Re: [Xen-devel] new(?) big ugly crash

[Derek Glidden <dglidden@xxxxxxxxxxxxxxx>]

On Jul 26, 2004, at 8:10 AM, Keir Fraser wrote:

> Can you easily reproduce this? All the subsequent oopses are because
> our panic() when the mmu updates fail ought to be a BUG() [BUG doesn't
> try to sync disks; panic does] ---- it's nothing to do with XFS.
It popped up when all I had done was start xend and a couple domains, 
realize I wanted to change something, shut down the domains and tried 
to stop xend, so I thought it would be easy, but I haven't been able to 
reproduce it at all.  In fact, the machine has been running all weekend 
doing "serious" work (compiling and such) in four VMs without a hiccup.
> If you do a debug build of Xen then we may get useful info out as to
> why the mmu_update is failing.
hopefully it's not a heisenbug that goes away when I turn on better 
debugging info...  It looks like James is hitting the same "MMU update" 
thing though, so maybe I should go back to the "ping and md5sum" test 
and see if I can induce it that way.
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