linux-kernel - Re: [PATCH] Fix race between attach_task and cpuset

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Message-Id: <20070327014524.e4177467.pj@sgi.com>
Date:	Tue, 27 Mar 2007 01:45:24 -0700
From:	Paul Jackson <pj@....com>
To:	Srivatsa Vaddagiri <vatsa@...ibm.com>
Cc:	balbir@...ibm.com, akpm@...ux-foundation.org,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH] Fix race between attach_task and cpuset_exit

> Yes, but the cpuset is not made invisible to userspace (in filesystem)  
> yet. So as cpuset_exit() discovers that cpuset B has zero refcount now  
> and blocks on mutex_lock(&manage_mutex) [ to do a check_for_release  
> later ], someone could have done a attach_task to that cpuset.

Agreed.

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