Re: [Xen-devel] [PATCH] gnttab: lock the left grant table earlier in __gnttab_unmap_common()

["Jan Beulich" <JBeulich@xxxxxxxx>]

>>> On 11.11.13 at 15:52, Anthony Liguori <anthony@xxxxxxxxxxxxx> wrote:
> I agree, it's not at all practical and extremely unlikely to happen in
> practice.  That's why I qualified the comment with "in theory at
> least".

Extremely unlikely still means not impossible. And hence necessary
to be fixed. Yet my question stands - can this really happen with a
well behaved guest? As said, I think we're fine with a guest issuing
racing calls getting what it deserves, so long as the hypervisor or
other guests aren't affected.

Jan


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