Re: [Xen-devel] DomU crashing on x86

[Nivedita Singhvi <niv@xxxxxxxxxx>]

David F Barrera wrote:
> We are seeing a problem in xen-unstable where DomU crashes immediately
> after booting on some x86 boxes. In my case, it is happening on a couple
> of machines that have SCSI drives and where DomU is a SLES 9
> installation. Here's some data on my setup:
>
>                 Dom0            DomU            Dom U Crash?    SCSI
>
> Machine A       SLES 9          SLES 9          Yes             Yes
> Machine B       SLES 9          RHEL 4          No              Yes
> Machine C       RHEL 4          SLES 9          Yes             Yes
> Machine D       FC3       SLES 9 and Debian     No              No
>                                                 
> The only thing I see in common in the machines that fail is the SCSI
> drives.  Machines B and C are identical; the others are different
> models.
Dave, what are your boot options?

thanks,
Nivedita

> This is the Oops info that I am seeing (no other info is displayed):
>
> Oops:   0002 [#1]
> PREEMPT SMP modules linked in:
> CPU:    0
> EIP:    0061:[<00244ec0>]       Not tainted VLI
>
>
> David Wolinsky (david_wolinsky@xxxxxxxx) has also reported seeing the
> problem:
>
> ------- Additional Comments From david_wolinsky@xxxxxxxx  2005-07-13
> 21:26 -------
> I put together a testing suite to figure out the problemâ and it seems
> related 
> to two parts of my machine.
> A)  Fedora Core 3
> B)  SATA drive (as you are probably aware these use the same scsi
> driver)
>
> To test A out, I installed Debian (known for its stability, etc)â And
> ran with 
> SATA in SATA mode and in IDE emulation mode (cominbation mode as listed
> in the 
> bios)â both tests passed (not concrete, I only ran it as long as I had
> known 
> the test of Fedora Core to lastâ I'll run it over night for 100%).  
>
> To test B out, I set my SATA mode into IDE emulation mode and ran it in
> FC3, 
> this time it crashed the DomU and not Dom0.
> My conclusion is... an issue between the SCSI driver, Xen hypervisor,
> and the 
> memory driver
> -------------------end of David Wolinsky's comments ---------------
>
> Has anyone else observed this problem?  I believe this is a serious
> problem that requires some attention.

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