[PATCH], issue EOI to APIC prior to calling crash_kexec in die_nmi path

[Neil Horman]

On Wed, Feb 06, 2008 at 12:21:30PM -0800, H. Peter Anvin wrote:
> Neil Horman wrote:
> >Can an APIC accept an NMI while already handling an NMI?  I didn't think 
> >they
> >would interrupt one another, but rather, pend until such time as the 
> >previous
> >NMI was cleared
> 
> The CPU certainly won't (there is a hidden flag that's cleared on IRET 
> which disables NMI; it's possible to re-enable NMI by executing a dummy 
> IRET inside the NMI handler.)
> 
> 	-hpa

So that would be another solution I would expect.  Would you rather I
investigate that, or is the proposed solution more reasonable?

Neil


-- 
/***************************************************
 *Neil Horman
 *Software Engineer
 *Red Hat, Inc.
 *nhorman at redhat.com
 *gpg keyid: 1024D / 0x92A74FA1
 *http://pgp.mit.edu
 ***************************************************/