Re: [Xen-devel] [XEN BUG] XEN + Qemu upstream + Qcow2 + coroutine = BOOM

["herbert cland" <herbert.cland@xxxxxxxxx>]

ï

Thxï Ian

 

I am trying to analyze the crash reason.

This BUG is only happended when using IDE disk (hd* name for vdisk).

If using SCSI disk (sd* name) in vm config file, Qemu works well.

 

---

herbert cland

 

From: Ian Campbell

Date: 2014-02-10 22:19

To: herbert cland

CC: xen-devel

Subject: Re: [Xen-devel] [XEN BUG] XEN + Qemu upstream + Qcow2 + coroutine = BOOM

On Mon, 2014-02-10 at 17:47 +0800, herbert cland wrote:

> Dear ALL!

> 

> qcow2 format disk works well with xen for most cases;

> BUT if using coroutine function such as block-stream, the qemu process

> crashed!

> And we can found following msg from cmd dmesg

> 

> qemu-system-i38[20514]: segfault at 60 ip 00007f2b60dc879a sp

> 00007ffffcc2f000 error 4 in qemu-system-i386[7f2b60cdf000+529000]

> 

> Any suggestion?

 

Please can you try installing the necessary debug symbols package (I

don't know how to do this on centos) and try and capture a core dump

(which might require adjusting rlimits) or running qemu under gdb

somehow, in either case getting a backtrace out of this crash will help

us make progress.

 

Please also take a look at

http://wiki.xen.org/wiki/Reporting_Bugs_against_Xen and see what other

info might be useful, like guest config file, which toolstack you are

using, other useful logs etc.

 

Since this is a qemu issue you might also want to include the qemu list

in your report.

 

Ian.

 

 

 

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