On Sun, Nov 14, 2010 at 8:56 AM, Sander Eikelenboom
<
linux@xxxxxxxxxxxxxx> wrote:
> Hmmm have you tried do do a lot of I/O with something else as NFS ?
> That would perhaps pinpoint it to NFS doing something not completely compatible with Xen.
I have my own suspicions regarding the more recent NFS clients. Post
10.04 Ubuntu variants do not tolerate large NFS transfers even without
Xen. Any more than a few 100 Megs and you start getting 'task blocked
for more than 120 sec..." messages along with stack traces showing
part of the NFS call stack.
Perhaps a parallel effort could be to test the
2.6.37-rc1 kernel with
something other than NFS for remote filesystems. I'll see if I get the
same problems with glusterfs.
-Bruce
>
> I'm not using NFS (I still use file: based guests, and i use glusterfs (fuse based userspace cluster fs) to share diskspace to domU's via ethernet).
> I tried NFS in the past, but had some troubles setting it up, and even more problems with disconnects.
>
> I haven't seen any "unable to handle page request" problems with my mix of guest kernels, which includes some 2.6.37-rc1 kernels.
>
> --
>
> Sander
>
>
>
>
>
> Sunday, November 14, 2010, 5:37:59 PM, you wrote:
>
>> I've tested F14 DomU (kernel vmlinuz-2.6.37-0.1.rc1.git8.xendom0.fc14.x86_64) as NFS client and Xen 4.0.1 F14 Dom0 (kernel vmlinuz-2.6.32.25-172.xendom0.fc14.x86_64) as NFS server . Copied 700 MB ISO images from NFS folder at Dom0 to
DomU and scp'ed them back to Dom0. During about 30 - 40 min DomU ran pretty stable , regardless kernel crash as "unable to handle page request" was reported once by F14 DomU, but it didn't actually crash DomU. Same excersises with replacement F14 by Ubuntu 10.04 Server results DomU crash in about several minutes. Dom0's instances dual boot on same development box ( Q9500,ASUS P5Q3,8GB)
>
>> Boris.
>
>> --- On Fri, 11/12/10, Konrad Rzeszutek Wilk <
konrad.wilk@xxxxxxxxxx> wrote:
>
>> From: Konrad Rzeszutek Wilk <
konrad.wilk@xxxxxxxxxx>
>> Subject: Re: [Xen-devel] Re: 2.6.37-rc1 mainline domU - BUG: unable to handle kernel paging request
>> To: "Sander Eikelenboom" <
linux@xxxxxxxxxxxxxx>
>> Cc: "Boris Derzhavets" <
bderzhavets@xxxxxxxxx>,
xen-devel@xxxxxxxxxxxxxxxxxxx, "Bruce Edge" <
bruce.edge@xxxxxxxxx>, "Jeremy Fitzhardinge" <
jeremy@xxxxxxxx>
>> Date: Friday, November 12, 2010, 12:01 PM
>
>> On Fri, Nov 12, 2010 at 05:27:43PM +0100, Sander Eikelenboom wrote:
>>> Hi Bruce,
>>>
>>> Perhaps handpick some kernels before and after the pulls of the xen patches (pv-on-hvm etc) to begin with
?
>>> When you let git choose, especially with rc-1 kernels, you will end up with kernels in between patch series, resulting in panics.
>
>> Well, just the bare-bone boot of PV guests with nothing fancy ought to work.
>
>> But that is the theory and ..
>>> > The git bisecting is slow going. I've never tried that before and I'm a git
>>> > rookie.
>>> > I picked 2.6.36 - 2.6.37-rc1 as the bisect range and my first 2 bisects all
>>> > panic at boot so I'm obviously doing something wrong.
>>> > I'll RTFM a bit more and keep at it.
>
>> .. as Bruce experiences this is not the case. Hmm..
>
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>
>
>>
>
>
>
> --
> Best regards,
> Sander mailto:
linux@xxxxxxxxxxxxxx>
>
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