linux-kernel - Re: x86: disable preemption in delay

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Message-ID: <20071116083627.GA18225@elte.hu>
Date:	Fri, 16 Nov 2007 09:36:27 +0100
From:	Ingo Molnar <mingo@...e.hu>
To:	Avi Kivity <avi@...ranet.com>
Cc:	Arjan van de Ven <arjan@...radead.org>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	akpm@...ux-foundation.org
Subject: Re: x86: disable preemption in delay_tsc()


* Avi Kivity <avi@...ranet.com> wrote:

> You can use preemption notifiers to get a callback when you are 
> preempted.  Not sure what you'd to with that callback, though.

but that should not be needed in this case. Why doesnt the TSC using 
delay loop simply poll the CPU it is on and fix up the TSC?

	Ingo
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