linux-kernel - Re: [Bug #37222] 3.0.0-rc1-git3 -- kernel/sched.c:619 invoked rcu_dereference

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Date:	Mon, 13 Jun 2011 10:00:06 +0800
From:	Lin Ming <ming.m.lin@...el.com>
To:	"Rafael J. Wysocki" <rjw@...k.pl>
Cc:	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	Kernel Testers List <kernel-testers@...r.kernel.org>,
	Maciej Rutecki <maciej.rutecki@...il.com>,
	Florian Mickler <florian@...kler.org>,
	Miles Lane <miles.lane@...il.com>
Subject: Re: [Bug #37222] 3.0.0-rc1-git3 -- kernel/sched.c:619 invoked
 rcu_dereference_check() without protection!


> From: Rafael J. Wysocki <rjw@...k.pl>
> Date: Mon, Jun 13, 2011 at 4:30 AM
> Subject: [Bug #37222] 3.0.0-rc1-git3 -- kernel/sched.c:619 invoked
> rcu_dereference_check() without protection!
> To: Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
> Cc: Kernel Testers List <kernel-testers@...r.kernel.org>, Maciej
> Rutecki <maciej.rutecki@...il.com>, Florian Mickler
> <florian@...kler.org>, Miles Lane <miles.lane@...il.com>
> 
> 
> This message has been generated automatically as a part of a summary report
> of recent regressions.
> 
> The following bug entry is on the current list of known regressions
> from 2.6.39.  Please verify if it still should be listed and let the
> tracking team
> know (either way).
> 
> 
> Bug-Entry       : http://bugzilla.kernel.org/show_bug.cgi?id=37222
> Subject         : 3.0.0-rc1-git3 -- kernel/sched.c:619 invoked
> rcu_dereference_check() without protection!
> Submitter       : Miles Lane <miles.lane@...il.com>
> Date            : 2011-06-04 3:22 (9 days old)
> Message-ID      : <BANLkTikHS7TuFhm3cfJ+Y=erWDaAwuE_TA@...l.gmail.com>
> References      : http://marc.info/?l=linux-kernel&m=130715775803343&w=2
> 

This was fixed already.
http://git.kernel.org/?p=linux/kernel/git/x86/linux-2.6-tip.git;a=commit;h=6c6c54e180

commit 6c6c54e1807faf116724451ef2bd14993780470a
Author: Peter Zijlstra <peterz@...radead.org>
Date:   Fri Jun 3 17:37:07 2011 +0200

    sched: Fix/clarify set_task_cpu() locking rules


Thanks,
Lin Ming

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