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xen-devel
[Xen-devel] Re: [PATCH 08/13] xen/pvticketlock: disable interrupts while
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To: |
Jeremy Fitzhardinge <jeremy@xxxxxxxx> |
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Subject: |
[Xen-devel] Re: [PATCH 08/13] xen/pvticketlock: disable interrupts while blocking |
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From: |
Peter Zijlstra <peterz@xxxxxxxxxxxxx> |
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Date: |
Fri, 02 Sep 2011 22:47:48 +0200 |
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Cc: |
Xen Devel <xen-devel@xxxxxxxxxxxxxxxxxxx>, Marcelo Tosatti <mtosatti@xxxxxxxxxx>, Nick Piggin <npiggin@xxxxxxxxx>, KVM <kvm@xxxxxxxxxxxxxxx>, 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>, the |
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Delivery-date: |
Fri, 02 Sep 2011 13:49:02 -0700 |
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www-data@xxxxxxxxxxxxxxxxxxx |
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<4E612EA1.20007@xxxxxxxx> |
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References: |
<cover.1314922370.git.jeremy.fitzhardinge@xxxxxxxxxx> <38bb37e15f6e5056d5238adac945bc1837a996ec.1314922370.git.jeremy.fitzhardinge@xxxxxxxxxx> <1314974826.1861.1.camel@twins> <4E612EA1.20007@xxxxxxxx> |
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Sender: |
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On Fri, 2011-09-02 at 12:29 -0700, Jeremy Fitzhardinge wrote:
>
> > I know that its generally considered bad form, but there's at least one
> > spinlock that's only taken from NMI context and thus hasn't got any
> > deadlock potential.
>
> Which one?
arch/x86/kernel/traps.c:nmi_reason_lock
It serializes NMI access to the NMI reason port across CPUs.
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- [Xen-devel] Re: [PATCH 11/13] x86/ticketlock: only do kick after doing unlock, (continued)
- [Xen-devel] [PATCH 12/13] x86/pvticketlock: make sure unlock_kick pvop call is inlined, Jeremy Fitzhardinge
- [Xen-devel] [PATCH 09/13] x86/pvticketlocks: we only need to kick if there's waiters, Jeremy Fitzhardinge
- [Xen-devel] [PATCH 05/13] x86/ticketlocks: when paravirtualizing ticket locks, increment by 2, Jeremy Fitzhardinge
- [Xen-devel] [PATCH 10/13] xen/pvticket: allow interrupts to be enabled while blocking, Jeremy Fitzhardinge
- [Xen-devel] [PATCH 08/13] xen/pvticketlock: disable interrupts while blocking, Jeremy Fitzhardinge
- [Xen-devel] Re: [PATCH 08/13] xen/pvticketlock: disable interrupts while blocking, Peter Zijlstra
- [Xen-devel] Re: [PATCH 08/13] xen/pvticketlock: disable interrupts while blocking, Jeremy Fitzhardinge
- [Xen-devel] Re: [PATCH 08/13] xen/pvticketlock: disable interrupts while blocking,
Peter Zijlstra <=
- [Xen-devel] Re: [PATCH 08/13] xen/pvticketlock: disable interrupts while blocking, Jeremy Fitzhardinge
- [Xen-devel] Re: [PATCH 08/13] xen/pvticketlock: disable interrupts while blocking, Peter Zijlstra
- [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, Stefano Stabellini
- [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, Jeremy Fitzhardinge
- [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, Jeremy Fitzhardinge
- [Xen-devel] Re: [PATCH 08/13] xen/pvticketlock: disable interrupts while blocking, Avi Kivity
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