zijun_hu 8f6066049c mm/percpu.c: fix panic triggered by BUG_ON() falsely ...

As shown by pcpu_build_alloc_info(), the number of units within a percpu
group is deduced by rounding up the number of CPUs within the group to
@upa boundary/ Therefore, the number of CPUs isn't equal to the units's
if it isn't aligned to @upa normally.  However, pcpu_page_first_chunk()
uses BUG_ON() to assert that one number is equal to the other roughly,
so a panic is maybe triggered by the BUG_ON() incorrectly.

In order to fix this issue, the number of CPUs is rounded up then
compared with units's and the BUG_ON() is replaced with a warning and
return of an error code as well, to keep system alive as much as
possible.

Link: http://lkml.kernel.org/r/57FCF07C.2020103@zoho.com
Signed-off-by: zijun_hu <zijun_hu@htc.com>
Cc: Tejun Heo <tj@kernel.org>
Cc: Christoph Lameter <cl@linux.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

2016-12-12 18:55:09 -08:00

..

kasan

kasan: eliminate long stalls during quarantine reduction

2016-12-12 18:55:09 -08:00

backing-dev.c

block: fix bdi vs gendisk lifetime mismatch

2016-08-04 14:19:16 -06:00

balloon_compaction.c

mm: balloon: use general non-lru movable page feature

2016-07-26 16:19:19 -07:00

bootmem.c

mm: kmemleak: avoid using __va() on addresses that don't have a lowmem mapping

2016-10-11 15:06:33 -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: check the max limit for cma allocation

2016-11-11 08:12:37 -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: fix NR_ISOLATED_* stats for pfn based migration

2016-12-12 18:55:07 -08:00

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, debug: print raw struct page data in __dump_page()

2016-12-12 18:55:08 -08:00

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/fadvise.c: do not discard partial pages with POSIX_FADV_DONTNEED

2016-06-09 14:23:11 -07:00

failslab.c

mm: fault-inject take over bootstrap kmem_cache check

2016-03-15 16:55:16 -07:00

filemap.c

mm: workingset: restore refault tracking for single-page files

2016-12-12 18:55:08 -08:00

frame_vector.c

mm: replace get_vaddr_frames() write/force parameters with gup_flags

2016-10-19 08:11:24 -07:00

frontswap.c

mm, frontswap: convert frontswap_enabled to static key

2016-07-26 16:19:19 -07:00

gup.c

mm: fix up get_user_pages* comments

2016-12-12 18:55:07 -08:00

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

mm: make transparent hugepage size public

2016-12-12 18:55:09 -08:00

hugetlb_cgroup.c

mm, hugetlb_cgroup: round limit_in_bytes down to hugepage size

2016-05-20 17:58:30 -07:00

hugetlb.c

mm: add tlb_remove_check_page_size_change to track page size change

2016-12-12 18:55:07 -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

atomic: use <linux/atomic.h>

2011-07-26 16:49:47 -07:00

internal.h

mm, compaction: make full priority ignore pageblock suitability

2016-10-07 18:46:29 -07:00

interval_tree.c

mm: replace vma->sharead.linear with vma->shared

2015-02-10 14:30:31 -08:00

Kconfig

mm: THP page cache support for ppc64

2016-12-12 18:55:08 -08:00

Kconfig.debug

PM / Hibernate: allow hibernation with PAGE_POISONING_ZERO

2016-09-13 02:35:27 +02:00

khugepaged.c

mm: THP page cache support for ppc64

2016-12-12 18:55:08 -08:00

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

kmemleak: fix reference to Documentation

2016-12-12 18:55:07 -08:00

ksm.c

mm,ksm: add __GFP_HIGH to the allocation in alloc_stable_node()

2016-10-07 18:46:29 -07:00

list_lru.c

mm/list_lru.c: avoid error-path NULL pointer deref

2016-10-27 18:43:42 -07:00

maccess.c

x86: remove more uaccess_32.h complexity

2016-05-22 17:21:27 -07:00

madvise.c

mm: add tlb_remove_check_page_size_change to track page size change

2016-12-12 18:55:07 -08:00

Makefile

Disable the __builtin_return_address() warning globally after all

2016-10-12 10:23:41 -07:00

memblock.c

mm: kmemleak: avoid using __va() on addresses that don't have a lowmem mapping

2016-10-11 15:06:33 -07:00

memcontrol.c

mm: memcontrol: use special workqueue for creating per-memcg caches

2016-12-12 18:55:06 -08:00

memory_hotplug.c

mm: remove x86-only restriction of movable_node

2016-12-12 18:55:07 -08:00

memory-failure.c

mm: hwpoison: fix thp split handling in memory_failure()

2016-11-11 08:12:37 -08:00

memory.c

mm: THP page cache support for ppc64

2016-12-12 18:55:08 -08:00

mempolicy.c

mm/mempolicy.c: forbid static or relative flags for local NUMA mode

2016-12-12 18:55:07 -08:00

mempool.c

Revert "mm, mempool: only set __GFP_NOMEMALLOC if there are free elements"

2016-07-28 16:07:41 -07:00

memtest.c

memtest: remove unused header files

2015-09-08 15:35:28 -07:00

migrate.c

lib: radix-tree: check accounting of existing slot replacement users

2016-12-12 18:55:08 -08:00

mincore.c

mm, swap: use offset of swap entry as key of swap cache

2016-10-07 18:46:28 -07:00

mlock.c

thp: fix corner case of munlock() of PTE-mapped THPs

2016-11-30 16:32:52 -08:00

mm_init.c

mm: convert printk(KERN_<LEVEL> to pr_<level>

2016-03-17 15:09:34 -07:00

mmap.c

mm: vma_merge: correct false positive from __vma_unlink->validate_mm_rb

2016-10-07 18:46:29 -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, page_alloc: inline the fast path of the zonelist iterator

2016-05-19 19:12:14 -07:00

mprotect.c

mm/pkeys: generate pkey system call code only if ARCH_HAS_PKEYS is selected

2016-12-12 18:55:07 -08:00

mremap.c

mremap: move_ptes: check pte dirty after its removal

2016-11-29 08:20:24 -08:00

msync.c

mm/msync: use offset_in_page macro

2015-11-05 19:34:48 -08:00

nobootmem.c

mm: kmemleak: avoid using __va() on addresses that don't have a lowmem mapping

2016-10-11 15:06:33 -07:00

nommu.c

mm: unexport __get_user_pages()

2016-10-24 19:13:20 -07:00

oom_kill.c

oom: print nodemask in the oom report

2016-10-07 18:46:29 -07:00

page_alloc.c

mm, page_alloc: keep pcp count and list contents in sync if struct page is corrupted

2016-12-12 18:55:08 -08:00

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_ext: support extra space allocation by page_ext user

2016-10-07 18:46:27 -07:00

page_idle.c

mm, vmscan: move lru_lock to the node

2016-07-28 16:07:41 -07:00

page_io.c

mm/page_io.c: replace some BUG_ON()s with VM_BUG_ON_PAGE()

2016-10-07 18:46:29 -07:00

page_isolation.c

mm/page_isolation: fix typo: "paes" -> "pages"

2016-10-07 18:46:29 -07:00

page_owner.c

mm/page_owner: don't define fields on struct page_ext by hard-coding

2016-10-07 18:46:27 -07:00

page_poison.c

mm: check the return value of lookup_page_ext for all call sites

2016-06-03 15:06:22 -07:00

page-writeback.c

mm: don't use radix tree writeback tags for pages in swap cache

2016-10-07 18:46:28 -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.c: fix panic triggered by BUG_ON() falsely

2016-12-12 18:55:09 -08:00

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: remove write/force parameters from __get_user_pages_unlocked()

2016-10-18 14:13:37 -07:00

quicklist.c

fix Christoph's email addresses

2016-03-17 15:09:34 -07:00

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

lib: radix-tree: update callback for changing leaf nodes

2016-12-12 18:55:08 -08:00

slab_common.c

mm/slab_common.c: check kmem_create_cache flags are common

2016-12-12 18:55:06 -08:00

slab.c

mm, slab: maintain total slab count instead of active count

2016-12-12 18:55:07 -08:00

slab.h

mm, slab: maintain total slab count instead of active count

2016-12-12 18:55:07 -08:00

slob.c

slub: move synchronize_sched out of slab_mutex on shrink

2016-12-12 18:55:06 -08:00

slub.c

slub: avoid false-postive warning

2016-12-12 18:55:06 -08:00

sparse-vmemmap.c

treewide: replace obsolete _refok by __ref

2016-08-02 17:31:41 -04:00

sparse.c

treewide: replace obsolete _refok by __ref

2016-08-02 17:31:41 -04:00

swap_cgroup.c

mm: convert printk(KERN_<LEVEL> to pr_<level>

2016-03-17 15:09:34 -07:00

swap_state.c

mm, swap: use offset of swap entry as key of swap cache

2016-10-07 18:46:28 -07:00

swap.c

thp: reduce usage of huge zero page's atomic counter

2016-10-07 18:46:28 -07:00

swapfile.c

mm: add three more cond_resched() in swapoff

2016-12-12 18:55:08 -08:00

truncate.c

mm: workingset: move shadow entry tracking to radix tree exceptional tracking

2016-12-12 18:55:08 -08:00

usercopy.c

mm: usercopy: Check for module addresses

2016-09-20 16:07:39 -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

Merge branch 'mm-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

2016-10-22 09:39:10 -07:00

vmacache.c

mm: unrig VMA cache hit ratio

2016-10-07 18:46:27 -07:00

vmalloc.c

mm: add preempt points into __purge_vmap_area_lazy()

2016-12-12 18:55:08 -08:00

vmpressure.c

mm/vmpressure.c: fix subtree pressure detection

2016-02-03 08:28:43 -08:00

vmscan.c

mm/vmscan.c: set correct defer count for shrinker

2016-12-12 18:55:07 -08:00

vmstat.c

seq/proc: modify seq_put_decimal_[u]ll to take a const char *, not char

2016-10-07 18:46:30 -07:00

workingset.c

mm: workingset: update shadow limit to reflect bigger active list

2016-12-12 18:55:08 -08:00

z3fold.c

mm/z3fold.c: avoid modifying HEADLESS page and minor cleanup

2016-06-03 16:02:55 -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: Delete an unnecessary check before the function call "iput"

2016-07-28 16:07:41 -07:00

zswap.c

mm/zswap: use workqueue to destroy pool

2016-05-20 17:58:30 -07:00