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After a few day of off and on testing it would appear that adding
"nousb" to the 2.6 kernel boot options in the grub config fixes this
problem. I have tested with the last few days of unstable builds
without a hang. I have no idea why this works but, so far it does. I
have not had a chance to test much with 2.0.6 so I can't say for sure
if the same holds true there.

I should have some time in the next day or two to try to track this
issue down. If anyone cares to point me in the right direction they
could probably save me a great deal of time.

David

On 5/25/05, Gino LV. Ledesma <gledesma@gmail.com> wrote:
> On 5/10/05, David H <davidh.davidh@xxxxxxxx> wrote:
> > On 5/10/05, Rob See <rob@xxxxxxxx> wrote:
> >> This seems to have fixed the problem. I didn't get the usual lock=
> >> up running either command that guaranteed me a hang in the past. Are there
> >> any side effects to the ignorebiostables option that I need to be aware
> >> of. Will there be a proper patch to address this issue ?
> >
> > It will make your shiny new dual proc hyperthreaded system look like a
> > single CPU non-ht machine to xen. Other than that it's no problem. :)
> >
>
> I'm having the same issues as Rob on a Dell PE1850 with LSI (53c1030)
> rev 08. With Xen 2.0.6 (Kernel 2.6.11), the system immediately freezes
> (hard lock-up) upon any intensive I/O (be it rsync, cp, tar, dd).
> Using ignorebiostables works, though not having SMP is a bummer.
>
> Are there any other workarounds to this (unstable? kernel patch?)?
> There was a post that mentioned something about ServerWorks issue in
> the kernel. I'll do more testing. Any help is appreviated.
>
> Thanks!
>
> gino ledesma
>
> _______________________________________________
> Xen-users mailing list
> Xen-users@lists.xensource.com
> http://lists.xensource.com/xen-users
>

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> After a few day of off and on testing it would appear that
> adding "nousb" to the 2.6 kernel boot options in the grub
> config fixes this problem. I have tested with the last few
> days of unstable builds without a hang. I have no idea why
> this works but, so far it does. I have not had a chance to
> test much with 2.0.6 so I can't say for sure if the same
> holds true there.

Interesting. This might turn out just to be a differnce in kernel config
between the xen and native kernels you've tried. It might be interesting
to compile up a stock 2.6.11.10 native kernel with a config as close as
possible to the xen0 one, and see if the same problem is exhibited.

Also, if there are any USB options in the BIOS (e.g. legacy support) it
might be interesting to know if they have any effect.

It would be particularly interesting to know what the unstable tree does
on these systems, as the code is quite different.

Best,
Ian

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> It would be particularly interesting to know what the unstable tree does
> on these systems, as the code is quite different.

I may not have been clear; I have been testing with "unstable". If I
build unstable with the default configuration and boot dom0 with the
following grub entry I can make dom0 hang using a number of IO
intensive commands. Tar, cp, mkfs, all can cause the problem and
using scp to copy a large file to another machine will hang the domain
in no time. Xen still responds on the serial console.

title Xen 2.0.6 / XenLinux 2.6.11
root (hd0,0)
kernel /xen.gz dom0_mem=131072 console=com1 watchdog com1=115200,8n1
module /vmlinuz-2.6.11-xen0 root=/dev/VolGroup00/LogVol00 ro
console=tty0
module /initrd-xen-2.0.img

Add "nousb"
module /vmlinuz-2.6.11-xen0 root=/dev/VolGroup00/LogVol00 ro console=tty0 nousb
and the problem goes away.

David

On 5/27/05, Ian Pratt <m+Ian.Pratt@cl.cam.ac.uk> wrote:
>
> > After a few day of off and on testing it would appear that
> > adding "nousb" to the 2.6 kernel boot options in the grub
> > config fixes this problem. I have tested with the last few
> > days of unstable builds without a hang. I have no idea why
> > this works but, so far it does. I have not had a chance to
> > test much with 2.0.6 so I can't say for sure if the same
> > holds true there.
>
> Interesting. This might turn out just to be a differnce in kernel config
> between the xen and native kernels you've tried. It might be interesting
> to compile up a stock 2.6.11.10 native kernel with a config as close as
> possible to the xen0 one, and see if the same problem is exhibited.
>
> Also, if there are any USB options in the BIOS (e.g. legacy support) it
> might be interesting to know if they have any effect.
>
> It would be particularly interesting to know what the unstable tree does
> on these systems, as the code is quite different.
>
> Best,
> Ian
>

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David H wrote:
>>It would be particularly interesting to know what the unstable tree does
>>on these systems, as the code is quite different.
>
>
> I may not have been clear; I have been testing with "unstable". If I
> build unstable with the default configuration and boot dom0 with the
> following grub entry I can make dom0 hang using a number of IO
> intensive commands. Tar, cp, mkfs, all can cause the problem and
> using scp to copy a large file to another machine will hang the domain
> in no time. Xen still responds on the serial console.
>
> title Xen 2.0.6 / XenLinux 2.6.11
> root (hd0,0)
> kernel /xen.gz dom0_mem=131072 console=com1 watchdog com1=115200,8n1
> module /vmlinuz-2.6.11-xen0 root=/dev/VolGroup00/LogVol00 ro
> console=tty0
> module /initrd-xen-2.0.img
>
> Add "nousb"
> module /vmlinuz-2.6.11-xen0 root=/dev/VolGroup00/LogVol00 ro console=tty0 nousb
> and the problem goes away.
>

This corresponds with my experience. I had the same type of problem and
got around it by disabling all USB in the xen-0 kernel config. This was
also on a dell box, but an SC1600 rather than an 1850.

--

-Barry Flanagan

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I am using a SuperMicro server with the same Intel E7520 "Lindenhurst"
chipset as the dell 1850. It looks like the 1600SC has a ServerWorksR
GC-SL chipset. Both have onboard intel NICs(82540/82544), they may
share other componets.

David

On 5/27/05, Barry Flanagan <barryf-lists@flanagan.ie> wrote:
> David H wrote:
> >>It would be particularly interesting to know what the unstable tree does
> >>on these systems, as the code is quite different.
> >
> >
> > I may not have been clear; I have been testing with "unstable". If I
> > build unstable with the default configuration and boot dom0 with the
> > following grub entry I can make dom0 hang using a number of IO
> > intensive commands. Tar, cp, mkfs, all can cause the problem and
> > using scp to copy a large file to another machine will hang the domain
> > in no time. Xen still responds on the serial console.
> >
> > title Xen 2.0.6 / XenLinux 2.6.11
> > root (hd0,0)
> > kernel /xen.gz dom0_mem=131072 console=com1 watchdog com1=115200,8n1
> > module /vmlinuz-2.6.11-xen0 root=/dev/VolGroup00/LogVol00 ro
> > console=tty0
> > module /initrd-xen-2.0.img
> >
> > Add "nousb"
> > module /vmlinuz-2.6.11-xen0 root=/dev/VolGroup00/LogVol00 ro console=tty0 nousb
> > and the problem goes away.
> >
>
> This corresponds with my experience. I had the same type of problem and
> got around it by disabling all USB in the xen-0 kernel config. This was
> also on a dell box, but an SC1600 rather than an 1850.
>
> --
>
> -Barry Flanagan
>
> _______________________________________________
> Xen-users mailing list
> Xen-users@lists.xensource.com
> http://lists.xensource.com/xen-users
>

_______________________________________________
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Xen-users@lists.xensource.com
http://lists.xensource.com/xen-users

> I am using a SuperMicro server with the same Intel E7520 "Lindenhurst"
> chipset as the dell 1850. It looks like the 1600SC has a
> ServerWorksR GC-SL chipset. Both have onboard intel
> NICs(82540/82544), they may share other componets.

This is useful information, thanks. Please could we have a 'roll call'
of the motherboard chipsets of anyone that's seeing this problem. Do you
have any usb devices plugged in to the machine? Also, what's the usb
controller?

Is there any differece in the boot messages between xen-unstable and a
similarly configured native linux kernel booting on these systems?

Thanks,
Ian


> David
>
> On 5/27/05, Barry Flanagan <barryf-lists@flanagan.ie> wrote:
> > David H wrote:
> > >>It would be particularly interesting to know what the
> unstable tree
> > >>does on these systems, as the code is quite different.
> > >
> > >
> > > I may not have been clear; I have been testing with
> "unstable". If
> > > I build unstable with the default configuration and boot
> dom0 with
> > > the following grub entry I can make dom0 hang using a
> number of IO
> > > intensive commands. Tar, cp, mkfs, all can cause the problem and
> > > using scp to copy a large file to another machine will hang the
> > > domain in no time. Xen still responds on the serial console.
> > >
> > > title Xen 2.0.6 / XenLinux 2.6.11
> > > root (hd0,0)
> > > kernel /xen.gz dom0_mem=131072 console=com1
> watchdog com1=115200,8n1
> > > module /vmlinuz-2.6.11-xen0
> root=/dev/VolGroup00/LogVol00 ro
> > > console=tty0
> > > module /initrd-xen-2.0.img
> > >
> > > Add "nousb"
> > > module /vmlinuz-2.6.11-xen0 root=/dev/VolGroup00/LogVol00 ro
> > > console=tty0 nousb and the problem goes away.
> > >
> >
> > This corresponds with my experience. I had the same type of problem
> > and got around it by disabling all USB in the xen-0 kernel config.
> > This was also on a dell box, but an SC1600 rather than an 1850.
> >
> > --
> >
> > -Barry Flanagan
> >
> > _______________________________________________
> > Xen-users mailing list
> > Xen-users@lists.xensource.com
> > http://lists.xensource.com/xen-users
> >
>
> _______________________________________________
> Xen-users mailing list
> Xen-users@lists.xensource.com
> http://lists.xensource.com/xen-users
>

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