Re: 2.6.28 domU panics in blk_invoke_request_fn()

["Christopher S. Aker" <caker@theshore.net>]

Jeremy Fitzhardinge wrote:
> Christopher S. Aker wrote:
>> Below are two similar panics we've captured thus far with some light 
>> testing of 2.6.28 domUs across our Xen cluster.  The kernel binary and 
>> associated files can be found here:
> 
> How frequently does this occur?
> 
> Did it just started appearing on 2.6.28, but .27.x is OK?  Does it 
> happen often enough that you could practically bisect?

This is new in 2.6.28.  So far it's occurring randomly so bisecting 
isn't an option.

> Could you compile the kernel with CONFIG_BUG_VERBOSE enabled so that it 
> at prints some source/line info?  The location of the BUG isn't obvious.

I've compiled in CONFIG_DEBUG_BUGVERBOSE and redeployed the kernels. 
I'll post to our community forums asking for wider testing.

> What's your dom0?

3.2.1 (+/- a few changesets), 64 bit hypervisor, with dom0 2.6.18.8 PAE 
  from xenbits at changeset number 622 and the other host's dom0 at 524.

-Chris