Re: [Xen-devel] qemu-3.4-testing problems...

[Mark Johnson <johnson.nh@xxxxxxxxx>]

On Fri, Oct 23, 2009 at 10:35 AM, Ian Jackson <Ian.Jackson@xxxxxxxxxxxxx> wrote:
> Mark Johnson writes ("[Xen-devel] qemu-3.4-testing problems..."):
>> We have a user who's 64-bit Windows 2k8 guest consistently
>> cores qemu-dm with the latest qemu-3.4-testing.git bits.
>> I haven't been able to reproduce it with Linux (HVM), Solaris(HVM), or a
>> 64-bit Windows 2k8 guest. Not sure what's different about his guest.
>>
>> I was able to have him backout the recent changes pushed on 10/20
>> (with no other changes) and his guest no longer crashes...
>
> `10/20' presumably means 20th October.

Yes, sorry.


> Those are mostly the backports
> of block driver changes from upstream.  They're not really bisectable
> but I think we should be able to debug it.

Yes.. He's seeing it on a block (SAN) device btw.


> You're using a Linux host I take it ?  Could you please compile your
> qemu-dm with -g and unstrupped and use gdb to print sensible stack
> traces (with line numbers and so on) ?  I think I should be able to
> tell what's going on if you can get me a good backtrace ?
>
> If you're not sure how to do that I'll give detailed instructions.

Nope, Solaris. :-) I'll be able to chase it down (on vacation today
though).

My e-mail was a FYI for other folks to keep an eye out for it..
We don't (shouldn't) have any changes in these code paths.. But
it could something ifdef linux vs not specific?



MRJ

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