linux-kernel - Re: [RFC PATCH 2/3] sched: add yield

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Message-ID: <4CF90341.4020101@redhat.com>
Date:	Fri, 03 Dec 2010 09:48:33 -0500
From:	Rik van Riel <riel@...hat.com>
To:	Mike Galbraith <efault@....de>
CC:	vatsa@...ux.vnet.ibm.com, kvm@...r.kernel.org,
	linux-kernel@...r.kernel.org, Avi Kiviti <avi@...hat.com>,
	Peter Zijlstra <a.p.zijlstra@...llo.nl>,
	Ingo Molnar <mingo@...e.hu>,
	Anthony Liguori <aliguori@...ux.vnet.ibm.com>
Subject: Re: [RFC PATCH 2/3] sched: add yield_to function

On 12/03/2010 09:45 AM, Mike Galbraith wrote:

> I'll have to go back and re-read that.  Off the top of my head, I see no
> way it could matter which container the numbers live in as long as they
> keep advancing, and stay in the same runqueue.  (hm, task weights would
> have to be the same too or scaled. dangerous business, tinkering with
> vruntimes)

They're not necessarily in the same runqueue, the
VCPU that is given time might be on another CPU
than the one that was spinning on a lock.

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