linux-kernel - Re: [ckrm-tech] Regression in 2.6.23-rc2-mm2, mounting cpusets causes a hang

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Message-Id: <20070815193641.c1a20434.pj@sgi.com>
Date:	Wed, 15 Aug 2007 19:36:41 -0700
From:	Paul Jackson <pj@....com>
To:	Lee Schermerhorn <Lee.Schermerhorn@...com>
Cc:	clameter@....com, ckrm-tech@...ts.sourceforge.net,
	balbir@...ibm.com, vatsa@...ux.vnet.ibm.com, bob.picco@...com,
	linux-kernel@...r.kernel.org, mel@...net.ie, nacc@...ibm.com,
	akpm@...ux-foundation.org, kamezawa.hiroyu@...fujitsu.com,
	serge@...lyn.com
Subject: Re: [ckrm-tech] Regression in 2.6.23-rc2-mm2, mounting cpusets
 causes a hang

Christoph wrote (and Lee quoted):
> Looks like we need to fix cpuset nodemasks for the !NUMA case then?
> It cannot expect to find valid nodemasks if !NUMA.

The code in kernel/cpuset.c should be written as if there are always
valid nodemasks.  In the case of !NUMA, it will happen that there is
only one node, but kernel/cpuset.c should not manifest that detail.

-- 
                  I won't rest till it's the best ...
                  Programmer, Linux Scalability
                  Paul Jackson <pj@....com> 1.925.600.0401
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