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Joonsoo Kim f48d97f340 mm/vmalloc: query dynamic DEBUG_PAGEALLOC setting 
As CONFIG_DEBUG_PAGEALLOC can be enabled/disabled via kernel parameters
we can optimize some cases by checking the enablement state.

This is follow-up work for Christian's Optimize CONFIG_DEBUG_PAGEALLOC:

  https://lkml.org/lkml/2016/1/27/194

Remaining work is to make sparc to be aware of this but it looks not
easy for me so I skip that in this series.

This patch (of 5):

We can disable debug_pagealloc processing even if the code is complied
with CONFIG_DEBUG_PAGEALLOC.  This patch changes the code to query
whether it is enabled or not in runtime.

[akpm@linux-foundation.org: update comment, per David.  Adjust comment to use 80 cols]
Signed-off-by: Joonsoo Kim <iamjoonsoo.kim@lge.com>
Reviewed-by: Christian Borntraeger <borntraeger@de.ibm.com>
Acked-by: David Rientjes <rientjes@google.com>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Takashi Iwai <tiwai@suse.com>
Cc: Chris Metcalf <cmetcalf@ezchip.com>
Cc: Christoph Lameter <cl@linux.com>
Cc: Pekka Enberg <penberg@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2016-03-17 15:09:34 -07:00
..
kasan
kasan: add functions to clear stack poison
2016-03-09 15:43:42 -08:00
backing-dev.c
mm/backing-dev.c: fix error path in wb_init()
2016-02-11 18:35:48 -08:00
balloon_compaction.c
virtio_balloon: fix race between migration and ballooning
2016-01-12 20:47:06 +02:00
bootmem.c
x86/mm: Introduce max_possible_pfn
2015-12-06 12:46:31 +01:00
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: speed up pageblock_pfn_to_page() when zone is contiguous
2016-03-15 16:55:16 -07:00
debug.c
mm, debug: move bad flags printing to bad_page()
2016-03-15 16:55:16 -07:00
dmapool.c
mm, page_alloc: distinguish between being unable to sleep, unwilling to sleep and avoiding waking kswapd
2015-11-06 17:50:42 -08:00
early_ioremap.c
mm/early_ioremap: use offset_in_page macro
2015-11-05 19:34:48 -08:00
fadvise.c
writeback: implement and use inode_congested()
2015-06-02 08:33:35 -06:00
failslab.c
mm: fault-inject take over bootstrap kmem_cache check
2016-03-15 16:55:16 -07:00
filemap.c
mm: remove unnecessary uses of lock_page_memcg()
2016-03-15 16:55:16 -07:00
frame_vector.c
mm: fix docbook comment for get_vaddr_frames()
2015-11-05 19:34:48 -08:00
frontswap.c
frontswap: allow multiple backends
2015-06-24 17:49:45 -07:00
gup.c
mm: retire GUP WARN_ON_ONCE that outlived its usefulness
2016-02-03 08:57:14 -08:00
highmem.c
mm/highmem: make kmap cache coloring aware
2014-08-06 18:01:22 -07:00
huge_memory.c
thp: cleanup split_huge_page()
2016-03-15 16:55:16 -07:00
hugetlb_cgroup.c
mm: make compound_head() robust
2015-11-06 17:50:42 -08:00
hugetlb.c
mm/hugetlb: use EOPNOTSUPP in hugetlb sysctl handlers
2016-03-09 15:43:42 -08:00
hwpoison-inject.c
hwpoison: use page_cgroup_ino for filtering by memcg
2015-09-10 13:29:01 -07:00
init-mm.c
…
internal.h
/proc/kpageflags: return KPF_BUDDY for "tail" buddy pages
2016-03-17 15:09:34 -07:00
interval_tree.c
mm: replace vma->sharead.linear with vma->shared
2015-02-10 14:30:31 -08:00
Kconfig
mm/Kconfig: correct description of DEFERRED_STRUCT_PAGE_INIT
2016-02-05 18:10:40 -08:00
Kconfig.debug
mm/page_poisoning.c: allow for zero poisoning
2016-03-15 16:55:16 -07:00
kmemcheck.c
mm: kmemcheck skip object if slab allocation failed
2016-03-15 16:55:16 -07:00
kmemleak-test.c
mm/kmemleak-test.c: use pr_fmt for logging
2014-06-06 16:08:18 -07:00
kmemleak.c
Revert "gfp: add __GFP_NOACCOUNT"
2016-01-14 16:00:49 -08:00
ksm.c
mm/ksm.c: mark stable page dirty
2016-01-15 17:56:32 -08:00
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/madvise: update comment on sys_madvise()
2016-03-15 16:55:16 -07:00
Makefile
mm/page_poison.c: enable PAGE_POISONING as a separate option
2016-03-15 16:55:16 -07:00
memblock.c
mm/memblock.c: remove unnecessary memblock_type variable
2016-03-15 16:55:16 -07:00
memcontrol.c
mm: memcontrol: report kernel stack usage in cgroup2 memory.stat
2016-03-17 15:09:34 -07:00
memory_hotplug.c
mm/compaction: speed up pageblock_pfn_to_page() when zone is contiguous
2016-03-15 16:55:16 -07:00
memory-failure.c
mm/memory-failure.c: remove useless "undef"s
2016-03-15 16:55:16 -07:00
memory.c
Merge branch 'akpm' (patches from Andrew)
2016-03-16 11:51:08 -07:00
mempolicy.c
mm/mempolicy.c: skip VM_HUGETLB and VM_MIXEDMAP VMA for lazy mbind
2016-03-15 16:55:16 -07:00
mempool.c
mm/mempool: avoid KASAN marking mempool poison checks as use-after-free
2016-03-11 16:17:47 -08:00
memtest.c
memtest: remove unused header files
2015-09-08 15:35:28 -07:00
migrate.c
mm: migrate: consolidate mem_cgroup_migrate() calls
2016-03-15 16:55:16 -07:00
mincore.c
thp: change pmd_trans_huge_lock() interface to return ptl
2016-01-21 17:20:51 -08:00
mlock.c
mm: fix mlock accouting
2016-01-21 17:20:51 -08:00
mm_init.c
mm: meminit: remove mminit_verify_page_links
2015-06-30 19:44:56 -07:00
mmap.c
Linux 4.5-rc7
2016-03-07 09:27:30 +01:00
mmu_context.c
…
mmu_notifier.c
mmu-notifier: add clear_young callback
2015-09-10 13:29:01 -07:00
mmzone.c
mm/mmzone.c: memmap_valid_within() can be boolean
2016-01-14 16:00:49 -08:00
mprotect.c
mm, dax: check for pmd_none() after split_huge_pmd()
2016-02-11 18:35:48 -08:00
mremap.c
mm, dax: check for pmd_none() after split_huge_pmd()
2016-02-11 18:35:48 -08:00
msync.c
mm/msync: use offset_in_page macro
2015-11-05 19:34:48 -08:00
nobootmem.c
x86/mm: Introduce max_possible_pfn
2015-12-06 12:46:31 +01:00
nommu.c
kmemcg: account certain kmem allocations to memcg
2016-01-14 16:00:49 -08:00
oom_kill.c
mm: oom_kill: don't ignore oom score on exiting tasks
2016-03-17 15:09:34 -07:00
page_alloc.c
/proc/kpageflags: return KPF_BUDDY for "tail" buddy pages
2016-03-17 15:09:34 -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
fs: use helper bio_add_page() instead of open coding on bi_io_vec
2015-08-13 12:32:00 -06:00
page_isolation.c
mm/page_isolation: do some cleanup in "undo_isolate_page_range"
2016-01-15 17:56:32 -08:00
page_owner.c
mm, page_owner: dump page owner info from dump_page()
2016-03-15 16:55:16 -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: remove unnecessary uses of lock_page_memcg()
2016-03-15 16:55:16 -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
percpu: implmeent pcpu_nr_empty_pop_pages and chunk->nr_populated
2014-09-02 14:46:05 -04:00
percpu-vm.c
percpu: move region iterations out of pcpu_[de]populate_chunk()
2014-09-02 14:46:02 -04:00
percpu.c
tree wide: use kvfree() than conditional kfree()/vfree()
2016-01-22 17:02:18 -08:00
pgtable-generic.c
mm,thp: fix spellos in describing __HAVE_ARCH_FLUSH_PMD_TLB_RANGE
2016-02-11 18:35:48 -08:00
process_vm_access.c
ptrace: use fsuid, fsgid, effective creds for fs access checks
2016-01-20 17:09:18 -08:00
quicklist.c
…
readahead.c
mm: move lru_to_page to mm_inline.h
2016-01-14 16:00:49 -08:00
rmap.c
mm: simplify lock_page_memcg()
2016-03-15 16:55:16 -07:00
shmem.c
mm: migrate: do not touch page->mem_cgroup of live pages
2016-03-15 16:55:16 -07:00
slab_common.c
mm: new API kfree_bulk() for SLAB+SLUB allocators
2016-03-15 16:55:16 -07:00
slab.c
mm: memcontrol: report slab usage in cgroup2 memory.stat
2016-03-17 15:09:34 -07:00
slab.h
mm: memcontrol: report slab usage in cgroup2 memory.stat
2016-03-17 15:09:34 -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: memcontrol: report slab usage in cgroup2 memory.stat
2016-03-17 15:09:34 -07:00
sparse-vmemmap.c
x86, mm: introduce vmem_altmap to augment vmemmap_populate()
2016-01-15 17:56:32 -08:00
sparse.c
x86, mm: introduce vmem_altmap to augment vmemmap_populate()
2016-01-15 17:56:32 -08:00
swap_cgroup.c
mm: page_cgroup: rename file to mm/swap_cgroup.c
2014-12-10 17:41:09 -08:00
swap_state.c
mm: memcontrol: charge swap to cgroup2
2016-01-20 17:09:18 -08:00
swap.c
mm, x86: get_user_pages() for dax mappings
2016-01-15 17:56:32 -08:00
swapfile.c
wrappers for ->i_mutex access
2016-01-22 18:04:28 -05:00
truncate.c
mm: remove unnecessary uses of lock_page_memcg()
2016-03-15 16:55:16 -07:00
userfaultfd.c
memcg: adjust to support new THP refcounting
2016-01-15 17:56:32 -08:00
util.c
proc: revert /proc/<pid>/maps [stack:TID] annotation
2016-02-03 08:28:43 -08:00
vmacache.c
mm/vmacache: inline vmacache_valid_mm()
2015-11-05 19:34:48 -08:00
vmalloc.c
mm/vmalloc: query dynamic DEBUG_PAGEALLOC setting
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: remove unnecessary uses of lock_page_memcg()
2016-03-15 16:55:16 -07:00
vmstat.c
mm, page_owner: convert page_owner_inited to static key
2016-03-15 16:55:16 -07:00
workingset.c
mm: simplify lock_page_memcg()
2016-03-15 16:55:16 -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 migrate_zspage-zs_free race condition
2016-01-20 17:09:18 -08:00
zswap.c
mm/zswap: change incorrect strncmp use to strcmp
2015-12-18 14:25:40 -08:00