linux-kernel - Re: [PATCH] cpusets: Allocate heap only when required

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Message-ID: <20140124105952.GD4101@htj.dyndns.org>
Date:	Fri, 24 Jan 2014 05:59:52 -0500
From:	Tejun Heo <tj@...nel.org>
To:	David Rientjes <rientjes@...gle.com>
Cc:	Li Zefan <lizefan@...wei.com>,
	Viresh Kumar <viresh.kumar@...aro.org>, mingo@...nel.org,
	peterz@...radead.org, linaro-kernel@...ts.linaro.org,
	patches@...aro.org, linux-kernel@...r.kernel.org,
	Cgroups <cgroups@...r.kernel.org>
Subject: Re: [PATCH] cpusets: Allocate heap only when required

Hey,

On Fri, Jan 24, 2014 at 02:51:12AM -0800, David Rientjes wrote:
> Nobody is depending on shit, the patch is removing a completely pointless 
> memory allocation in braindead cpuset code.  What you think is "harmful" 
> or "more harmful" is irrelevant, but nobody said anything about depending 
> on that behavior to do anything.

Weren't you talking something of that effect in memcg?  Or was it
Michal?  At any rate, I think you're missing the point why Li replied
that it's harmless.  He, I think, meant that it doesn't make any
semantical difference to userland, so your reply saying that it's not
harmless listing the failure mode under memory pressure seemed
misleading, so I thought clarification was necessary.  Probably my
(false?) memory of you talking about that contributed.  Anyways, we
agree.  Don't depend on it.

Thanks.

-- 
tejun
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