Re: [Xen-devel] kernel panic

[Ian Pratt <Ian.Pratt@xxxxxxxxxxxx>]

> > Yes, there seems to be a nasty bug that possibly involves writable
> > page tables (noone has reported the bug with writable page tables
> > disabled in the kernel configuration).
> 
> I'm building now with wpt disabled. I'll let you know how it goes. In
> addition, trying to clean up the crashed domain with 'xm destroy <name>'
> caused dom0 and therefore the whole machine to reboot.

Have you got a serial line on the machine? If so, if you have a
debug build we should be getting interesting debugging.

Also, before trying to destroy the domain, hit ctrl-A three times
and then 'q' and 'o'.

This will do an audit of all the domain's remaining memory, and
might give us a clue as to what is broken.

Even more informative might be to add a call to audit_domains()
in the "Bad page free for domain" error path in xen/common/dom_mem_ops.c

What are you doing in the domains that's causing this bug? We've
tried to reproduce but can't so far.

Thanks,
Ian


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