Re: [PATCH 17/24] blkcg: implement blkcg_policy->on/offline_pd_fn() and blkcg_gq->online
From: Vivek Goyal <hidden>
Date: 2013-01-02 19:38:37
Also in:
lkml
On Fri, Dec 28, 2012 at 12:35:39PM -0800, Tejun Heo wrote: [..]
quoted hunk ↗ jump to hunk
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