Hello, Shaohua.
On Wed, Oct 04, 2017 at 10:41:19AM -0700, Shaohua Li wrote:
> From: Shaohua Li <[email protected]>
>
> Currently we record block css info in bio but not in request. Normally
> we can get a request's css from its bio, but in some situations, we
> can't access request's bio, for example, after blk_update_request. Add
> the css to request, so we can access css through the life cycle of a
> request.
Each request comes from cgroup specific request_list, so given a
request, its blkcg membership can is accessible through
request->rl->blkg->blkcg
Thanks.
--
tejun
