| Date | Wed, 2 Jan 2013 14:38:28 -0500 | From | Vivek Goyal <> | Subject | Re: [PATCH 17/24] blkcg: implement blkcg_policy->on/offline_pd_fn() and blkcg_gq->online |
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On Fri, Dec 28, 2012 at 12:35:39PM -0800, Tejun Heo wrote:
[..] > diff --git a/block/blk-cgroup.h b/block/blk-cgroup.h > index 40f5b97..678e89e 100644 > --- a/block/blk-cgroup.h > +++ b/block/blk-cgroup.h > @@ -106,12 +106,17 @@ struct blkcg_gq { > /* reference count */ > int refcnt; > > + /* is this blkg online? protected by both blkcg and q locks */ > + bool online; > +
Hi Tejun,
What does above mean? One needs to take one lock or both the locks to check/modify blkg->online.
Thanks Vivek
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