[Xen-devel] Re: [PATCH 08/13] xen/pvticketlock: disable interrupts while blocking

[Andi Kleen <andi@xxxxxxxxxxxxxx>]

On Wed, Sep 14, 2011 at 10:26:21PM +0300, Avi Kivity wrote:
> On 09/14/2011 08:28 PM, Andi Kleen wrote:
> >>  If an NMI hits in an interrupt handler, or in the "after hlt" section
> >>  before the write-to-last-nmi-rip, then we'll see that %rip has changed.
> >>  If it hits after the write-to-last-nmi-rip instruction (or in the hlt
> >>  itself), then we'll also see that %rip has changed, due to the effect of
> >>  that instruction.
> >
> >It won't handle multiple NMIs in halt. I assume that's reasonable common.
> >
> 
> Why not?

They all have the same original RIPs and there is no way to distingush
them.

-Andi

-- 
ak@xxxxxxxxxxxxxxx -- Speaking for myself only.

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