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Re: [Xen-devel] Re: Weird Issue with raid 5+0

To: Jeremy Fitzhardinge <jeremy@xxxxxxxx>
Subject: Re: [Xen-devel] Re: Weird Issue with raid 5+0
From: chris <tknchris@xxxxxxxxx>
Date: Mon, 8 Mar 2010 19:48:53 -0500
Cc: linux-raid@xxxxxxxxxxxxxxx, Neil Brown <neilb@xxxxxxx>, Xen-Devel List <xen-devel@xxxxxxxxxxxxxxxxxxx>
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I will test with xenlinux 2.6.18, as far as pv_ops dom0 does this work
with any version of the hypervisor? The current system is running 3.2
which is pretty old so I just assumed pv_ops wouldn't be a


On Mon, Mar 8, 2010 at 6:26 PM, Jeremy Fitzhardinge <jeremy@xxxxxxxx> wrote:
> On 03/08/2010 07:35 AM, chris wrote:
>> I forwarding this to xen-devel because it appears to be a bug in dom0
>> kernel.
>> I recently experienced a strange issue with software raid1+0 under Xen
>> on a new machine. I was getting corruption in my guest volumes and
>> tons of kernel messages such as:
>> [305044.571962] raid0_make_request bug: can't convert block across
>> chunks or bigger than 64k 14147455 4
>> The full thread is located at http://marc.info/?t=126672694700001&r=1&w=2
>> Detailed output at http://pastebin.com/f6a52db74
>> It appears after speaking with the linux-raid mailing list that this
>> is due a bug which has been fixed but the fix is not included in the
>> dom0 kernel. I'm not sure what sources kernel 2.6.26-2-xen-amd64 is
>> based on, but since xenlinux is still at 2.6.18 I was assuming that
>> this bug would still exist.
> There are a number of possible dom0 kernel in use.  The xen.org 2.6.18-xen
> tree is still maintained on a bugfix basis.  Are you seeing the problem with
> 2.6.18-xen?
> I don't know what 2.6.26-2-xen-amd64 is, but I'm guessing from the name it
> is a Debian kernel.  I don't know what its provenance is, but it is not a
> xen.org supported kernel; if a fix is needed you should file a bug against
> your distro.
> Modern Xen kernels are based on 2.6.31.x and 2.6.32.x.  See
> http://wiki.xensource.com/xenwiki/XenParavirtOps and
> http://wiki.xensource.com/xenwiki/XenDom0Kernels for more details.
>    J

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