majianpeng 02e1a9cd1e slub: missing test for partial pages flush work in flush_all() ...

I found some kernel messages such as:

    SLUB raid5-md127: kmem_cache_destroy called for cache that still has objects.
    Pid: 6143, comm: mdadm Tainted: G           O 3.4.0-rc6+        #75
    Call Trace:
    kmem_cache_destroy+0x328/0x400
    free_conf+0x2d/0xf0 [raid456]
    stop+0x41/0x60 [raid456]
    md_stop+0x1a/0x60 [md_mod]
    do_md_stop+0x74/0x470 [md_mod]
    md_ioctl+0xff/0x11f0 [md_mod]
    blkdev_ioctl+0xd8/0x7a0
    block_ioctl+0x3b/0x40
    do_vfs_ioctl+0x96/0x560
    sys_ioctl+0x91/0xa0
    system_call_fastpath+0x16/0x1b

Then using kmemleak I found these messages:

    unreferenced object 0xffff8800b6db7380 (size 112):
      comm "mdadm", pid 5783, jiffies 4294810749 (age 90.589s)
      hex dump (first 32 bytes):
        01 01 db b6 ad 4e ad de ff ff ff ff ff ff ff ff  .....N..........
        ff ff ff ff ff ff ff ff 98 40 4a 82 ff ff ff ff  .........@J.....
      backtrace:
        kmemleak_alloc+0x21/0x50
        kmem_cache_alloc+0xeb/0x1b0
        kmem_cache_open+0x2f1/0x430
        kmem_cache_create+0x158/0x320
        setup_conf+0x649/0x770 [raid456]
        run+0x68b/0x840 [raid456]
        md_run+0x529/0x940 [md_mod]
        do_md_run+0x18/0xc0 [md_mod]
        md_ioctl+0xba8/0x11f0 [md_mod]
        blkdev_ioctl+0xd8/0x7a0
        block_ioctl+0x3b/0x40
        do_vfs_ioctl+0x96/0x560
        sys_ioctl+0x91/0xa0
        system_call_fastpath+0x16/0x1b

This bug was introduced by commit a8364d5555b ("slub: only IPI CPUs that
have per cpu obj to flush"), which did not include checks for per cpu
partial pages being present on a cpu.

Signed-off-by: majianpeng <majianpeng@gmail.com>
Cc: Gilad Ben-Yossef <gilad@benyossef.com>
Acked-by: Christoph Lameter <cl@linux.com>
Cc: Pekka Enberg <penberg@kernel.org>
Tested-by: Jeff Layton <jlayton@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

2012-05-17 18:00:51 -07:00

..

backing-dev.c

backing-dev: fix wakeup timer races with bdi_unregister()

2012-02-01 16:52:49 +08:00

bootmem.c

bootmem/sparsemem: remove limit constraint in alloc_bootmem_section

2012-03-21 17:54:58 -07:00

bounce.c

mm: remove the second argument of k[un]map_atomic()

2012-03-20 21:48:27 +08:00

cleancache.c

mm: cleancache: Use __read_mostly as appropiate.

2012-01-23 16:08:09 -05:00

compaction.c

mm: compaction: make compact_control order signed

2012-03-21 17:54:56 -07:00

debug-pagealloc.c

mm, x86: Remove debug_pagealloc_enabled

2011-12-06 09:24:07 +01:00

dmapool.c

mm: fix implicit stat.h usage in dmapool.c

2011-10-31 09:20:12 -04:00

fadvise.c

fadvise: only initiate writeback for specified range with FADV_DONTNEED

2012-01-10 16:30:43 -08:00

failslab.c

switch debugfs to umode_t

2012-01-03 22:54:56 -05:00

filemap_xip.c

mm/filemap_xip.c: fix race condition in xip_file_fault()

2012-02-03 16:16:41 -08:00

filemap.c

radix-tree: use iterators in find_get_pages* functions

2012-03-28 17:14:37 -07:00

fremap.c

mm: delete various needless include <linux/module.h>

2011-10-31 09:20:11 -04:00

highmem.c

Merge branch 'modsplit-Oct31_2011' of git://git.kernel.org/pub/scm/linux/kernel/git/paulg/linux

2011-11-06 19:44:47 -08:00

huge_memory.c

thp: optimize away unnecessary page table locking

2012-03-21 17:54:57 -07:00

hugetlb.c

hugetlb: prevent BUG_ON in hugetlb_fault() -> hugetlb_cow()

2012-05-10 15:06:44 -07:00

hwpoison-inject.c

HWPOISON: Clean up memory_failure() vs. __memory_failure()

2012-01-03 12:06:32 -08:00

init-mm.c

atomic: use <linux/atomic.h>

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

internal.h

mm: thp: tail page refcounting fix

2011-11-02 16:06:57 -07:00

Kconfig

Merge branch 'master' into x86/memblock

2011-11-28 09:46:22 -08:00

Kconfig.debug

mm: more intensive memory corruption debugging

2012-01-10 16:30:42 -08:00

kmemcheck.c

kmemcheck: Fix build errors due to missing slab.h

2010-03-30 22:02:32 +09:00

kmemleak-test.c

kmemleak: remove memset by using kzalloc

2011-01-27 18:31:51 +00:00

kmemleak.c

kmemleak: Disable early logging when kmemleak is off by default

2012-01-20 16:57:05 +00:00

ksm.c

ksm: cleanup: introduce find_mergeable_vma()

2012-03-21 17:54:59 -07:00

maccess.c

mm: Map most files to use export.h instead of module.h

2011-10-31 09:20:12 -04:00

madvise.c

coredump: add VM_NODUMP, MADV_NODUMP, MADV_CLEAR_NODUMP

2012-03-23 16:58:42 -07:00

Makefile

Cross Memory Attach

2011-10-31 17:30:44 -07:00

memblock.c

memblock: memblock should be able to handle zero length operations

2012-04-20 11:18:46 -07:00

memcontrol.c

memcg: free spare array to avoid memory leak

2012-05-10 15:06:44 -07:00

memory_hotplug.c

mm: compaction: introduce sync-light migration for use by compaction

2012-01-12 20:13:09 -08:00

memory-failure.c

Merge branch 'x86-mce-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

2012-03-22 09:42:04 -07:00

memory.c

coredump: remove VM_ALWAYSDUMP flag

2012-03-23 16:58:42 -07:00

mempolicy.c

mm: fix NULL ptr dereference in migrate_pages

2012-04-25 21:26:34 -07:00

mempool.c

mempool: fix first round failure behavior

2012-01-10 16:30:45 -08:00

migrate.c

mm: fix NULL ptr dereference in move_pages

2012-04-25 21:26:34 -07:00

mincore.c

mm: thp: fix pmd_bad() triggering in code paths holding mmap_sem read mode

2012-03-21 17:54:54 -07:00

mlock.c

vm: avoid using find_vma_prev() unnecessarily

2012-03-06 18:23:36 -08:00

mm_init.c

mm: Map most files to use export.h instead of module.h

2011-10-31 09:20:12 -04:00

mmap.c

kill mm argument of vm_munmap()

2012-04-21 01:58:20 -04:00

mmu_context.c

mm, counters: remove task argument to sync_mm_rss() and __sync_task_rss_stat()

2012-03-21 17:54:59 -07:00

mmu_notifier.c

mm: Map most files to use export.h instead of module.h

2011-10-31 09:20:12 -04:00

mmzone.c

mm: delete various needless include <linux/module.h>

2011-10-31 09:20:11 -04:00

mprotect.c

Merge branch 'akpm' (Andrew's patch-bomb)

2012-03-22 09:04:48 -07:00

mremap.c

mm: collapse security_vm_enough_memory() variants into a single function

2012-02-14 10:45:39 +11:00

msync.c

sanitize vfs_fsync calling conventions

2010-05-21 18:31:21 -04:00

nobootmem.c

mm: nobootmem: fix sign extend problem in __free_pages_memory()

2012-05-10 15:06:44 -07:00

nommu.c

kill mm argument of vm_munmap()

2012-04-21 01:58:20 -04:00

oom_kill.c

signal: oom_kill_task: use SEND_SIG_FORCED instead of force_sig()

2012-03-23 16:58:41 -07:00

page_alloc.c

mm: raise MemFree by reverting percpu_pagelist_fraction to 0

2012-05-11 09:23:39 -07:00

page_cgroup.c

page_cgroup: fix horrid swap accounting regression

2012-03-06 08:18:23 -08:00

page_io.c

block: kill off REQ_UNPLUG

2011-03-10 08:52:27 +01:00

page_isolation.c

mm: page_isolation: codeclean fix comment and rm unneeded val init

2010-10-26 16:52:11 -07:00

page-writeback.c

Ext4 commits for 3.3 merge window; mostly cleanups and bug fixes

2012-03-28 10:02:55 -07:00

pagewalk.c

mm: thp: fix pmd_bad() triggering in code paths holding mmap_sem read mode

2012-03-21 17:54:54 -07:00

percpu-km.c

percpu: clear memory allocated with the km allocator

2010-10-02 10:28:42 +03:00

percpu-vm.c

percpu: use bitmap_clear

2012-01-20 09:23:16 -08:00

percpu.c

kmemleak: Fix the kmemleak tracking of the percpu areas with !SMP

2012-05-09 10:13:29 -07:00

pgtable-generic.c

thp: add HPAGE_PMD_* definitions for !CONFIG_TRANSPARENT_HUGEPAGE

2012-03-21 17:55:02 -07:00

prio_tree.c

sanitize <linux/prefetch.h> usage

2011-05-20 12:50:29 -07:00

process_vm_access.c

Fix race in process_vm_rw_core

2012-02-02 12:55:17 -08:00

quicklist.c

mm: delete various needless include <linux/module.h>

2011-10-31 09:20:11 -04:00

readahead.c

mm: Map most files to use export.h instead of module.h

2011-10-31 09:20:12 -04:00

rmap.c

memcg: use new logic for page stat accounting

2012-03-21 17:55:01 -07:00

shmem.c

Merge branch 'akpm' (Andrew's patch-bomb)

2012-03-22 09:04:48 -07:00

slab.c

Merge branch 'slab/for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/penberg/linux

2012-03-28 15:04:26 -07:00

slob.c

mm: Map most files to use export.h instead of module.h

2011-10-31 09:20:12 -04:00

slub.c

slub: missing test for partial pages flush work in flush_all()

2012-05-17 18:00:51 -07:00

sparse-vmemmap.c

mm: delete various needless include <linux/module.h>

2011-10-31 09:20:11 -04:00

sparse.c

bootmem/sparsemem: remove limit constraint in alloc_bootmem_section

2012-03-21 17:54:58 -07:00

swap_state.c

mm: fix s390 BUG by __set_page_dirty_no_writeback on swap

2012-04-23 18:19:22 -07:00

swap.c

mm: drain percpu lru add/rotate page-vectors on cpu hot-unplug

2012-03-21 17:54:58 -07:00

swapfile.c

swapon: check validity of swap_flags

2012-03-28 17:14:35 -07:00

thrash.c

mm/thrash.c: quiet sparse noise

2011-10-31 17:30:50 -07:00

truncate.c

mm for fs: add truncate_pagecache_range()

2012-03-28 17:14:35 -07:00

util.c

procfs: mark thread stack correctly in proc/<pid>/maps

2012-03-21 17:54:58 -07:00

vmalloc.c

mm: remove the second argument of k[un]map_atomic()

2012-03-20 21:48:27 +08:00

vmscan.c

mm: fix up the vmscan stat in vmstat

2012-04-25 21:26:33 -07:00

vmstat.c

mm: fix up the vmscan stat in vmstat

2012-04-25 21:26:33 -07:00