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From: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>
To: David Howells <dhowells@redhat.com>
Subject: Re: [CRED bug?] 2.6.29-rc3 don't survive on stress workload
Cc: kosaki.motohiro@jp.fujitsu.com, "Serge E. Hallyn" <serue@us.ibm.com>,
       LKML <linux-kernel@vger.kernel.org>,
       Lee Schermerhorn <Lee.Schermerhorn@hp.com>
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Date: Fri, 13 Feb 2009 13:44:46 +0900 (JST)
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Hi

> > 	1. put_user_ns() was being called before the uid (which
> > 	   was in the init_user_ns) was unhashed
> 
> Ah yes...  but only if CONFIG_USER_NS=y.  Otherwise the unhash was being done
> before the release anyway.  With this option set, the unhash was being deferred
> to a workqueue thread.
> 
> Okay, that seems reasonable.

Serge's patch servive on my stress workload for >24 hour.
then, I think his patch have fixed this issue.

thanks.