linux-kernel - Re: [PATCH v4 2/2] cpusets,isolcpus: add file to show isolated cpus in cpuset

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Message-ID: <20150302170116.GJ17694@htj.duckdns.org>
Date:	Mon, 2 Mar 2015 12:01:16 -0500
From:	Tejun Heo <tj@...nel.org>
To:	Rik van Riel <riel@...hat.com>
Cc:	Zefan Li <lizefan@...wei.com>, linux-kernel@...r.kernel.org,
	Peter Zijlstra <peterz@...radead.org>,
	Clark Williams <williams@...hat.com>,
	Ingo Molnar <mingo@...hat.com>,
	Luiz Capitulino <lcapitulino@...hat.com>,
	David Rientjes <rientjes@...gle.com>,
	Mike Galbraith <umgwanakikbuti@...il.com>,
	cgroups@...r.kernel.org
Subject: Re: [PATCH v4 2/2] cpusets,isolcpus: add file to show isolated cpus
 in cpuset

On Thu, Feb 26, 2015 at 12:12:31PM -0500, Rik van Riel wrote:
> On Thu, 26 Feb 2015 19:05:57 +0800
> Zefan Li <lizefan@...wei.com> wrote:
> 
> > Make it return -ENOMEM ? Or make it a global variable and allocate memory for it
> > in cpuset_init().
> 
> Here you are. This addresses your concern, as well as the
> issue David Rientjes found earlier.
> 
> ---8<---
> 
> Subject: cpusets,isolcpus: add file to show isolated cpus in cpuset
> 
> The previous patch makes it so the code skips over isolcpus when
> building scheduler load balancing domains. This makes it hard to
> see for a user which of the CPUs in a cpuset are participating in
> load balancing, and which ones are isolated cpus.
> 
> Add a cpuset.isolcpus file with info on which cpus in a cpuset are
> isolated CPUs.
> 
> This file is read-only for now. In the future we could extend things
> so isolcpus can be changed at run time, for the root (system wide)
> cpuset only.
> 
> Acked-by: David Rientjes <rientjes@...gle.com>
> Cc: Peter Zijlstra <peterz@...radead.org>
> Cc: Clark Williams <williams@...hat.com>
> Cc: Li Zefan <lizefan@...wei.com>
> Cc: Ingo Molnar <mingo@...hat.com>
> Cc: Luiz Capitulino <lcapitulino@...hat.com>
> Cc: David Rientjes <rientjes@...gle.com>
> Cc: Mike Galbraith <umgwanakikbuti@...il.com>
> Cc: cgroups@...r.kernel.org
> Signed-off-by: Rik van Riel <riel@...hat.com>

Applied 1-2 to cgroup/for-4.1.

Thanks.

-- 
tejun
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