Re: [Xen-devel] [xen-unstable test] 18426: tolerable FAIL - PUSHED

["Jan Beulich" <JBeulich@xxxxxxxx>]

>>> On 16.07.13 at 09:42, "Jan Beulich" <JBeulich@xxxxxxxx> wrote:
> But before I propose a patch to do either of these, I'd really
> like to understand which other (un)mapping it is that we race
> with here (resulting - as pointed out above - in the fault being
> at always the same virtual page frame).

So one race is with domain destruction calling vunmap(), but that
still can't explain all of the crashes the logs hold: There is at least
one case where it's the very first guest that causes the crash.
Hence I'm still unclear about what else is going wrong (and I'm
not seeing runtime vunmap()-s other than during domain
destruction). Hence I guess I'll propose a patch that switches
vunmap() to use map_pages_to_xen(..., 0) on x86 and at the
same time adds temporary logging to vmap() and vunmap().
Unless anyone has any better idea of course.

Jan


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