Here's a vmcore, along with log files from Xen's crash dump utility.

https://drive.google.com/file/d/0Bz8b7ZiWX00AeHRhMjNvdVNLdDQ/view?usp=sharing

Let me know if we can help more.

On Fri, Apr 10, 2015 at 1:04 PM Ilya Dryomov <[email protected]> wrote:

> On Fri, Apr 10, 2015 at 8:03 PM, Shawn Edwards <[email protected]>
> wrote:
> > I took the rbd and ceph drivers out of the patched kernel above and
> merged
> > them into Xen's kernel.  Works as well as the old one; still crashes.
> But
> > now I get logs.  From the Xen logs:
> >
> > [   1128.217561]    ERR:
> > Assertion failure in rbd_img_obj_callback() at line 2363:
> >
> > rbd_assert(more ^ (which == img_request->obj_request_count));
>
> Ah, that's a long standing bug which we know wasn't properly fixed -
> a tight race in rbd completion callback.  It looks like it doesn't take
> long for you to reproduce it.  Can you try grabbing a vmcore such that
> it can be inspected with crash utility?
>
> Thanks,
>
>                 Ilya
>
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