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Re: [Xen-API] XCP 1.0-beta: md on dom0 kernel causes kernel oops

To: Daniel Stodden <daniel.stodden@xxxxxxxxxx>
Subject: Re: [Xen-API] XCP 1.0-beta: md on dom0 kernel causes kernel oops
From: Tomoe Sugihara <sugihara@xxxxxxxxxxxxx>
Date: Thu, 16 Dec 2010 09:44:02 +0900
Cc: "xen-api@xxxxxxxxxxxxxxxxxxx" <xen-api@xxxxxxxxxxxxxxxxxxx>, Jonathan Ludlam <Jonathan.Ludlam@xxxxxxxxxxxxx>, Rob Brady <diginerd@xxxxxxxxx>, Simon Rowe <Simon.Rowe@xxxxxxxxxxxxx>
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On 12/16/2010 06:20 AM, Daniel Stodden wrote:
On Wed, 2010-12-15 at 05:58 -0500, Tomoe Sugihara wrote:

We would really like this to be addressed so we can test
XCP 1.0 beta with our SM backend driver.

I found the author and the log for the patch that introduces the oops from the 
following link.
http://xenbits.xen.org/XCP/linux-2.6.32.pq.hg?annotate/2d68a42120cf/blktap2-ioc.diff

I didn't get what it is for, but I hope the author may be able to help this 
fixed.

Yeah, looks like this queue got tagged for XCP on a quite unfortunate
edge, indeed. The patch series has long been fixed since then, but
merged a little further on trunk, so I can't just offer you a
replacement for the -ioc diff.


Thanks for following this up, Daniel.
I'll wait for a fixed kernel.

Hi,
I'm still looking forward to a fixed kernel.

One could replace the entire blktap2-series, or maybe there's a bigger
update already in the make (?).

Any update on this? I hope someone is working on the issue.

Daniel,
Thanks for sending me a set of patches off line.
Sorry, I haven't had a chance to try, though.

Ok, big sorry. The issue is indeed due to said blktapisms in the present
2.6.32 kernel -- but as Jon Ludlam pointed out, it's not really just due
to repo drift seen. Different issue, so those updates I sent to Tomoe
won't help much.

There's a fix internally available now, so next update should really
resolve this.

Jon, Daniel

Many thanks for your help.
Got it. I look forward to the next public update:)

Tomoe






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