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List:       linux-rt-users
Subject:    Re: [PATCH v2] rt-numa: ignore runtime cpumask if -a CPULIST is specified
From:       John Kacur <jkacur () redhat ! com>
Date:       2022-01-28 21:08:45
Message-ID: 97ed969-a641-ae8d-3731-34fab5fab456 () redhat ! com
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On Fri, 28 Jan 2022, Sebastian Andrzej Siewior wrote:

> On 2022-01-28 12:44:14 [-0500], John Kacur wrote:
> > I agree that our current method is too restrictive, so I like the basic 
> > idea here.
> > 
> > I think we also need to differentiate between -a with no arguments
> > and -a all. -a with no arguments should inherit the cpumask from the 
> > runtime environment but -a all, should be the same as specifying all the 
> > cpus and ignoring the inherited cpumask.
> 
> do you consider number of online CPUs to not deploy more threads than
> CPUs online in case some were shutdown?

Not sure I understand your question, but what I am saying is that we can 
inherit a cpumask that has less cpus than cpus that are online. So in the 
case of -a, just use the cpus available in the inherited cpumask
in the case of -a all, use all available cpus.

> 
> > Thanks
> > 
> > John
> 
> Sebastian
> 
> 

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