linux-kernel - Re: [PATCH 1/8] cgroup: kill cgroup_subsys->__DEPRECATED_clear_css

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Date:	Wed, 31 Oct 2012 22:23:42 +0100
From:	Michal Hocko <mhocko@...e.cz>
To:	Tejun Heo <tj@...nel.org>
Cc:	lizefan@...wei.com, hannes@...xchg.org, bsingharora@...il.com,
	kamezawa.hiroyu@...fujitsu.com,
	containers@...ts.linux-foundation.org, cgroups@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH 1/8] cgroup: kill
 cgroup_subsys->__DEPRECATED_clear_css_refs

On Wed 31-10-12 13:14:07, Tejun Heo wrote:
> Hey, Michal.
> 
> On Wed, Oct 31, 2012 at 1:12 PM, Michal Hocko <mhocko@...e.cz> wrote:
> > And sorry for being to annoying about this WARN_ON_ONCE but I really
> > don't see any reason for it. pre_destroy can still happen and now it is
> > even reduced to a reasonable condition (somebody shown up). So I would
> > put it out of way as it doesn't give us anything and as I've already
> > mentioned one can trigger it really easily.
> 
> It was there before and goes away in several commits.  I have to
> explain all that to remove it in this patch.  Why do that when the
> whole thing is just gonna disappear anyway?

I would consider it nicer but if you feel it is not worth it then don't
worry. It is not a big deal. The important part is that we do not ignore
the return value now.

Thanks
-- 
Michal Hocko
SUSE Labs
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