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[Xen-devel] Re: [PATCH 08/13] xen/pvticketlock: disable interrupts while blocking
- To: Don Zickus <dzickus@xxxxxxxxxx>
- From: Andi Kleen <andi@xxxxxxxxxxxxxx>
- Date: Tue, 13 Sep 2011 21:03:20 +0200
- Cc: Jeremy Fitzhardinge <jeremy@xxxxxxxx>, Marcelo Tosatti <mtosatti@xxxxxxxxxx>, Nick Piggin <npiggin@xxxxxxxxx>, KVM <kvm@xxxxxxxxxxxxxxx>, Stefano Stabellini <stefano.stabellini@xxxxxxxxxxxxx>, Peter Zijlstra <peterz@xxxxxxxxxxxxx>, the arch/x86 maintainers <x86@xxxxxxxxxx>, Linux Kernel Mailing List <linux-kernel@xxxxxxxxxxxxxxx>, Andi Kleen <andi@xxxxxxxxxxxxxx>, Avi Kivity <avi@xxxxxxxxxx>, Jeremy Fitzhardinge <jeremy.fitzhardinge@xxxxxxxxxx>, "H. Peter Anvin" <hpa@xxxxxxxxx>, Ingo Molnar <mingo@xxxxxxx>, Linus Torvalds <torvalds@xxxxxxxxxxxxxxxxxxxx>, Xen Devel <xen-devel@xxxxxxxxxxxxxxxxxxx>
- Delivery-date: Tue, 13 Sep 2011 12:05:59 -0700
- List-id: Xen developer discussion <xen-devel.lists.xensource.com>
> So I got around to implementing this and it seems to work great. The back
> to back NMIs are detected properly using the %rip and that info is passed to
> the NMI notifier. That info is used to determine if only the first
> handler to report 'handled' is executed or _all_ the handlers are
> executed.
>
> I think all the 'unknown' NMIs I generated with various perf runs have
> disappeared. I'll post a new version of my nmi notifier rewrite soon.
This will fail when the system is idle.
-Andi
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