Re: Re: Weird Issue with raid 5+0

[chris <tknchris@gmail.com>]

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
possibility.

 -chris

On Mon, Mar 8, 2010 at 6:26 PM, Jeremy Fitzhardinge <jeremy@goop.org> 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
>