Hello, Christoph. On Tue, May 23, 2017 at 12:40:19AM -0700, Christoph Hellwig wrote: > On Mon, May 22, 2017 at 03:53:09PM -0700, Shaohua Li wrote: > > Now we have the facilities to implement exportfs operations. > > But do we have a use case? I'd rather avoid this..
Yeah, this is one of the repeatedly requested features - a cgroup id which can be looked up in a scalable way. We probably should have added this earlier too as we already have places where we're passing in full cgroup path into the kernel (ipt_cgroup match). IIUC, Shaohua is adding it so that block tracing can be made aware of cgroups but something like this is necessary whenever we try to refer to a cgroup in a race-free / scalable way. If you have any other ideas, I'm all ears. Thanks. -- tejun
