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

  • To: Ian Jackson <Ian.Jackson@xxxxxxxxxxxxx>
  • From: Mark Johnson <johnson.nh@xxxxxxxxx>
  • Date: Fri, 23 Oct 2009 11:10:10 -0400
  • Cc: xen-devel@xxxxxxxxxxxxxxxxxxx
  • Delivery-date: Fri, 23 Oct 2009 08:10:36 -0700
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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

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?


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