Re: [Xen-devel] Re: 2.6.37-rc1 mainline domU - BUG: unable to handle kernel paging request

[Sander Eikelenboom <linux@xxxxxxxxxxxxxx>]

Ahh i see that patch contains the patches i mentioned already.


Sunday, November 14, 2010, 6:47:25 PM, you wrote:

> This is not exactly git8 . Michael Young applied attached patch on top of 
> git8.
> It's  his the most recent submission to fedora-xen.
> http://koji.fedoraproject.org/koji/taskinfo?taskID=2598434 


> Boris.

> --- On Sun, 11/14/10, Sander Eikelenboom <linux@xxxxxxxxxxxxxx> wrote:

> From: Sander Eikelenboom <linux@xxxxxxxxxxxxxx>
> Subject: Re: [Xen-devel] Re: 2.6.37-rc1 mainline domU - BUG: unable to handle 
> kernel paging request
> To: "Boris Derzhavets" <bderzhavets@xxxxxxxxx>
> Cc: "Konrad Rzeszutek Wilk" <konrad.wilk@xxxxxxxxxx>, 
> xen-devel@xxxxxxxxxxxxxxxxxxx, "Bruce Edge" <bruce.edge@xxxxxxxxx>, "Jeremy 
> Fitzhardinge" <jeremy@xxxxxxxx>
> Date: Sunday, November 14, 2010, 12:19 PM

> Perhaps these patches (especially Stefano's) could make a difference ?

> http://lkml.indiana.edu/hypermail/linux/kernel/1011.1/02348.html

> I don't think these are applied to your domU kernel  since it's git8, it 
> worth the shot i guess...

> --
> Sander

> Sunday, November 14, 2010, 6:09:14 PM, you wrote:

>>> Hmmm have you tried do do a lot of I/O with something else as NFS ?

>> I've tried scp a lot from DomU to Dom0 on F14 no problems, on Ubuntu 10.04 
>> Server
>> DomU as NFS client cannot survive more then a 2-3 min with I/O generated by 
>> scp.
>> If i unmount NFS share everything goes fine ( Ubuntu 10.04)

>>> That would perhaps pinpoint it to NFS doing something not completely 
>>> compatible with 
>> Xen.

>> If DomU ( Ubuntu 10.04 ) is running  by 2.6.36 kernel there is no any NFS or 
>> other network related problems . Issue is specific for 2.6.37-rc1 kernel as 
>> kernel running DomU at Xen 4.0.1 Dom0 ( 2.6.32.25 pvops) on top of Ubuntu 
>> Lucid Server.

>> Boris.





>> -- On Sun, 11/14/10, Sander Eikelenboom <linux@xxxxxxxxxxxxxx> wrote:

>> From: Sander Eikelenboom <linux@xxxxxxxxxxxxxx>
>> Subject: Re: [Xen-devel] Re: 2.6.37-rc1 mainline domU - BUG: unable to 
>> handle kernel paging request
>> To: "Boris Derzhavets" <bderzhavets@xxxxxxxxx>
>> Cc: "Konrad Rzeszutek Wilk" <konrad.wilk@xxxxxxxxxx>, 
>> xen-devel@xxxxxxxxxxxxxxxxxxx, "Bruce Edge" <bruce.edge@xxxxxxxxx>, "Jeremy 
>> Fitzhardinge" <jeremy@xxxxxxxx>
>> Date: Sunday, November 14, 2010, 11:56 AM

>> 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'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..

>>> _______________________________________________
>>> Xen-devel mailing list
>>> Xen-devel@xxxxxxxxxxxxxxxxxxx
>>> http://lists.xensource.com/xen-devel



>>>       









-- 
Best regards,
 Sander                            mailto:linux@xxxxxxxxxxxxxx


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