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[Xen-devel] Re: Xen spinlock questions

To: Jan Beulich <jbeulich@xxxxxxxxxx>, Jeremy Fitzhardinge <jeremy@xxxxxxxx>
Subject: [Xen-devel] Re: Xen spinlock questions
From: Keir Fraser <keir.fraser@xxxxxxxxxxxxx>
Date: Tue, 05 Aug 2008 08:33:34 +0100
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On 5/8/08 07:32, "Jan Beulich" <jbeulich@xxxxxxxxxx> wrote:

> one thing we'd be in even more need for here than
> old-style spin locks had been would be a directed yield (sub-)hypercall.
> Has that ever been considered to become a schedop?

It has. Someone will need to implement it and show a convincing performance
win with it with a real benchmark.

 -- Keir

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