linux-kernel - Re: [tip:x86/irq] x86: Always use irq stacks

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Date:	Wed, 30 Jun 2010 09:44:34 +0200
From:	Ingo Molnar <mingo@...e.hu>
To:	mingo@...hat.com, hpa@...or.com, linux-kernel@...r.kernel.org,
	hch@....de, tglx@...utronix.de
Cc:	linux-tip-commits@...r.kernel.org
Subject: Re: [tip:x86/irq] x86: Always use irq stacks


* tip-bot for Christoph Hellwig <hch@....de> wrote:

> Commit-ID:  7974891db234467eaf1fec613ec0129cb4ac2332
> Gitweb:     http://git.kernel.org/tip/7974891db234467eaf1fec613ec0129cb4ac2332
> Author:     Christoph Hellwig <hch@....de>
> AuthorDate: Mon, 28 Jun 2010 14:15:54 +0200
> Committer:  Thomas Gleixner <tglx@...utronix.de>
> CommitDate: Tue, 29 Jun 2010 12:12:59 +0200
> 
> x86: Always use irq stacks

This commit is causing the following bootup crash in -tip testing:

async_continuing @ 1 after 0 usec
EXT3-fs (sda1): recovery required on readonly filesystem
EXT3-fs (sda1): write access will be enabled during recovery
EXT3-fs: barriers not enabled
BUG: unable to handle kernel NULL pointer dereference at 0000039c
IP: [<c102d4a6>] print_context_stack+0x86/0x130
*pde = 00000000 
Oops: 0000 [#1] 
last sysfs file: 

Pid: 0, comm: swapper Not tainted 2.6.35-rc3-tip-01298-g53cd4ef-dirty #13969 A8N-E/System Product Name
EIP: 0060:[<c102d4a6>] EFLAGS: 00010002 CPU: 0
EIP is at print_context_stack+0x86/0x130
EAX: 00000000 EBX: c229cd80 ECX: 00000001 EDX: c229c000
ESI: 00000000 EDI: c1e74d9c EBP: c229cd4c ESP: c229cd28
 DS: 007b ES: 007b FS: 0000 GS: 0000 SS: 0068
Process swapper (pid: 0, ti=c229c000 task=c22a1180 task.ti=c2296000)
Stack:
 c10349df c229dffc c229cd94 ffffe000 c229c000 c229cd94 c229cd68 c1e74d9c
<0> c229c000 c229cd7c c102c0ff c1e74d9c f72aa150 00000000 c229cd6c c229cd6c
<0> c2cd6fa0 00000000 f72aa150 f72aa120 f72aa174 c229cd94 c10349df c229cd7c
Call Trace:
 [<c10349df>] ? save_stack_trace+0x2f/0x50
BUG: unable to handle kernel NULL pointer dereference at 0000039c
IP: [<c102d4a6>] print_context_stack+0x86/0x130
*pde = 00000000 
Oops: 0000 [#2] 

Reverting 7974891db2 and dcfa72628 makes the crash go away.

Full crashlog and config attached.

	Ingo

View attachment "crash.log" of type "text/plain" (225147 bytes)

View attachment "config-Wed_Jun_30_11_10_16_CEST_2010.bad" of type "text/plain" (70341 bytes)