Il 13/03/2014 18:08, Radim Krčmář ha scritto:
> I agree that old code is wrong and the patch looks correct, but I only
> see how the bug may cause pending IRR to not be delivered in time,
> not how interrupt can disrupt a higher priority task.
Right. Also, on SMP guests the effect would likely
2014-03-13 15:52+0200, Gleb Natapov:
> On Wed, Mar 12, 2014 at 06:20:01PM +0100, Paolo Bonzini wrote:
> > Il 12/03/2014 11:40, Radim Krčmář ha scritto:
> > >2014-03-11 22:05-0300, Marcelo Tosatti:
> > >>On Tue, Mar 11, 2014 at 07:11:18PM +0100, Radim Krčmář wrote:
> > >>>We always disable cr8 inter
On Wed, Mar 12, 2014 at 06:20:01PM +0100, Paolo Bonzini wrote:
> Il 12/03/2014 11:40, Radim Krčmář ha scritto:
> >2014-03-11 22:05-0300, Marcelo Tosatti:
> >>On Tue, Mar 11, 2014 at 07:11:18PM +0100, Radim Krčmář wrote:
> >>>We always disable cr8 intercept in its handler, but only re-enable it
> >>
Il 12/03/2014 11:40, Radim Krčmář ha scritto:
2014-03-11 22:05-0300, Marcelo Tosatti:
On Tue, Mar 11, 2014 at 07:11:18PM +0100, Radim Krčmář wrote:
We always disable cr8 intercept in its handler, but only re-enable it
if handling KVM_REQ_EVENT, so there can be a window where we do not
intercept
On Wed, Mar 12, 2014 at 11:40:48AM +0100, Radim Krčmář wrote:
> 2014-03-11 22:05-0300, Marcelo Tosatti:
> > On Tue, Mar 11, 2014 at 07:11:18PM +0100, Radim Krčmář wrote:
> > > We always disable cr8 intercept in its handler, but only re-enable it
> > > if handling KVM_REQ_EVENT, so there can be a wi
2014-03-11 22:05-0300, Marcelo Tosatti:
> On Tue, Mar 11, 2014 at 07:11:18PM +0100, Radim Krčmář wrote:
> > We always disable cr8 intercept in its handler, but only re-enable it
> > if handling KVM_REQ_EVENT, so there can be a window where we do not
> > intercept cr8 writes, which allows an interru
On Tue, Mar 11, 2014 at 07:11:18PM +0100, Radim Krčmář wrote:
> We always disable cr8 intercept in its handler, but only re-enable it
> if handling KVM_REQ_EVENT, so there can be a window where we do not
> intercept cr8 writes, which allows an interrupt to disrupt a higher
> priority task.
>
> Fix
We always disable cr8 intercept in its handler, but only re-enable it
if handling KVM_REQ_EVENT, so there can be a window where we do not
intercept cr8 writes, which allows an interrupt to disrupt a higher
priority task.
Fix this by disabling intercepts in the same function that re-enables
them wh
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