Date: Sun, 15 Jun 2008 16:38:24 -0700 (PDT)
From: Linus Torvalds <torvalds@linux-foundation.org>
To: "Paul E. McKenney" <paulmck@linux.vnet.ibm.com>
cc: Alexey Dobriyan <adobriyan@gmail.com>, Oleg Nesterov <oleg@tv-sign.ru>,
       Adrian Bunk <bunk@kernel.org>, "Rafael J. Wysocki" <rjw@sisk.pl>,
       Linux Kernel Mailing List <linux-kernel@vger.kernel.org>
Subject: Re: [Bug #10815] 2.6.26-rc4: RIP find_pid_ns+0x6b/0xa0
In-Reply-To: <20080615232754.GD17915@linux.vnet.ibm.com>
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References: <dCRO4tbfLzK.A.BVD.E3vSIB@albercik> <20080613135255.GB21341@cs181133002.pp.htv.fi> <20080614144200.GA26421@linux.vnet.ibm.com> <20080614145839.GA10523@tv-sign.ru> <20080614181212.GB26421@linux.vnet.ibm.com> <20080614194338.GA4820@martell.zuzino.mipt.ru>
 <20080615033001.GE26421@linux.vnet.ibm.com> <20080615162150.GA8289@martell.zuzino.mipt.ru> <20080615181710.GA17915@linux.vnet.ibm.com> <alpine.LFD.1.10.0806151323101.2949@woody.linux-foundation.org> <20080615232754.GD17915@linux.vnet.ibm.com>
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On Sun, 15 Jun 2008, Paul E. McKenney wrote:
>
> If that is the right thing to do.  I would feel better about it if I
> could reproduce the failure.

Is there some configuration thing that might make it happen for Alexey but 
not for you? The only obvious one is the normal PREEMPT thing, but 
PREEMPT_RCU obviously depends on that, so there must be something else.

CONFIG_SMP? CONFIG_NO_HZ? CONFIG_[RT|FAIR]_GROUP_SCHED? There's a number 
of config options that change scheduling details..

		Linus
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