linux-kernel - Re: [PATCH RFC] sched: add notifier for process migration

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Message-Id: <1255169528.7521.3.camel@laptop>
Date:	Sat, 10 Oct 2009 12:12:08 +0200
From:	Peter Zijlstra <peterz@...radead.org>
To:	Jeremy Fitzhardinge <jeremy@...p.org>
Cc:	Avi Kivity <avi@...hat.com>, Ingo Molnar <mingo@...hat.com>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	Thomas Gleixner <tglx@...utronix.de>,
	Andi Kleen <ak@...ux.intel.com>,
	"H. Peter Anvin" <hpa@...or.com>
Subject: Re: [PATCH RFC] sched: add notifier for process migration

On Sat, 2009-10-10 at 02:36 -0700, Jeremy Fitzhardinge wrote:
> On 10/10/09 02:24, Peter Zijlstra wrote:
> > Is that a real issue? If its not supported by the early hardware virt
> > chips, tough luck, they sucked anyway :-)
> >   
> 
> Nehalem is the first Intel chip to support it, and Xen doesn't rely on
> hardware virt support anyway.

Ah, nehalem is too limited indeed :-/

A well, look at set_task_cpu(): new_rq->nr_migrations_in++;

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