Messages in this thread | | | Date | Fri, 26 Jun 2015 09:55:44 -0400 | From | Tejun Heo <> | Subject | Re: [PATCH 2/6] blkcg: add blkg_[rw]stat->aux_cnt and replace cfq_group->dead_stats with it |
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On Fri, Jun 26, 2015 at 09:45:25AM -0400, Vivek Goyal wrote: > I was just curious that why aux_cnt is different from rest of the stats. > (It is atomic64_t while others are not).
Ooh because otherwise we'd have to protect it with sth - a spinlock, u64 stat sync thing or whatever. It's just a lot simpler and more robust to use atomics.
Thanks.
-- tejun
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