Hello, Shaohua. On Wed, Oct 04, 2017 at 10:41:19AM -0700, Shaohua Li wrote: > From: Shaohua Li <shli@xxxxxx> > > 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
