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[Xen-devel] tap:qcow causes dom-U to hang in 3.0.4-rc1

  • To: Xen Devel <xen-devel@xxxxxxxxxxxxxxxxxxx>
  • From: Hiromichi Itou <ito@xxxxxxxx>
  • Date: Fri, 15 Dec 2006 14:24:53 +0900
  • Delivery-date: Thu, 14 Dec 2006 21:25:12 -0800
  • List-id: Xen developer discussion <xen-devel.lists.xensource.com>


This problem had been discussed on this ML before.
Please refer to following URL.
http://lists.xensource.com/archives/html/xen-devel/2006-11/ msg00391.html

This problem still remains in Xen 3.0.4-rc1. (I tested on x86-64.)

Steps to Reproduce:

1) Create bootable DomainU image.
dd if=/dev/zero of=/var/images/storage.disk1.sys1 bs=1024k count=1 seek=8191

2) Create qcow file that has backing file.
        qcow-create 100 /var/images/qcowbak.img /var/images/storage.disk1.sys1

3) Boot DomainU that has below config.
        disk = [ 'tap:qcow:/var/images/qcowbak.img.img,hda,w' ]

I plan to start the investigation of the cause of this problem.

Has anyone already solved this problem?

Hiromichi Ito
Director of Engineering Department
Begi.net (http://Begi.net)

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