linux-kernel - Re: [PATCH] sched: Optimize branch hint in context

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Message-Id: <200911301025.36133.borntraeger@de.ibm.com>
Date:	Mon, 30 Nov 2009 10:25:36 +0100
From:	Christian Borntraeger <borntraeger@...ibm.com>
To:	Avi Kivity <avi@...hat.com>
Cc:	Peter Zijlstra <peterz@...radead.org>,
	Tim Blechmann <tim@...ngt.org>, linux-kernel@...r.kernel.org,
	Ingo Molnar <mingo@...e.hu>,
	Thomas Gleixner <tglx@...utronix.de>
Subject: Re: [PATCH] sched: Optimize branch hint in context_switch()

Am Sonntag 29 November 2009 16:25:43 schrieb Avi Kivity:
> These should be documented then to avoid patches removing them:
> 
>       #define slowpath(x) unlikely(x)
> 
>       if (slowpath(condition))
>             expensive_operation();

Neat. If we also modify the likelyhood tracer to __not__ check the
slowpath annotation by default this really looks like a good idea.

Christian
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