Xen users - May 2009 - System freezes (hangs) and unexpected reboots with Xen 3.3.1 and W2k8 domU

Hi,

my Xen server basically runs stable with lots of Linux domU''s. This
changes as soon as I start a domU running Windows 2008 Server: Sometimes it
takes only minutes, sometimes it takes days until the whole server either
freezes or reboots — usually without any message on console or logs. Sometimes
I''ve got messages like "rejecting I/O to offline device" on
console that lead me to a reported bug in the megasas driver. So I updated it to
4.01.

Since then I have never seen the "rejecting I/O..." messages again but
the system still freezes or reboots shortly after creating the W2k8 HVM domU. I
have already setup syslog forwarding to a another server but there are no
helpful messages either.

Software details:

- Xen 3.3.1 (Debian 5.0/Lenny), 64 bit
- dom0: Linux kernel 2.6.26-2-xen-amd64
- domU: Windows 2008, 64 bit installation + James Harper''s GPL PV
drivers, 4 cores, 4096 megabytes memory

Hardware configuration:
- 2x Intel Xeon 5140 (dual core)
- Intel SRCSAS18E RAID controller using the megasas driver

Any ideas?

Kind regards,

Stephan



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I''ve the same problem., but I''ve never had messages like
"rejecting I/O to
offline device"...my server runs stable and the logs doesn''t show
errors...I
revise it every day

Software details:

- Xen 3.3.1 (Debian etch 40r6) 64 bit
- dom0: Linux kernel 2.6.18
- domU:

   - Windows 2008, 64 bit installation ,4 cores, + 20GB memory
   - Windows XP, 32 bit, 2 cores, 2GB memory.
   - Debian lenny: 64 bit, 3 cores, 8GB
   - Debian lenny: 64 bit, 3 cores, 12GB

Hardware details:
    Dell PowerEdge 2900 III
    2 x Quad Core Xeon X5470 (3.33GHz, 2x6MB, 1333MHz FSB, 120W TDP)
    48GB 667MHz FBD (12x4GB dual rank DIMMs)
   PERC 5/i integrated RAID Controller *using megasas* driver


Has you solved the problem?

Any ideas??

2009/5/19 Stephan Austermühle <au@hcsd.de>
> Hi,
>
> my Xen server basically runs stable with lots of Linux domU''s.
This changes
> as soon as I start a domU running Windows 2008 Server: Sometimes it takes
> only minutes, sometimes it takes days until the whole server either freezes
> or reboots — usually without any message on console or logs. Sometimes
I''ve
> got messages like "rejecting I/O to offline device" on console
that lead me
> to a reported bug in the megasas driver. So I updated it to 4.01.
>
> Since then I have never seen the "rejecting I/O..." messages
again but the
> system still freezes or reboots shortly after creating the W2k8 HVM domU. I
> have already setup syslog forwarding to a another server but there are no
> helpful messages either.
>
> Software details:
>
> - Xen 3.3.1 (Debian 5.0/Lenny), 64 bit
> - dom0: Linux kernel 2.6.26-2-xen-amd64
> - domU: Windows 2008, 64 bit installation + James Harper''s GPL PV
drivers,
> 4 cores, 4096 megabytes memory
>
> Hardware configuration:
> - 2x Intel Xeon 5140 (dual core)
> - Intel SRCSAS18E RAID controller using the megasas driver
>
> Any ideas?
>
> Kind regards,
>
> Stephan
>
>
> _______________________________________________
> Xen-users mailing list
> Xen-users@lists.xensource.com
> http://lists.xensource.com/xen-users
>

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Hi Alberto!

Alberto Asuero Arroyo schrieb:
> Has you solved the problem?
Yes, meanwhile my server is stable. I achieved that by upgrading to Xen
3.3.2-rc2 (self compiled), Debian Lenny provided Linux kernel 2.6.26 and
upgrading the megaraid_sas driver to 04.01-rc1 (I took it from 2.6.27.21 and
compiled it as a module against the Debian kernel). I do not remember the whole
story but there was a bug in the 3.x driver that caused the system to freeze or
reboot with HVM domU''s.

Kind regards,

Stephan


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Thanks Stephan

how have you installed the Linux kernel 2.6.26 and upgrading the
megaraid_sas driver to 04.01-rc1. In the latest xen release the kernel is
2.6.18. have you use any patch??

Best regards

2009/6/29 Stephan Austermühle <au@hcsd.de>
> Hi Alberto!
>
> Alberto Asuero Arroyo schrieb:
>
>  Has you solved the problem?
>>
>
> Yes, meanwhile my server is stable. I achieved that by upgrading to Xen
> 3.3.2-rc2 (self compiled), Debian Lenny provided Linux kernel 2.6.26 and
> upgrading the megaraid_sas driver to 04.01-rc1 (I took it from 2.6.27.21
and
> compiled it as a module against the Debian kernel). I do not remember the
> whole story but there was a bug in the 3.x driver that caused the system to
> freeze or reboot with HVM domU''s.
>
> Kind regards,
>
> Stephan
>

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Hi Alberto,

Alberto Asuero Arroyo schrieb:
> how have you installed the Linux kernel 2.6.26 and upgrading the
> megaraid_sas driver to 04.01-rc1. In the latest xen release the kernel is
> 2.6.18. have you use any patch??
I''m running the Debian Lenny Xen kernel, not the original XenLinux
kernel (too old).

I have just taken the megaraid_sas directory from Linux kernel 2.6.27.21 and
compiled it against an installed Lenny kernel (install kernel headers, then
change into the directory and simple run make). The remaing work is easy:
Install the new driver module as /lib/modules/$( uname -r
)/kernel/drivers/scsi/megaraid/megaraid_sas.ko, create/update your initrd, and
reboot.

Regards,

Stephan


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hi Stephan!

When you talk about the install process...

The remaing work is easy: Install the new driver module as /lib/modules/$(
uname -r )/kernel/drivers/scsi/
>
> megaraid/megaraid_sas.ko

how can I install it?? Moving megaraid_sas.ko from linux 2.6.27.1 to debian
lenny kernel??

Thanks


2009/7/10 Stephan Austermühle <au@hcsd.de>
> Hi Alberto,
>
> Alberto Asuero Arroyo schrieb:
>
>  how have you installed the Linux kernel 2.6.26 and upgrading the
>> megaraid_sas driver to 04.01-rc1. In the latest xen release the kernel
is
>> 2.6.18. have you use any patch??
>>
>
> I''m running the Debian Lenny Xen kernel, not the original XenLinux
kernel
> (too old).
>
> I have just taken the megaraid_sas directory from Linux kernel 2.6.27.21
> and compiled it against an installed Lenny kernel (install kernel headers,
> then change into the directory and simple run make). The remaing work is
> easy: Install the new driver module as /lib/modules/$( uname -r
> )/kernel/drivers/scsi/megaraid/megaraid_sas.ko, create/update your initrd,
> and reboot.
>
> Regards,
>
> Stephan
>

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