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

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Message-ID: <Pine.LNX.4.64.0708141427150.31693@schroedinger.engr.sgi.com>
Date:	Tue, 14 Aug 2007 14:28:34 -0700 (PDT)
From:	Christoph Lameter <clameter@....com>
To:	"Serge E. Hallyn" <serge@...lyn.com>
cc:	Lee Schermerhorn <Lee.Schermerhorn@...com>,
	Dhaval Giani <dhaval@...ux.vnet.ibm.com>, bob.picco@...com,
	nacc@...ibm.com, kamezawa.hiroyu@...fujitsu.com, mel@...net.ie,
	akpm@...ux-foundation.org, Balbir Singh <balbir@...ibm.com>,
	Srivatsa Vaddagiri <vatsa@...ux.vnet.ibm.com>,
	lkml <linux-kernel@...r.kernel.org>,
	ckrm-tech <ckrm-tech@...ts.sourceforge.net>
Subject: Re: Regression in 2.6.23-rc2-mm2, mounting cpusets causes a hang

On Tue, 14 Aug 2007, Serge E. Hallyn wrote:

> CONFIG_NODES_SHIFT was unset, so MAX_NUMNODES=1, so
> node_state() and node_set_state() are dummies.

Ok then you did not have a NUMA system configured. So its okay for the 
dummies to ignore the stuff. CONFIG_NODES_SHIFT is a constant and does not 
change. The first bit is always set.

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