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xen-devel
[Xen-devel] Re: [PATCH 00/14] PV ticket locks without expanding spinlock
To: |
Jeremy Fitzhardinge <jeremy@xxxxxxxx> |
Subject: |
[Xen-devel] Re: [PATCH 00/14] PV ticket locks without expanding spinlock |
From: |
Srivatsa Vaddagiri <vatsa@xxxxxxxxxxxxxxxxxx> |
Date: |
Wed, 19 Jan 2011 22:14:33 +0530 |
Cc: |
Xen-devel <xen-devel@xxxxxxxxxxxxxxxxxxx>, Mathieu Desnoyers <mathieu.desnoyers@xxxxxxxxxx>, Nick Piggin <npiggin@xxxxxxxxx>, kvm@xxxxxxxxxxxxxxx, Peter Zijlstra <peterz@xxxxxxxxxxxxx>, Linux Kernel Mailing List <linux-kernel@xxxxxxxxxxxxxxx>, Jan Beulich <JBeulich@xxxxxxxxxx>, Eric Dumazet <dada1@xxxxxxxxxxxxx>, Jeremy Fitzhardinge <jeremy.fitzhardinge@xxxxxxxxxx>, suzuki@xxxxxxxxxx, Avi Kivity <avi@xxxxxxxxxx>, "H. Peter Anvin" <hpa@xxxxxxxxx>, Américo Wang <xiyou.wangcong@xxxxxxxxx>, Linux Virtualization <virtualization@xxxxxxxxxxxxxxxxxxxxxxxxxx> |
Delivery-date: |
Wed, 19 Jan 2011 09:01:16 -0800 |
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www-data@xxxxxxxxxxxxxxxxxxx |
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<cover.1289940821.git.jeremy.fitzhardinge@xxxxxxxxxx> |
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Mutt/1.5.20 (2009-06-14) |
On Tue, Nov 16, 2010 at 01:08:31PM -0800, Jeremy Fitzhardinge wrote:
> From: Jeremy Fitzhardinge <jeremy.fitzhardinge@xxxxxxxxxx>
>
> Hi all,
>
> This is a revised version of the pvticket lock series.
The 3-patch series to follow this email extends KVM-hypervisor and Linux guest
running on KVM-hypervisor to support pv-ticket spinlocks.
Two hypercalls are being introduced in KVM hypervisor, one that allows a
vcpu (spinning on a lock) to block and another that allows a vcpu to kick
another out of blocking state.
Patches are against 2.6.37 mainline kernel. I also don't yet have numbers
at this time to show benefit of pv-ticketlocks - I would think the benefit
should be similar across hypervisors (Xen and KVM in this case).
- vatsa
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