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xen-devel
[Xen-devel] Re: [PATCH 08/13] xen/pvticketlock: disable interrupts while
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To: |
Don Zickus <dzickus@xxxxxxxxxx> |
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Subject: |
[Xen-devel] Re: [PATCH 08/13] xen/pvticketlock: disable interrupts while blocking |
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From: |
Avi Kivity <avi@xxxxxxxxxx> |
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Date: |
Wed, 07 Sep 2011 20:41:48 +0300 |
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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>, Jeremy Fitzhardinge <jeremy.fitzhardinge@xxxxxxxxxx>, "H. Peter Anvin" <hpa@xxxxxxxxx>, Ingo Molnar <mingo@xxxxxxx>, Linus Torvalds <torvalds@xxxxxxxxxxxxxxxxxxxx>, Xen Devel <xen-devel@xxxxxxxxxxxxxxxxxxx> |
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Wed, 07 Sep 2011 10:44:48 -0700 |
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<20110906151408.GA7459@xxxxxxxxxx> <4E66615E.8070806@xxxxxxxx> <20110906182758.GR5795@xxxxxxxxxx> <4E66EF86.9070200@xxxxxxxxxx> <20110907134411.GV5795@xxxxxxxxxx> <4E678992.5050709@xxxxxxxxxx> <20110907155657.GX5795@xxxxxxxxxx> <4E679AF4.50209@xxxxxxxxxx> <20110907165203.GQ6838@xxxxxxxxxx> <4E67A551.4000502@xxxxxxxxxx> <20110907172117.GY5795@xxxxxxxxxx> |
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On 09/07/2011 08:21 PM, Don Zickus wrote:
>
> How about, during NMI, save %rip to a per-cpu variable. Handle just
> one cause. If, on the next NMI, we hit the same %rip, assume
> back-to-back NMI has occured and now handle all causes.
I had a similar idea a couple of months ago while debugging a continuous
flow of back-to-back NMIs from a stress-test perf application and I
couldn't get it to work. But let me try it again, because it does make
sense as an optimization.
Great, thanks.
--
I have a truly marvellous patch that fixes the bug which this
signature is too narrow to contain.
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- [Xen-devel] Re: [PATCH 08/13] xen/pvticketlock: disable interrupts while blocking, (continued)
- [Xen-devel] Re: [PATCH 08/13] xen/pvticketlock: disable interrupts while blocking, Don Zickus
- [Xen-devel] Re: [PATCH 08/13] xen/pvticketlock: disable interrupts while blocking,
Avi Kivity <=
- [Xen-devel] Re: [PATCH 08/13] xen/pvticketlock: disable interrupts while blocking, Don Zickus
- [Xen-devel] Re: [PATCH 08/13] xen/pvticketlock: disable interrupts while blocking, Andi Kleen
- [Xen-devel] Re: [PATCH 08/13] xen/pvticketlock: disable interrupts while blocking, Don Zickus
- [Xen-devel] Re: [PATCH 08/13] xen/pvticketlock: disable interrupts while blocking, Don Zickus
- [Xen-devel] Re: [PATCH 08/13] xen/pvticketlock: disable interrupts while blocking, Andi Kleen
- [Xen-devel] Re: [PATCH 08/13] xen/pvticketlock: disable interrupts while blocking, Don Zickus
- [Xen-devel] Re: [PATCH 08/13] xen/pvticketlock: disable interrupts while blocking, Andi Kleen
- [Xen-devel] Re: [PATCH 08/13] xen/pvticketlock: disable interrupts while blocking, Avi Kivity
- [Xen-devel] Re: [PATCH 08/13] xen/pvticketlock: disable interrupts while blocking, Don Zickus
- [Xen-devel] Re: [PATCH 08/13] xen/pvticketlock: disable interrupts while blocking, Andi Kleen
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