From mboxrd@z Thu Jan 1 00:00:00 1970 From: Konrad Rzeszutek Wilk Subject: Re: [PATCH 1/2] xen/mce: Add mcelog support for Xen platform Date: Wed, 6 Jun 2012 16:55:23 -0400 Message-ID: <20120606205523.GA10891@phenom.dumpdata.com> References: Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Return-path: Content-Disposition: inline In-Reply-To: Sender: linux-kernel-owner@vger.kernel.org To: "Liu, Jinsong" Cc: Borislav Petkov , "Luck, Tony" , "'xen-devel@lists.xensource.com'" , "'linux-kernel@vger.kernel.org'" List-Id: xen-devel@lists.xenproject.org On Thu, May 31, 2012 at 12:57:44PM +0000, Liu, Jinsong wrote: > >From 1a7951d6ca01d7f2c9dd2bdb6de5f8e7fdcb8bbd Mon Sep 17 00:00:00 2001 > From: root > 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] [] __might_sleep+0xda/0x100 [ 1058.052349] [] xen_mce_chrdev_read+0xab/0x140 [ 1058.052408] [] vfs_read+0xc5/0x190 [ 1058.052461] [] sys_read+0x4c/0x90 [ 1058.052515] [] system_call_fastpath+0x16/0x1 ?