On Mon 26-12-16 06:25:56, kernel test robot wrote:

FYI, we noticed the following commit:

commit: d18e2b2aca0396849f588241e134787a829c707d ("mm, memcg: fix (Re: OOM: Better, but still there on)")
url: https://github.com/0day-ci/linux/commits/Michal-Hocko/mm-memcg-fix-Re-OOM-Better-but-still-there-on/20161223-225057
base: git://git.cmpxchg.org/linux-mmotm.git master

in testcase: boot

on test machine: qemu-system-i386 -enable-kvm -m 360M

caused below changes:


+--------------------------------------------------------+------------+------------+
|                                                        | c7d85b880b | d18e2b2aca |
+--------------------------------------------------------+------------+------------+
| boot_successes                                         | 8          | 0          |
| boot_failures                                          | 0          | 2          |
| WARNING:at_mm/memcontrol.c:#mem_cgroup_update_lru_size | 0          | 2          |
| kernel_BUG_at_mm/memcontrol.c                          | 0          | 2          |
| invalid_opcode:#[##]DEBUG_PAGEALLOC                    | 0          | 2          |
| Kernel_panic-not_syncing:Fatal_exception               | 0          | 2          |
+--------------------------------------------------------+------------+------------+



[   95.226364] init: tty6 main process (990) killed by TERM signal
[   95.314020] init: plymouth-upstart-bridge main process (1039) terminated with status 1
[   97.588568] ------------[ cut here ]------------
[   97.594364] WARNING: CPU: 0 PID: 1055 at mm/memcontrol.c:1032 mem_cgroup_update_lru_size+0xdd/0x12b
[   97.606654] mem_cgroup_update_lru_size(40297f00, 0, -1): lru_size 1 but empty
[   97.615140] Modules linked in:
[   97.618834] CPU: 0 PID: 1055 Comm: killall5 Not tainted 4.9.0-mm1-00095-gd18e2b2 #82
[   97.628008] Call Trace:
[   97.631025]  dump_stack+0x16/0x18
[   97.635107]  __warn+0xaf/0xc6
[   97.638729]  ? mem_cgroup_update_lru_size+0xdd/0x12b

Do you have the full backtrace?
-- 
Michal Hocko
SUSE Labs

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