On Wed, Oct 04, 2017 at 10:51:49AM -0700, Tejun Heo wrote: > Hello, Shaohua. > > On Wed, Oct 04, 2017 at 10:41:19AM -0700, Shaohua Li wrote: > > From: Shaohua Li <s...@fb.com> > > > > 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
Nice. Seems only used for legacy queue though. Thanks, Shaohua
