Re: [PATCH 17/24] blkcg: implement blkcg_policy->on/offline_pd_fn()and blkcg_gq->online

[Vivek Goyal]

On Fri, Dec 28, 2012 at 12:35:39PM -0800, Tejun Heo wrote:
> Add two blkcg_policy methods, ->online_pd_fn() and ->offline_pd_fn(),
> which are invoked as the policy_data gets activated and deactivated
> while holding both blkcg and q locks.
> 
> Also, add blkcg_gq->online bool, which is set and cleared as the
> blkcg_gq gets activated and deactivated.  This flag also is toggled
> while holding both blkcg and q locks.
> 
> These will be used to implement hierarchical stats.
> 
> Signed-off-by: Tejun Heo <tj@xxxxxxxxxx>
> ---

Acked-by: Vivek Goyal <vgoyal@xxxxxxxxxx>

Vivek
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