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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 21:58:38 +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 13:03:59 -0700
- List-id: Xen developer discussion <xen-devel.lists.xensource.com>
> Or are you saying an NMI in an idle system will have the same %rip thus
> falsely detecting a back-to-back NMI?
Yup.
Another problem is very long running instructions, like WBINVD and some others.
If there's a high frequency NMI it may well hit multiple times in a single
instance.
-Andi
--
ak@xxxxxxxxxxxxxxx -- Speaking for myself only.
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