linux-kernel - Re: [PATCH] cgroup: use an ordered workqueue for cgroup destruction

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Message-ID: <alpine.LSU.2.11.1402071300300.926@eggly.anvils>
Date:	Fri, 7 Feb 2014 13:06:00 -0800 (PST)
From:	Hugh Dickins <hughd@...gle.com>
To:	Tejun Heo <tj@...nel.org>
cc:	Hugh Dickins <hughd@...gle.com>,
	Filipe Brandenburger <filbranden@...gle.com>,
	Li Zefan <lizefan@...wei.com>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Michal Hocko <mhocko@...e.cz>,
	Johannes Weiner <hannes@...xchg.org>,
	Greg Thelen <gthelen@...gle.com>,
	Michel Lespinasse <walken@...gle.com>,
	Markus Blank-Burian <burian@...nster.de>,
	Shawn Bohrer <shawn.bohrer@...il.com>, cgroups@...r.kernel.org,
	linux-kernel@...r.kernel.org, linux-mm@...ck.org
Subject: Re: [PATCH] cgroup: use an ordered workqueue for cgroup
 destruction

On Fri, 7 Feb 2014, Tejun Heo wrote:
> On Fri, Feb 07, 2014 at 12:20:44PM -0800, Hugh Dickins wrote:
> 
> > You don't return to this concern in the following mails of the thread:
> > did you later decide that it actually won't be a problem?  I'll assume
> > so for the moment, since you took the patch, but please reassure me.
> 
> I was just worrying about a different solution where we take
> css_offline invocation outside of cgroup_mutex and bumping up
> max_active.  There's nothing to worry about your patch.  Sorry about
> not being clear.  :)

Thanks a lot for your detailed and admirably responsive explanations.
You were looking ahead, I see that now, and I'm gratefully reassured :)

Hugh
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