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ea6eabb05b
linux/mm
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Christian Borntraeger ea6eabb05b mm/debug_pagealloc: ask users for default setting of debug_pagealloc 
Since commit 031bc5743f158 ("mm/debug-pagealloc: make debug-pagealloc
boottime configurable") CONFIG_DEBUG_PAGEALLOC is by default not adding
any page debugging.

This resulted in several unnoticed bugs, e.g.

    https://lkml.kernel.org/g/<569F5E29.3090107@de.ibm.com>
or
    https://lkml.kernel.org/g/<56A20F30.4050705@de.ibm.com>

as this behaviour change was not even documented in Kconfig.

Let's provide a new Kconfig symbol that allows to change the default
back to enabled, e.g.  for debug kernels.  This also makes the change
obvious to kernel packagers.

Let's also change the Kconfig description for CONFIG_DEBUG_PAGEALLOC, to
indicate that there are two stages of overhead.

Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
Cc: Joonsoo Kim <iamjoonsoo.kim@lge.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2016-03-15 16:55:16 -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.c: __compact_pgdat() code cleanuup
2016-01-14 16:00:49 -08:00
debug-pagealloc.c
mm/debug-pagealloc: make debug-pagealloc boottime configurable
2014-12-13 12:42:48 -08:00
debug.c
mm: rework mapcount accounting to enable 4k mapping of THPs
2016-01-15 17:56:32 -08:00
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: __delete_from_page_cache show Bad page if mapped
2016-03-09 15:43:42 -08:00
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: call pmdp_invalidate() with correct virtual address
2016-02-24 10:46:30 -08:00
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
mm: polish virtual memory accounting
2016-02-03 08:28:43 -08:00
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/debug_pagealloc: ask users for default setting of debug_pagealloc
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/huge_memory.c: don't split THP page when MADV_FREE syscall is called
2016-01-15 17:56:32 -08:00
Makefile
media updates for v4.3-rc1
2015-09-11 16:42:39 -07:00
memblock.c
memblock: don't mark memblock_phys_mem_size() as __init
2016-02-05 18:10:40 -08:00
memcontrol.c
thp: change pmd_trans_huge_lock() interface to return ptl
2016-01-21 17:20:51 -08:00
memory_hotplug.c
xen, mm: Set IORESOURCE_SYSTEM_RAM to System RAM
2016-01-30 09:49:58 +01:00
memory-failure.c
mm: soft-offline: exit with failure for non anonymous thp
2016-01-15 17:56:32 -08:00
memory.c
mm: thp: fix SMP race condition between THP page fault and MADV_DONTNEED
2016-02-27 10:28:52 -08:00
mempolicy.c
mm, thp: fix migration of PTE-mapped transparent huge pages
2016-03-09 15:43:42 -08:00
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: numa: quickly fail allocations for NUMA balancing on full nodes
2016-02-27 10:28:52 -08:00
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
mm: fix regression in remap_file_pages() emulation
2016-02-18 16:23:24 -08:00
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, shmem: add internal shmem resident memory accounting
2016-01-14 16:00:49 -08:00
page_alloc.c
mm/debug_pagealloc: ask users for default setting of debug_pagealloc
2016-03-15 16:55:16 -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: introduce idle page tracking
2015-09-10 13:29:01 -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: set correct gfp_mask on page_owner
2015-07-17 16:39:54 -07:00
page-writeback.c
mm/page-writeback: fix dirty_ratelimit calculation
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: fix locking order in mm_take_all_locks()
2016-01-15 17:56:32 -08:00
shmem.c
make sure that freeing shmem fast symlinks is RCU-delayed
2016-01-22 18:08:52 -05:00
slab_common.c
mm: new API kfree_bulk() for SLAB+SLUB allocators
2016-03-15 16:55:16 -07:00
slab.c
mm/slab: re-implement pfmemalloc support
2016-03-15 16:55:16 -07:00
slab.h
slub: convert SLAB_DEBUG_FREE to SLAB_CONSISTENCY_CHECKS
2016-03-15 16:55:16 -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/slub: support left redzone
2016-03-15 16:55:16 -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
dax: support dirty DAX entries in radix tree
2016-01-22 17:02:18 -08:00
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.c: use macro IS_ALIGNED to judge the aligment
2016-01-15 17:56:32 -08:00
vmpressure.c
mm/vmpressure.c: fix subtree pressure detection
2016-02-03 08:28:43 -08:00
vmscan.c
mm: downgrade VM_BUG in isolate_lru_page() to warning
2016-02-05 18:10:40 -08:00
vmstat.c
vmstat: make vmstat_update deferrable
2016-02-05 18:10:40 -08:00
workingset.c
dax: support dirty DAX entries in radix tree
2016-01-22 17:02:18 -08:00
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