[Xen-devel] Re: [PATCH] Fix the RHEL4 guest hang

[Keir Fraser <Keir.Fraser@xxxxxxxxxxxx>]

On 5 May 2006, at 04:17, Kamble, Nitin A wrote:

>         The reason for the infinite loop is changeset 9699. With that
> the guest page fault was always getting overridden by the int 0xff gp
> fault coming from the IDT_VECTORING_INFO. With the attached patch if 
> VMM
> is injecting exceptions like page faults or gp faults then
> IDT_VECTORING_INFO field does not override it, and that breaks the
> vmexit infinite loop for the rhel4.
Ok, that makes sense thanks.

Is it not possible to specify that software interrupts do not cause a 
VMEXIT? That would seem to avoid the problem totally (as the original 
'int 0xff' wouldn't vmexit), but it looks like maybe it's not possible.
 -- Keir


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