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[Xen-devel] Re: Xen paravirt frontend block hang

To: "Christopher S. Aker" <caker@xxxxxxxxxxxx>
Subject: [Xen-devel] Re: Xen paravirt frontend block hang
From: Jeremy Fitzhardinge <jeremy@xxxxxxxx>
Date: 2008年3月02日 07:35:13 -0800
Cc: Xen-devel <xen-devel@xxxxxxxxxxxxxxxxxxx>, Linux Kernel Mailing List <linux-kernel@xxxxxxxxxxxxxxx>, virtualization@xxxxxxxxxxxxxxxxxxxxxxxxxx
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Christopher S. Aker wrote:
Jeremy Fitzhardinge wrote:
I've been running this all night without seeing any problem. I'm using current x86.git#testing with a few local patches, but nothing especially relevent-looking.
Meh .. what backend are you using? We're using LVM volumes exported directly into the domUs like so:
disk =[ 'phy:vg1/xencaker-56392,xvda,w', ... ]
Could you try the attached patch to see if it makes any difference?
Unfortunately we're still in the same place... pv_ops kernels are still hanging after heavy disk IO:
works - 2.6.18.x (from xen-unstable)
hangs - 2.6.25-rc3-git3
hangs - 2.6.25-rc3-git3 + your patch
Any other suggestions or debugging I can provide that would be useful to squash this?
Are you running an SMP or UP domain? I found I could get hangs very easily with UP (but I need confirm it isn't a result of some other very experimental patches).
 J
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