Re: [PATCH v4 2/2] cpusets,isolcpus: add file to show isolated cpus in cpuset
From: Tejun Heo
Date: Mon Mar 02 2015 - 12:08:14 EST
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@xxxxxxxxxx> 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.
> 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@xxxxxxxxxx>
> Cc: Peter Zijlstra <peterz@xxxxxxxxxxxxx>
> Cc: Clark Williams <williams@xxxxxxxxxx>
> Cc: Li Zefan <lizefan@xxxxxxxxxx>
> Cc: Ingo Molnar <mingo@xxxxxxxxxx>
> Cc: Luiz Capitulino <lcapitulino@xxxxxxxxxx>
> Cc: David Rientjes <rientjes@xxxxxxxxxx>
> Cc: Mike Galbraith <umgwanakikbuti@xxxxxxxxx>
> Cc: cgroups@xxxxxxxxxxxxxxx
> Signed-off-by: Rik van Riel <riel@xxxxxxxxxx>
Applied 1-2 to cgroup/for-4.1.
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