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From: Zefan Li <lizefan-hv44wF8Li93QT0dZR+AlfA@public.gmane.org>
To: Rik van Riel <riel-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
Cc: linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
	Peter Zijlstra <peterz-wEGCiKHe2LqWVfeAwA7xHQ@public.gmane.org>,
	Clark Williams <williams-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>,
	Ingo Molnar <mingo-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>,
	Luiz Capitulino
	<lcapitulino-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>,
	David Rientjes <rientjes-hpIqsD4AKlfQT0dZR+AlfA@public.gmane.org>,
	Mike Galbraith
	<umgwanakikbuti-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>,
	cgroups-u79uwXL29TY76Z2rM5mHXA@public.gmane.org
Subject: Re: [PATCH v4 2/2] cpusets,isolcpus: add file to show isolated cpus in cpuset
Date: Mon, 2 Mar 2015 14:15:39 +0800	[thread overview]
Message-ID: <54F4000B.5000901@huawei.com> (raw)
In-Reply-To: <20150226121231.6fcba7e8-XDFsmL65zczMw9PXcw3sFBL4W9x8LtSr@public.gmane.org>

Hi Rik,

> 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.
> 

One Question, why not add a /sys/devices/system/cpu/isolated instead?

WARNING: multiple messages have this Message-ID (diff)
From: Zefan Li <lizefan@huawei.com>
To: Rik van Riel <riel@redhat.com>
Cc: <linux-kernel@vger.kernel.org>,
	Peter Zijlstra <peterz@infradead.org>,
	Clark Williams <williams@redhat.com>,
	Ingo Molnar <mingo@redhat.com>,
	"Luiz Capitulino" <lcapitulino@redhat.com>,
	David Rientjes <rientjes@google.com>,
	Mike Galbraith <umgwanakikbuti@gmail.com>,
	<cgroups@vger.kernel.org>
Subject: Re: [PATCH v4 2/2] cpusets,isolcpus: add file to show isolated cpus in cpuset
Date: Mon, 2 Mar 2015 14:15:39 +0800	[thread overview]
Message-ID: <54F4000B.5000901@huawei.com> (raw)
In-Reply-To: <20150226121231.6fcba7e8@annuminas.surriel.com>

Hi Rik,

> 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.
> 

One Question, why not add a /sys/devices/system/cpu/isolated instead?


  parent reply	other threads:[~2015-03-02  6:15 UTC|newest]

Thread overview: 46+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2015-02-25 16:38 [PATCH -v2 0/2] cpusets,isolcpus: resolve conflict between cpusets and isolcpus riel
2015-02-25 16:38 ` [PATCH 1/2] cpusets,isolcpus: exclude isolcpus from load balancing in cpusets riel
     [not found]   ` <1424882288-2910-2-git-send-email-riel-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
2015-02-27  9:32     ` Peter Zijlstra
2015-02-27  9:32       ` Peter Zijlstra
     [not found]       ` <20150227093231.GG21418-ndre7Fmf5hadTX5a5knrm8zTDFooKrT+cvkQGrU6aU0@public.gmane.org>
2015-02-27 17:08         ` [PATCH 3/2] cpusets,isolcpus: document relationship between cpusets & isolcpus Rik van Riel
2015-02-27 17:08           ` Rik van Riel
2015-02-27 21:15           ` David Rientjes
     [not found]           ` <20150227120803.07db15fe-XDFsmL65zczMw9PXcw3sFBL4W9x8LtSr@public.gmane.org>
2015-02-28  3:23             ` Zefan Li
2015-02-28  3:23               ` Zefan Li
2015-02-28  3:21   ` [PATCH 1/2] cpusets,isolcpus: exclude isolcpus from load balancing in cpusets Zefan Li
2015-02-28  3:21     ` Zefan Li
2015-02-25 16:38 ` [PATCH 2/2] cpusets,isolcpus: add file to show isolated cpus in cpuset riel
     [not found]   ` <1424882288-2910-3-git-send-email-riel-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
2015-02-25 21:09     ` David Rientjes
2015-02-25 21:09       ` David Rientjes
2015-02-25 21:21       ` Rik van Riel
2015-02-25 21:32     ` [PATCH v3 " Rik van Riel
2015-02-25 21:32       ` Rik van Riel
2015-02-26 11:05     ` [PATCH " Zefan Li
2015-02-26 11:05       ` Zefan Li
2015-02-26 15:24       ` Rik van Riel
2015-02-26 17:12       ` [PATCH v4 " Rik van Riel
2015-02-26 17:12         ` Rik van Riel
     [not found]         ` <20150226121231.6fcba7e8-XDFsmL65zczMw9PXcw3sFBL4W9x8LtSr@public.gmane.org>
2015-02-28  3:22           ` Zefan Li
2015-02-28  3:22             ` Zefan Li
2015-03-02  6:15           ` Zefan Li [this message]
2015-03-02  6:15             ` Zefan Li
2015-03-02  9:12             ` Peter Zijlstra
2015-03-03  9:51               ` Zefan Li
2015-03-03  9:51                 ` Zefan Li
2015-03-02  9:09           ` Peter Zijlstra
2015-03-02  9:09             ` Peter Zijlstra
2015-03-02 12:44             ` Mike Galbraith
     [not found]               ` <1425300290.5863.17.camel-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
2015-03-02 14:35                 ` Rik van Riel
2015-03-02 14:35                   ` Rik van Riel
     [not found]                   ` <54F47534.7070204-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
2015-03-02 14:54                     ` Mike Galbraith
2015-03-02 14:54                       ` Mike Galbraith
2015-03-02 15:29                 ` Tejun Heo
2015-03-02 15:29                   ` Tejun Heo
2015-03-02 16:02                   ` Mike Galbraith
     [not found]                     ` <1425312177.12094.15.camel-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
2015-03-02 16:09                       ` Tejun Heo
2015-03-02 16:09                         ` Tejun Heo
     [not found]                         ` <20150302160903.GE17694-piEFEHQLUPpN0TnZuCh8vA@public.gmane.org>
2015-03-02 17:35                           ` Mike Galbraith
2015-03-02 17:35                             ` Mike Galbraith
2015-03-02 17:01         ` Tejun Heo
     [not found]           ` <20150302170116.GJ17694-piEFEHQLUPpN0TnZuCh8vA@public.gmane.org>
2015-03-02 17:31             ` Tejun Heo
2015-03-02 17:31               ` Tejun Heo

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