rpms
/
kernel
2
0
Fork 0
Code Issues Pull Requests Releases Wiki Activity

Add clockevents oops fix

This commit is contained in:
Josh Boyer 2013-05-08 11:47:36 -04:00
parent 731965305f
commit 673593a404
1 changed files with 129 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

129
tglx.patch Normal file
View File

@ -0,0 +1,129 @@
Delivered-To: jwboyer@gmail.com
Received: by 10.76.92.6 with SMTP id ci6csp75137oab;
Fri, 3 May 2013 11:33:29 -0700 (PDT)
X-Received: by 10.66.146.74 with SMTP id ta10mr15901145pab.60.1367606009492;
Fri, 03 May 2013 11:33:29 -0700 (PDT)
Return-Path: <linux-kernel-owner@vger.kernel.org>
Received: from vger.kernel.org (vger.kernel.org. [209.132.180.67])
by mx.google.com with ESMTP id h1si8624725pad.114.2013.05.03.11.33.22
for <multiple recipients>;
Fri, 03 May 2013 11:33:29 -0700 (PDT)
Received-SPF: pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) client-ip=209.132.180.67;
Authentication-Results: mx.google.com;
spf=pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) smtp.mail=linux-kernel-owner@vger.kernel.org
Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand
id S1763285Ab3ECSdI (ORCPT <rfc822;kernelandme@gmail.com>
+ 99 others); Fri, 3 May 2013 14:33:08 -0400
Received: from www.linutronix.de ([62.245.132.108]:46407 "EHLO
Galois.linutronix.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org
with ESMTP id S1759070Ab3ECSdH (ORCPT
<rfc822;linux-kernel@vger.kernel.org>);
Fri, 3 May 2013 14:33:07 -0400
Received: from localhost ([127.0.0.1])
by Galois.linutronix.de with esmtps (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32)
(Exim 4.72)
(envelope-from <tglx@linutronix.de>)
id 1UYKmx-0005xg-JP; Fri, 03 May 2013 20:32:59 +0200
Date: Fri, 3 May 2013 20:32:58 +0200 (CEST)
From: Thomas Gleixner <tglx@linutronix.de>
To: Dave Jones <davej@redhat.com>
cc: Yinghai Lu <yinghai@kernel.org>,
Linux Kernel <linux-kernel@vger.kernel.org>
Subject: Re: clockevents_program_event WARN_ON preventing boot.
In-Reply-To: <20130503144912.GB1283@redhat.com>
Message-ID: <alpine.LFD.2.02.1305032015060.2990@ionos>
References: <20130430212007.GB18598@redhat.com> <20130430213719.GA14988@redhat.com> <alpine.LFD.2.02.1305021234510.3972@ionos> <20130502154621.GA23990@redhat.com> <alpine.LFD.2.02.1305022152280.2891@ionos> <CAE9FiQXpV451xTzAJyNdC-+-oqF9v8Cy5evcNOHKFffERw2SwA@mail.gmail.com>
<alpine.LFD.2.02.1305022304370.2891@ionos> <CAE9FiQWFK_ropzW_qQLcNxLYyek8-PHGW-8SxfZJSijvdrss1A@mail.gmail.com> <alpine.LFD.2.02.1305022337470.2891@ionos> <20130503144912.GB1283@redhat.com>
User-Agent: Alpine 2.02 (LFD 1266 2009-07-14)
MIME-Version: 1.0
Content-Type: TEXT/PLAIN; charset=US-ASCII
X-Linutronix-Spam-Score: -1.0
X-Linutronix-Spam-Level: -
X-Linutronix-Spam-Status: No , -1.0 points, 5.0 required, ALL_TRUSTED=-1,SHORTCIRCUIT=-0.0001
Sender: linux-kernel-owner@vger.kernel.org
Precedence: bulk
List-ID: <linux-kernel.vger.kernel.org>
X-Mailing-List: linux-kernel@vger.kernel.org
On Fri, 3 May 2013, Dave Jones wrote:
> On Fri, May 03, 2013 at 12:49:20AM +0200, Thomas Gleixner wrote:
>
> > I'm fundamentally confused and Daves observation about slub debug does
> > not make it less confusing.
> >
> > It'd be nice if you could add some more instrumentation or bisect the
> > issue.
>
> Here's what I ended up with..
> b352bc1cbc29134a356b5c16ee2281807a7b984e is the first bad commit
> commit b352bc1cbc29134a356b5c16ee2281807a7b984e
> Author: Thomas Gleixner <tglx@linutronix.de>
> Date: Tue Mar 5 14:25:32 2013 +0100
>
> tick: Convert broadcast cpu bitmaps to cpumask_var_t
>
> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
> Link: http://lkml.kernel.org/r/20130306111537.366394000@linutronix.de
> Cc: Rusty Russell <rusty@rustcorp.com.au>
>
I bet you have CONFIG_CPUMASK_OFFSTACK enabled.
/me is a moron and rumages for a brown paperbag.
Patch below.
Thanks,
tglx
------------>
Subject: tick: Use zalloc_cpumask_var for allocating offstack cpumasks
From: Thomas Gleixner <tglx@linutronix.de>
Date: Fri, 03 May 2013 20:22:36 +0200
commit b352bc1cbc (tick: Convert broadcast cpu bitmaps to
cpumask_var_t) broke CONFIG_CPUMASK_OFFSTACK in a very subtle way.
Instead of allocating the cpumasks with zalloc_cpumask_var it uses
alloc_cpumask_var, so we can get random data there, which of course
confuses the logic completely and causes random failures.
Reported-by: Dave Jones <davej@redhat.com>
Reported-by: Yinghai Lu <yinghai@kernel.org>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
---
kernel/time/tick-broadcast.c | 10 +++++-----
1 file changed, 5 insertions(+), 5 deletions(-)
Index: linux-2.6/kernel/time/tick-broadcast.c
===================================================================
--- linux-2.6.orig/kernel/time/tick-broadcast.c
+++ linux-2.6/kernel/time/tick-broadcast.c
@@ -785,11 +785,11 @@ bool tick_broadcast_oneshot_available(vo
void __init tick_broadcast_init(void)
{
- alloc_cpumask_var(&tick_broadcast_mask, GFP_NOWAIT);
- alloc_cpumask_var(&tmpmask, GFP_NOWAIT);
+ zalloc_cpumask_var(&tick_broadcast_mask, GFP_NOWAIT);
+ zalloc_cpumask_var(&tmpmask, GFP_NOWAIT);
#ifdef CONFIG_TICK_ONESHOT
- alloc_cpumask_var(&tick_broadcast_oneshot_mask, GFP_NOWAIT);
- alloc_cpumask_var(&tick_broadcast_pending_mask, GFP_NOWAIT);
- alloc_cpumask_var(&tick_broadcast_force_mask, GFP_NOWAIT);
+ zalloc_cpumask_var(&tick_broadcast_oneshot_mask, GFP_NOWAIT);
+ zalloc_cpumask_var(&tick_broadcast_pending_mask, GFP_NOWAIT);
+ zalloc_cpumask_var(&tick_broadcast_force_mask, GFP_NOWAIT);
#endif
}
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/