Messages in this thread | | | Date | Wed, 20 Nov 2013 12:24:13 -0500 | From | Tejun Heo <> | Subject | Re: [PATCH] blkcg: have bh disable for 32bit UP system reading 64bit stats |
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On Wed, Nov 06, 2013 at 07:14:44PM +0800, Hong Zhiguo wrote: > From: Hong Zhiguo <zhiguohong@tencent.com> > > 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>
Jens, can you please pick this one up? This probably needs to be tagged for stable too.
Thanks!
-- tejun
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