linux-kernel - Re: [PATCH v3 5/5] cpusets, suspend: Save and restore cpusets during suspend/resume

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Message-ID: <alpine.DEB.2.00.1205151414210.1656@chino.kir.corp.google.com>
Date:	Tue, 15 May 2012 14:24:15 -0700 (PDT)
From:	David Rientjes <rientjes@...gle.com>
To:	Peter Zijlstra <a.p.zijlstra@...llo.nl>
cc:	Nishanth Aravamudan <nacc@...ux.vnet.ibm.com>,
	"Srivatsa S. Bhat" <srivatsa.bhat@...ux.vnet.ibm.com>,
	mingo@...nel.org, pjt@...gle.com, paul@...lmenage.org,
	akpm@...ux-foundation.org, rjw@...k.pl, nacc@...ibm.com,
	paulmck@...ux.vnet.ibm.com, tglx@...utronix.de,
	seto.hidetoshi@...fujitsu.com, tj@...nel.org, mschmidt@...hat.com,
	berrange@...hat.com, nikunj@...ux.vnet.ibm.com,
	vatsa@...ux.vnet.ibm.com, liuj97@...il.com,
	linux-kernel@...r.kernel.org, linux-pm@...r.kernel.org
Subject: Re: [PATCH v3 5/5] cpusets, suspend: Save and restore cpusets during
 suspend/resume

On Tue, 15 May 2012, Peter Zijlstra wrote:

> > Why can't we leave cpuset.cpus unaltered for all cpusets during suspend?  
> 
> We can, that's what Srivatsa is going to make. The only thing I object
> to is the !suspend hotplug case.
> 

Srivatsa is going to do that in another patchset in addition to this one?  
We shouldn't need to store any old cpumask at all, just allow cpuset.cpus 
to be a superset of online cpus during s/r and don't touch cpusets at all 
since the cpus, as you said, are guaranteed to come back.
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