Xen users - Nov 2007 - Kernel seems to crash in a xen environment and using crossover-office/ wine

Hello Listmembers,

iam running Fedora 8 into a Xen Environment. My Kernel on the domU is
2.6.21-2950.fc8xen. This domU has 1024M of Ram assigned. When iam
starting the Crossover Installer Wizard and choose Install Internet
Explorer 6 SP1 then the Kernel seems to crash. With the virt-manager i
had taken a Screenshot from the console, he is attached. If iam lowering
the Memory to 512M the Crash comes later in the Setup or using. 
Additionally i found these messages too:
=== 8< ==4gb seg fixup, process exe (pid 2457), cs:ip 73:0804d5a1
4gb seg fixup, process exe (pid 2457), cs:ip 73:0804d5a1
4gb seg fixup, process exe (pid 2457), cs:ip 73:00aea736
4gb seg fixup, process exe (pid 2457), cs:ip 73:0804d596
4gb seg fixup, process exe (pid 2457), cs:ip 73:00aebcb0
4gb seg fixup, process exe (pid 2457), cs:ip 73:0804d5a1
4gb seg fixup, process exe (pid 2457), cs:ip 73:00aea736
4gb seg fixup, process exe (pid 2457), cs:ip 73:0804d5a1
4gb seg fixup, process exe (pid 2457), cs:ip 73:00c153e7
4gb seg fixup, process exe (pid 2457), cs:ip 73:0804d596
printk: 171 messages suppressed.
=== 8< ==If iam using some Windows Software with Crossover then i found after
2-4
minutes the following in my dmesg:
=== 8< ==4gb seg fixup, process wine-pthread (pid 2857), cs:ip 73:741dfb5a
printk: 164944 messages suppressed.
=== 8< ==the problem can definitly influenced through the memory
dimensioning. I
dont know why the machine knows that he had 4G of memory at all.

You can download here the created core dump.
http://daniel.rindt.name/fileadmin/download/2007-1123-2039.25-nxserver.8.core.bz2

In hope for answer and suggestions how to avoid/ solve that - many
thanks in advance. Thanks for reading this mail.

-Daniel




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Another Screenshot i had taken, i hope thats more useful information. A
core dump is taken too. i can upload it on demand, if someone need.

Thanks
Daniel



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I''m moving this to xen-devel as it looks like a bug.

I''m cc-ing xen-users for the record but please remove xen-users from
the
recipients before replying.  Thanks.

Cheers,
Mark

On Wednesday 28 November 2007, Daniel Rindt wrote:
> Hello Listmembers,
>
> iam running Fedora 8 into a Xen Environment. My Kernel on the domU is
> 2.6.21-2950.fc8xen. This domU has 1024M of Ram assigned. When iam
> starting the Crossover Installer Wizard and choose Install Internet
> Explorer 6 SP1 then the Kernel seems to crash. With the virt-manager i
> had taken a Screenshot from the console, he is attached. If iam lowering
> the Memory to 512M the Crash comes later in the Setup or using.
> Additionally i found these messages too:
> === 8< ==> 4gb seg fixup, process exe (pid 2457), cs:ip 73:0804d5a1
> 4gb seg fixup, process exe (pid 2457), cs:ip 73:0804d5a1
> 4gb seg fixup, process exe (pid 2457), cs:ip 73:00aea736
> 4gb seg fixup, process exe (pid 2457), cs:ip 73:0804d596
> 4gb seg fixup, process exe (pid 2457), cs:ip 73:00aebcb0
> 4gb seg fixup, process exe (pid 2457), cs:ip 73:0804d5a1
> 4gb seg fixup, process exe (pid 2457), cs:ip 73:00aea736
> 4gb seg fixup, process exe (pid 2457), cs:ip 73:0804d5a1
> 4gb seg fixup, process exe (pid 2457), cs:ip 73:00c153e7
> 4gb seg fixup, process exe (pid 2457), cs:ip 73:0804d596
> printk: 171 messages suppressed.
> === 8< ==> If iam using some Windows Software with Crossover then i
found after 2-4
> minutes the following in my dmesg:
> === 8< ==> 4gb seg fixup, process wine-pthread (pid 2857), cs:ip
73:741dfb5a
> printk: 164944 messages suppressed.
> === 8< ==> the problem can definitly influenced through the memory
dimensioning. I
> dont know why the machine knows that he had 4G of memory at all.
>
> You can download here the created core dump.
> http://daniel.rindt.name/fileadmin/download/2007-1123-2039.25-nxserver.8.co
>re.bz2
>
> In hope for answer and suggestions how to avoid/ solve that - many
> thanks in advance. Thanks for reading this mail.
>
> -Daniel


-- 
Dave: Just a question. What use is a unicyle with no seat?  And no pedals!
Mark: To answer a question with a question: What use is a skateboard?
Dave: Skateboards have wheels.
Mark: My wheel has a wheel!

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Am Montag, den 03.12.2007, 04:35 +0000 schrieb Mark
Williamson:
> I''m moving this to xen-devel as it looks like a bug.
> 
> I''m cc-ing xen-users for the record but please remove xen-users
from the
> recipients before replying.  Thanks.
Hi Mark,

i''m happy that someone read my post finally. :) I''m subscribed
to the
devel list now, so someone can request information they need to fix.

Thanks
Daniel
> 
> Cheers,
> Mark
> 
> On Wednesday 28 November 2007, Daniel Rindt wrote:
> > Hello Listmembers,
> >
> > iam running Fedora 8 into a Xen Environment. My Kernel on the domU is
> > 2.6.21-2950.fc8xen. This domU has 1024M of Ram assigned. When iam
> > starting the Crossover Installer Wizard and choose Install Internet
> > Explorer 6 SP1 then the Kernel seems to crash. With the virt-manager i
> > had taken a Screenshot from the console, he is attached. If iam
lowering
> > the Memory to 512M the Crash comes later in the Setup or using.
> > Additionally i found these messages too:
> > === 8< ==> > 4gb seg fixup, process exe (pid 2457), cs:ip
73:0804d5a1
> > 4gb seg fixup, process exe (pid 2457), cs:ip 73:0804d5a1
> > 4gb seg fixup, process exe (pid 2457), cs:ip 73:00aea736
> > 4gb seg fixup, process exe (pid 2457), cs:ip 73:0804d596
> > 4gb seg fixup, process exe (pid 2457), cs:ip 73:00aebcb0
> > 4gb seg fixup, process exe (pid 2457), cs:ip 73:0804d5a1
> > 4gb seg fixup, process exe (pid 2457), cs:ip 73:00aea736
> > 4gb seg fixup, process exe (pid 2457), cs:ip 73:0804d5a1
> > 4gb seg fixup, process exe (pid 2457), cs:ip 73:00c153e7
> > 4gb seg fixup, process exe (pid 2457), cs:ip 73:0804d596
> > printk: 171 messages suppressed.
> > === 8< ==> > If iam using some Windows Software with
Crossover then i found after 2-4
> > minutes the following in my dmesg:
> > === 8< ==> > 4gb seg fixup, process wine-pthread (pid 2857),
cs:ip 73:741dfb5a
> > printk: 164944 messages suppressed.
> > === 8< ==> > the problem can definitly influenced through the
memory dimensioning. I
> > dont know why the machine knows that he had 4G of memory at all.
> >
> > You can download here the created core dump.
> >
http://daniel.rindt.name/fileadmin/download/2007-1123-2039.25-nxserver.8.co
> >re.bz2
> >
> > In hope for answer and suggestions how to avoid/ solve that - many
> > thanks in advance. Thanks for reading this mail.
> >
> > -Daniel
> 
> 
> 
-- 
Mit freundlichen Grüßen
Daniel Rindt
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On 3/12/07 08:41, "Daniel Rindt" <drindt@mx-solutions.de> wrote:
> Am Montag, den 03.12.2007, 04:35 +0000 schrieb Mark Williamson:
>> I''m moving this to xen-devel as it looks like a bug.
>> 
>> I''m cc-ing xen-users for the record but please remove
xen-users from the
>> recipients before replying.  Thanks.
> Hi Mark,
> 
> i''m happy that someone read my post finally. :) I''m
subscribed to the
> devel list now, so someone can request information they need to fix.
It may well be fixed by xen-unstable changesets 16406, 16407 and 16408.

 -- Keir



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Am Montag, den 03.12.2007, 18:18 +0000 schrieb Keir
Fraser:
> On 3/12/07 08:41, "Daniel Rindt" <drindt@mx-solutions.de>
wrote:
> 
> > Am Montag, den 03.12.2007, 04:35 +0000 schrieb Mark Williamson:
> >> I''m moving this to xen-devel as it looks like a bug.
> >> 
> >> I''m cc-ing xen-users for the record but please remove
xen-users from the
> >> recipients before replying.  Thanks.
> > Hi Mark,
> > 
> > i''m happy that someone read my post finally. :) I''m
subscribed to the
> > devel list now, so someone can request information they need to fix.
> 
> It may well be fixed by xen-unstable changesets 16406, 16407 and 16408.
Hello Keir,

the numbers above a represent what? bugreports? Iam not sure which part
of xen must be replaced. Is it the xen-kernel into my the affected domU?
Possibly that a rpm exits for Fedora Distro?

And how to support the Fedora Development team to integrate the fix?


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On 3/12/07 18:34, "Daniel Rindt" <drindt@mx-solutions.de> wrote:
>> It may well be fixed by xen-unstable changesets 16406, 16407 and 16408.
> Hello Keir,
> 
> the numbers above a represent what? bugreports? Iam not sure which part
> of xen must be replaced. Is it the xen-kernel into my the affected domU?
> Possibly that a rpm exits for Fedora Distro?
> 
> And how to support the Fedora Development team to integrate the fix?
They are changeset numbers. One of the fixes is to extend the 4gb segment
fixup code to work with a wider range of processor instructions. That looks
to be the issue you are hitting.

I don''t know how easy it would be to try these changes in FC8. If you
can
get the FC8 Xen sources then you could export the patches from the
xen-unstable repo and apply themn to the FC8 tree. Or you could try building
and installing xen-unstable Xen on top of FC8.

 -- Keir



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> Hello Keir,
>
> the numbers above a represent what? bugreports? Iam not sure which part
> of xen must be replaced. Is it the xen-kernel into my the affected domU?
> Possibly that a rpm exits for Fedora Distro?
These are changeset numbers in the mercurial repository for xen-unstable (a 
changeset is roughly "a patch" from the development history).

If you were to clone a copy of the repository and build it, you could test for 
yourself whether it works.  You''d need to uninstall all the fedora Xen
stuff
first.
> And how to support the Fedora Development team to integrate the fix?
If you report the bug (plus how to reproduce) to them and mention those 
changesets in your report then they might be able to backport the fixes, I 
guess...  In which case, it would be helpful to them to know if those patches 
do fix your problem.  It''d be understandable if you didn''t
want to build Xen
yourself, though.

Alternatively, it may well get fixed in a newer release of Fedora when they 
roll in an updated upstream Xen version.

Final thought: if we did verify that those changeset fixed the problem, 
perhaps they could be rolled into a point release of 3.1, then maybe Fedora 
could just pull that in (Keir?  thoughts?)

Cheers,
Mark

-- 
Dave: Just a question. What use is a unicyle with no seat?  And no pedals!
Mark: To answer a question with a question: What use is a skateboard?
Dave: Skateboards have wheels.
Mark: My wheel has a wheel!

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http://lists.xensource.com/xen-devel

On 3/12/07 18:54, "Mark Williamson"
<mark.williamson@cl.cam.ac.uk> wrote:
> Final thought: if we did verify that those changeset fixed the problem,
> perhaps they could be rolled into a point release of 3.1, then maybe Fedora
> could just pull that in (Keir?  thoughts?)
Yes, they are a possibility for 3.1.3.

 -- Keir



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On Mon, Dec 03, 2007 at 07:34:37PM +0100, Daniel Rindt
wrote:
> 
> Am Montag, den 03.12.2007, 18:18 +0000 schrieb Keir Fraser:
> > On 3/12/07 08:41, "Daniel Rindt"
<drindt@mx-solutions.de> wrote:
> > 
> > > Am Montag, den 03.12.2007, 04:35 +0000 schrieb Mark Williamson:
> > >> I''m moving this to xen-devel as it looks like a bug.
> > >> 
> > >> I''m cc-ing xen-users for the record but please
remove xen-users from the
> > >> recipients before replying.  Thanks.
> > > Hi Mark,
> > > 
> > > i''m happy that someone read my post finally. :)
I''m subscribed to the
> > > devel list now, so someone can request information they need to
fix.
> > 
> > It may well be fixed by xen-unstable changesets 16406, 16407 and
16408.
> Hello Keir,
> 
> the numbers above a represent what? bugreports? Iam not sure which part
> of xen must be replaced. Is it the xen-kernel into my the affected domU?
> Possibly that a rpm exits for Fedora Distro?
> 
> And how to support the Fedora Development team to integrate the fix?
File a bug report for your problem at bugzilla.redhat.com and mention
the changesets believed to fix it & preferably a way to reproduce the
problem.  It''ll then get on the list of things to add in an update
to Xen in appropriate Fedora releases.

Fedora 7 / 8 are on the 3.1.x series of Xen releases (userspace has just
been updated to the official 3.1.2 release).

Regards,
Dan.
-- 
|=- Red Hat, Engineering, Emerging Technologies, Boston.  +1 978 392 2496 -=|
|=-           Perl modules: http://search.cpan.org/~danberr/              -=|
|=-               Projects: http://freshmeat.net/~danielpb/               -=|
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On Mon, Dec 03, 2007 at 06:57:59PM +0000, Keir Fraser
wrote:
> On 3/12/07 18:54, "Mark Williamson"
<mark.williamson@cl.cam.ac.uk> wrote:
> 
> > Final thought: if we did verify that those changeset fixed the
problem,
> > perhaps they could be rolled into a point release of 3.1, then maybe
Fedora
> > could just pull that in (Keir?  thoughts?)
> 
> Yes, they are a possibility for 3.1.3.
We''re tracking the 3.1.x tree for Fedora 7 & 8, so if they go into
to 3.1.3
that''d be useful

Regards,
Dan.
-- 
|=- Red Hat, Engineering, Emerging Technologies, Boston.  +1 978 392 2496 -=|
|=-           Perl modules: http://search.cpan.org/~danberr/              -=|
|=-               Projects: http://freshmeat.net/~danielpb/               -=|
|=-  GnuPG: 7D3B9505   F3C9 553F A1DA 4AC2 5648 23C1 B3DF F742 7D3B 9505  -=| 

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Am Montag, den 03.12.2007, 18:54 +0000 schrieb Mark
Williamson:
> These are changeset numbers in the mercurial repository for
> xen-unstable (a 
> changeset is roughly "a patch" from the development history).
> 
> If you were to clone a copy of the repository and build it, you could
> test for 
> yourself whether it works.  You''d need to uninstall all the fedora
Xen
> stuff 
> first.
Grant me the following questions please:

1. Mark: where to checkout the Code?
2. Daniel: i will test the code with the fixes, and if the problem still
persists then i will file a bug. i had understand this right?


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> Grant me the following questions please:
>
> 1. Mark: where to checkout the Code?
http://xenbits.xensource.com/xen-unstable.hg

Check it out using "hg clone
http://xenbits.xensource.com/xen-unstable.hg"

Alternatively you could try just extracting the patches Keir suggested and 
applying those to the Fedora tree, I suppose.

You''ll need to make sure you''ve uninstalled your Fedora Xen
before you install
xen-unstable.  You''ll also need to make sure that you uninstall
xen-unstable
before you reinstall Fedora Xen...  xen-unstable installs using a script, not 
a package manager, so you''ll have to be careful (and the
"uninstall" function
is not well tested) to hunt down and remove all the Xen-related stuff when 
you want to move back to Fedora''s packages.  If necessary you can
probably
get rid of all the ones that matter by manual deletion.

Hope that helps, let us know if you have more questions,

Cheers,
Mark
> 2. Daniel: i will test the code with the fixes, and if the problem still
> persists then i will file a bug. i had understand this right?


-- 
Dave: Just a question. What use is a unicyle with no seat?  And no pedals!
Mark: To answer a question with a question: What use is a skateboard?
Dave: Skateboards have wheels.
Mark: My wheel has a wheel!

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On Mon, Dec 03, 2007 at 08:27:11PM +0100, Daniel Rindt
wrote:
> Am Montag, den 03.12.2007, 18:54 +0000 schrieb Mark Williamson:
> > These are changeset numbers in the mercurial repository for
> > xen-unstable (a 
> > changeset is roughly "a patch" from the development
history).
> > 
> > If you were to clone a copy of the repository and build it, you could
> > test for 
> > yourself whether it works.  You''d need to uninstall all the
fedora Xen
> > stuff 
> > first.
> Grant me the following questions please:
> 
> 1. Mark: where to checkout the Code?
> 2. Daniel: i will test the code with the fixes, and if the problem still
> persists then i will file a bug. i had understand this right?
File a bug against Fedora Xen regardless, so we know that its a fix we need to
pull into the RPMs we distribute.

Regards,
Dan.
-- 
|=- Red Hat, Engineering, Emerging Technologies, Boston.  +1 978 392 2496 -=|
|=-           Perl modules: http://search.cpan.org/~danberr/              -=|
|=-               Projects: http://freshmeat.net/~danielpb/               -=|
|=-  GnuPG: 7D3B9505   F3C9 553F A1DA 4AC2 5648 23C1 B3DF F742 7D3B 9505  -=| 

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