| commit | 2c575026fae6e63771bd2a4c1d407214a8096a89 | [log] [tgz] |
|---|---|---|
| author | Hong Zhiguo <zhiguohong@tencent.com> | Wed Nov 20 10:35:05 2013 -0700 |
| committer | Jens Axboe <axboe@kernel.dk> | Wed Nov 20 15:33:04 2013 -0700 |
| tree | 4ab6ccbdf75b96229f176fc54e01580954e7a633 | |
| parent | 82023bb7f75b0052f40d3e74169d191c3e4e6286 [diff] |
Update of blkg_stat and blkg_rwstat may happen in bh context. While u64_stats_fetch_retry is only preempt_disable on 32bit UP system. This is not enough to avoid preemption by bh and may read strange 64 bit value. Signed-off-by: Hong Zhiguo <zhiguohong@tencent.com> Acked-by: Tejun Heo <tj@kernel.org> Cc: stable@kernel.org Signed-off-by: Jens Axboe <axboe@kernel.dk>