gorman <mgorman@techsingularity.net> Cc: Joonsoo Kim <iamjoonsoo.kim@lge.com> Cc: Michal Hocko <mhocko@kernel.org> Cc: "Kirill A. Shutemov" <kirill.shutemov@linux.intel.com> Cc: Johannes Weiner <hannes@cmpxchg.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>		2017-02-22 16:41:27 -08:00
..
kasan	arm64 updates for 4.11:	2017-02-22 10:46:44 -08:00
backing-dev.c	block: fix double-free in the failure path of cgwb_bdi_init()	2017-02-08 13:52:01 -07:00
balloon_compaction.c
bootmem.c
cleancache.c
cma.c	mm/cma: Cleanup highmem check	2017-01-11 13:56:49 +00:00
cma.h
cma_debug.c
compaction.c	mm, compaction: allow compaction for GFP_NOFS requests	2016-12-14 16:04:07 -08:00
debug.c	mm, debug: print raw struct page data in __dump_page()	2016-12-12 18:55:08 -08:00
debug_page_ref.c
dmapool.c
early_ioremap.c
fadvise.c	mm: fadvise: avoid expensive remote LRU cache draining after FADV_DONTNEED	2016-12-20 09:48:46 -08:00
failslab.c
filemap.c	mm, fs: check for fatal signals in do_generic_file_read()	2017-02-03 14:13:19 -08:00
frame_vector.c
frontswap.c
gup.c	mm: unexport __get_user_pages_unlocked()	2016-12-14 16:04:09 -08:00
highmem.c
huge_memory.c	mm/huge_memory.c: respect FOLL_FORCE/FOLL_COW for thp	2017-01-24 16:26:14 -08:00
hugetlb.c	mm/hugetlb.c: fix reservation race when freeing surplus pages	2017-01-10 18:31:55 -08:00
hugetlb_cgroup.c
hwpoison-inject.c
init-mm.c
internal.h	mm, page_alloc: don't convert pfn to idx when merging	2017-02-22 16:41:27 -08:00
interval_tree.c
Kconfig	mm: THP page cache support for ppc64	2016-12-12 18:55:08 -08:00
Kconfig.debug
khugepaged.c	mm: get rid of __GFP_OTHER_NODE	2017-01-10 18:31:55 -08:00
kmemcheck.c
kmemleak-test.c
kmemleak.c	kmemleak: fix reference to Documentation	2016-12-12 18:55:07 -08:00
ksm.c
list_lru.c
maccess.c
madvise.c	mm: add tlb_remove_check_page_size_change to track page size change	2016-12-12 18:55:07 -08:00
Makefile
memblock.c
memcontrol.c	slab: use memcg_kmem_cache_wq for slab destruction operations	2017-02-22 16:41:27 -08:00
memory-failure.c	mm: Use owner_priv bit for PageSwapCache, valid when PageSwapBacked	2016-12-25 11:54:48 -08:00
memory.c	mm, dax: change pmd_fault() to take only vmf parameter	2017-02-22 16:41:26 -08:00
memory_hotplug.c	base/memory, hotplug: fix a kernel oops in show_valid_zones()	2017-02-03 14:13:19 -08:00
mempolicy.c	mm/mempolicy.c: do not put mempolicy before using its nodemask	2017-01-24 16:26:14 -08:00
mempool.c
memtest.c
migrate.c	mm: Use owner_priv bit for PageSwapCache, valid when PageSwapBacked	2016-12-25 11:54:48 -08:00
mincore.c	Replace <asm/uaccess.h> with <linux/uaccess.h> globally	2016-12-24 11:46:01 -08:00
mlock.c	thp: fix corner case of munlock() of PTE-mapped THPs	2016-11-30 16:32:52 -08:00
mm_init.c
mmap.c	Replace <asm/uaccess.h> with <linux/uaccess.h> globally	2016-12-24 11:46:01 -08:00
mmu_context.c
mmu_notifier.c
mmzone.c
mprotect.c	Replace <asm/uaccess.h> with <linux/uaccess.h> globally	2016-12-24 11:46:01 -08:00
mremap.c
msync.c
nobootmem.c
nommu.c	Replace <asm/uaccess.h> with <linux/uaccess.h> globally	2016-12-24 11:46:01 -08:00
oom_kill.c
page-writeback.c	block: Use pointer to backing_dev_info from request_queue	2017-02-02 08:20:48 -07:00
page_alloc.c	mm, page_alloc: don't convert pfn to idx when merging	2017-02-22 16:41:27 -08:00
page_counter.c
page_ext.c
page_idle.c
page_io.c
page_isolation.c	mm, page_alloc: don't convert pfn to idx when merging	2017-02-22 16:41:27 -08:00
page_owner.c
page_poison.c
pagewalk.c
percpu-km.c
percpu-vm.c
percpu.c	Merge branch 'for-4.10' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/percpu	2016-12-13 12:34:47 -08:00
pgtable-generic.c
process_vm_access.c	mm: unexport __get_user_pages_unlocked()	2016-12-14 16:04:09 -08:00
quicklist.c
readahead.c	mm: don't cap request size based on read-ahead setting	2016-12-12 18:55:08 -08:00
rmap.c	mm, rmap: handle anon_vma_prepare() common case inline	2016-12-12 18:55:08 -08:00
shmem.c	tmpfs: change shmem_mapping() to test shmem_aops	2017-02-22 16:41:27 -08:00
slab.c	slab: introduce __kmemcg_cache_deactivate()	2017-02-22 16:41:27 -08:00
slab.h	slab: remove synchronous synchronize_sched() from memcg cache deactivation path	2017-02-22 16:41:27 -08:00
slab_common.c	slab: use memcg_kmem_cache_wq for slab destruction operations	2017-02-22 16:41:27 -08:00
slob.c	slab: introduce __kmemcg_cache_deactivate()	2017-02-22 16:41:27 -08:00
slub.c	slub: make sysfs directories for memcg sub-caches optional	2017-02-22 16:41:27 -08:00
sparse-vmemmap.c
sparse.c
swap.c	mm: add PageWaiters indicating tasks are waiting for a page bit	2016-12-25 11:54:48 -08:00
swap_cgroup.c
swap_state.c
swapfile.c	mm: support anonymous stable page	2017-01-10 18:31:55 -08:00
truncate.c	mm: Invalidate DAX radix tree entries only if appropriate	2016-12-26 20:29:24 -08:00
usercopy.c	mm/usercopy: Switch to using lm_alias	2017-01-11 13:56:50 +00:00
userfaultfd.c
util.c	Replace <asm/uaccess.h> with <linux/uaccess.h> globally	2016-12-24 11:46:01 -08:00
vmacache.c
vmalloc.c	Replace <asm/uaccess.h> with <linux/uaccess.h> globally	2016-12-24 11:46:01 -08:00
vmpressure.c
vmscan.c	mm, memcg: fix the active list aging for lowmem requests when memcg is enabled	2017-01-10 18:31:55 -08:00
vmstat.c	mm/vmstat: Convert to hotplug state machine	2016-12-02 00:52:35 +01:00
workingset.c	mm: workingset: fix use-after-free in shadow node shrinker	2017-01-07 18:22:40 -08:00
z3fold.c
zbud.c
zpool.c
zsmalloc.c	mm/zsmalloc: Convert to hotplug state machine	2016-12-02 00:52:36 +01:00
zswap.c	zswap: disable changing params if init fails	2017-02-03 14:13:19 -08:00