linux-kernel - RE: [PATCH 1/2] xen/mce: Add mcelog support for Xen platform

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Message-ID: <DE8DF0795D48FD4CA783C40EC829233521AF4B@SHSMSX101.ccr.corp.intel.com>
Date:	Thu, 7 Jun 2012 06:45:39 +0000
From:	"Liu, Jinsong" <jinsong.liu@...el.com>
To:	Konrad Rzeszutek Wilk <konrad.wilk@...cle.com>
CC:	Borislav Petkov <bp@...64.org>, "Luck, Tony" <tony.luck@...el.com>,
	"'xen-devel@...ts.xensource.com'" <xen-devel@...ts.xensource.com>,
	"'linux-kernel@...r.kernel.org'" <linux-kernel@...r.kernel.org>
Subject: RE: [PATCH 1/2] xen/mce: Add mcelog support for Xen platform

Konrad Rzeszutek Wilk wrote:
> On Thu, May 31, 2012 at 12:57:44PM +0000, Liu, Jinsong wrote:
>>> From 1a7951d6ca01d7f2c9dd2bdb6de5f8e7fdcb8bbd Mon Sep 17 00:00:00
>>> 2001 
>> From: root <root@...romley.bj.intel.com>
>> Date: Fri, 1 Jun 2012 03:12:51 +0800
>> Subject: [PATCH 1/2] xen/mce: Add mcelog support for Xen platform
>> 
>> When MCA error occurs, it would be handled by Xen hypervisor first,
>> and then the error information would be sent to initial domain for
>> logging. 
>> 
>> This patch gets error information from Xen hypervisor and convert
>> Xen format error into Linux format mcelog. This logic is basically
>> self-contained, not touching other kernel components.
>> 
>> By using tools like mcelog tool users could read specific error
>> information, like what they did under native Linux.
>> 
>> To test follow directions outlined in
>> Documentation/acpi/apei/einj.txt 
> 
> [   53.264610] switch: port 1(eth0) entered forwarding state
> [ 1058.051938] BUG: sleeping function called from invalid context at
> /home/konrad/linux/include/linux/kernel.h:199 [ 1058.052066]
> in_atomic(): 1, irqs_disabled(): 0, pid: 4552, name: mcelog [
> 1058.052130] Pid: 4552, comm: mcelog Tainted: G           O
> 3.5.0-rc1upstream-00041-ga16e594-dirty #2 [ 1058.052235] Call Trace:
> [ 1058.052291]  [<ffffffff8109ad9a>] __might_sleep+0xda/0x100 [
> 1058.052349]  [<ffffffff8132a55b>] xen_mce_chrdev_read+0xab/0x140 [
> 1058.052408]  [<ffffffff81148d85>] vfs_read+0xc5/0x190 [ 1058.052461]
> [<ffffffff81148f4c>] sys_read+0x4c/0x90 [ 1058.052515] 
> [<ffffffff815bdd79>] system_call_fastpath+0x16/0x1 
> 
> ?

I will debug it. Would you tell me the steps to reproduce the bug, and your .config file?
(Some issue w/ my email box this morning, just notice this)

Thanks,
Jinsong--
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