linux-kernel - Re: [PATCH 5/6] cgroup: implement cgroup v2 thread support

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Message-ID: <20170719163453.GQ3365493@devbig577.frc2.facebook.com>
Date:   Wed, 19 Jul 2017 12:34:53 -0400
From:   Tejun Heo <tj@...nel.org>
To:     Peter Zijlstra <peterz@...radead.org>
Cc:     lizefan@...wei.com, hannes@...xchg.org, mingo@...hat.com,
        longman@...hat.com, cgroups@...r.kernel.org,
        linux-kernel@...r.kernel.org, kernel-team@...com, pjt@...gle.com,
        luto@...capital.net, efault@....de, torvalds@...ux-foundation.org,
        guro@...com
Subject: Re: [PATCH 5/6] cgroup: implement cgroup v2 thread support

Hello, Peter.

On Wed, Jul 19, 2017 at 04:07:28PM +0200, Peter Zijlstra wrote:
> On Tue, Jul 18, 2017 at 02:47:14PM -0400, Tejun Heo wrote:
> > Were there other things that caught your eyes?
> 
> I didn't immediately see the point of "domain (threaded" output, and I

I'll probably drop the parens but I think it's meaningful to show the
state to userland as it affects what users can and can't do.

> think it might be useful to have a "threaded" column in /proc/cgroups.

Will add that.  We *might* want cgroup.controllers_threaded too but we
can think about that later.

> But no, I've been over this a few times now and I think we're good.
> 
> Yes, I think we can work with this. Thanks!

Awesome.  I'll update the patchset.

Thanks a lot for the inputs and patience!

-- 
tejun