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xen-devel
[Xen-devel] Re: [PATCH RFC 0/4] Paravirtual spinlocks
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To: |
Rusty Russell <rusty@xxxxxxxxxxxxxxx> |
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Subject: |
[Xen-devel] Re: [PATCH RFC 0/4] Paravirtual spinlocks |
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From: |
Nick Piggin <nickpiggin@xxxxxxxxxxxx> |
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Date: |
Tue, 8 Jul 2008 14:51:42 +1000 |
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Cc: |
Jens Axboe <axboe@xxxxxxxxx>, Jeremy Fitzhardinge <jeremy@xxxxxxxx>, Xen devel <xen-devel@xxxxxxxxxxxxxxxxxxx>, Peter Zijlstra <a.p.zijlstra@xxxxxxxxx>, Christoph Lameter <clameter@xxxxxxxxxxxxxxxxxxxx>, Petr Tesarik <ptesarik@xxxxxxx>, LKML <linux-kernel@xxxxxxxxxxxxxxx>, virtualization@xxxxxxxxxxxxxxxxxxxxxxxxxx, Thomas Friebel <thomas.friebel@xxxxxxx>, Ingo Molnar <mingo@xxxxxxx> |
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Mon, 07 Jul 2008 21:52:26 -0700 |
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On Tuesday 08 July 2008 10:29, Rusty Russell wrote:
> On Tuesday 08 July 2008 05:07:49 Jeremy Fitzhardinge wrote:
> > At the most recent Xen Summit, Thomas Friebel presented a paper
> > ("Preventing Guests from Spinning Around",
> > http://xen.org/files/xensummitboston08/LHP.pdf) investigating the
> > interactions between spinlocks and virtual machines. Specifically, he
> > looked at what happens when a lock-holding VCPU gets involuntarily
> > preempted.
>
> I find it interesting that gang scheduling the guest was not suggested as
> an obvious solution.
>
> Anyway, concept looks fine; lguest's solution is more elegant of course :)
What's lguest's solution?
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