From mboxrd@z Thu Jan 1 00:00:00 1970 From: Boris Derzhavets Subject: Re: Re: 2.6.37-rc1 mainline domU - BUG: unable to handle kernel paging request Date: Sun, 14 Nov 2010 09:09:14 -0800 (PST) Message-ID: <191297.28723.qm@web56102.mail.re3.yahoo.com> References: <1835258992.20101114175648@eikelenboom.it> Mime-Version: 1.0 Content-Type: multipart/mixed; boundary="===============1841462494==" Return-path: In-Reply-To: <1835258992.20101114175648@eikelenboom.it> List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Sender: xen-devel-bounces@lists.xensource.com Errors-To: xen-devel-bounces@lists.xensource.com To: Sander Eikelenboom Cc: Jeremy Fitzhardinge , xen-devel@lists.xensource.com, Bruce Edge , Konrad Rzeszutek Wilk List-Id: xen-devel@lists.xenproject.org --===============1841462494== Content-Type: multipart/alternative; boundary="0-1997071970-1289754554=:28723" --0-1997071970-1289754554=:28723 Content-Type: text/plain; charset=iso-8859-1 Content-Transfer-Encoding: quoted-printable > 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 comp= atible with=20 Xen. If DomU ( Ubuntu 10.04 ) is running=A0 by 2.6.36 kernel there is no any NFS= or other network related problems . Issue is specific for 2.6.37-rc1 kerne= l as kernel running DomU at Xen 4.0.1 Dom0 ( 2.6.32.25 pvops) on top of Ubu= ntu Lucid Server. Boris. -- On Sun, 11/14/10, Sander Eikelenboom wrote: From: Sander Eikelenboom Subject: Re: [Xen-devel] Re: 2.6.37-rc1 mainline domU - BUG: unable to hand= le kernel paging request To: "Boris Derzhavets" Cc: "Konrad Rzeszutek Wilk" , xen-devel@lists.xenso= urce.com, "Bruce Edge" , "Jeremy Fitzhardinge" 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 compat= ible with Xen. I'm not using NFS (I still use file: based guests, and i use glusterfs (fus= e 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.xen= dom0.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 requ= est" 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 bo= x ( Q9500,ASUS P5Q3,8GB) > Boris. > --- On Fri, 11/12/10, Konrad Rzeszutek Wilk wrot= e: > From: Konrad Rzeszutek Wilk > Subject: Re: [Xen-devel] Re: 2.6.37-rc1 mainline domU - BUG: unable to ha= ndle kernel paging request > To: "Sander Eikelenboom" > Cc: "Boris Derzhavets" , xen-devel@lists.xensource= .com, "Bruce Edge" , "Jeremy Fitzhardinge" > Date: Friday, November 12, 2010, 12:01 PM > On Fri, Nov 12, 2010 at 05:27:43PM +0100, Sander Eikelenboom wrote: >> Hi Bruce, >>=20 >> Perhaps handpick some kernels before and after the pulls of the xen patc= hes (pv-on-hvm etc) to begin with ? >> When you let git choose, especially with rc-1 kernels, you will end up w= ith kernels in between patch series, resulting in panics. > Well, just the bare-bone boot of PV guests with nothing fancy ought to wo= rk. > 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 bisect= s 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@lists.xensource.com > http://lists.xensource.com/xen-devel >=A0 =A0 =A0=A0=A0 --=20 Best regards, Sander=A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 mailto:linux= @eikelenboom.it =0A=0A=0A --0-1997071970-1289754554=:28723 Content-Type: text/html; charset=iso-8859-1 Content-Transfer-Encoding: quoted-printable
> Hmmm have you tried do do a lot of I/O w= ith something else as NFS ?

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

> That would perhaps pinpo= int 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 an= y 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 o= f Ubuntu Lucid Server.

Boris.





-- On Sun, 1= 1/14/10, Sander Eikelenboom <linux@eikelenboom.it> wrote:<= br>

From: Sander Eikelenboom <linux@eikelenboo= m.it>
Subject: Re: [Xen-devel] Re: 2.6.37-rc1 mainline domU - BUG: un= able to handle kernel paging request
To: "Boris Derzhavets" <bderzhav= ets@yahoo.com>
Cc: "Konrad Rzeszutek Wilk" <konrad.wilk@oracle.com= >, xen-devel@lists.xensource.com, "Bruce Edge" <bruce.edge@gmail.com&= gt;, "Jeremy Fitzhardinge" <jeremy@goop.org>
Date: Sunday, Novembe= r 14, 2010, 11:56 AM

Hmmm have you tried do= do a lot of I/O with something else as NFS ?
That would perhaps pinpoin= t 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 ba= sed 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 p= roblems 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, N= ovember 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 X= en 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 , reg= ardless kernel crash as "unable to handle page request" was reported once b= y F14 DomU, but it didn't actually crash DomU. Same excersises with replace= ment 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@oracle.com> wrote:

> From: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
> Subject: Re: [Xen-devel] Re: 2.6.37= -rc1 mainline domU - BUG: unable to handle kernel paging request
> To= : "Sander Eikelenboom" <linux@eikelenboom.it>
= > Cc: "Boris Derzhavets" <bderzhavets@yahoo.com&= gt;, xen-devel@lists.xensource.com, "B= ruce Edge" <bruce.edge@gmail.com>, "Jeremy Fitzhar= dinge" <jeremy@goop.org>
> Date: Friday, November 12, 2010, 12:01 P= M

> 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 b= egin with ?
>> When you let git choose, especially with rc-1 kerne= ls, you will end up with kernels in between patch series, resulting in pani= cs.

> Well, just the bare-bone boot of PV guests with nothing fan= cy 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 g= it
>> > rookie.
>> > I picked 2.6.36 - 2.6.37-rc1 a= s the bisect range and my first 2 bisects all
>> > panic at boo= t so I'm obviously doing something wrong.
>> > I'll RTFM a bit more and keep at it.

> .. as Bruce experiences this is not the c= ase. Hmm..

> _______________________________________________
&= gt; Xen-devel mailing list
> Xen-dev= el@lists.xensource.com
> http://lists.xensource.com/xen-devel

=

>       



--
Best reg= ards,
Sander                &nb= sp;           mailto:linux@eikelenb= oom.it


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