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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