linux-kernel - Re: [PATCH] clockevents: Per cpu tick skew boot option

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Message-ID: <1336309806.7351.19.camel@marge.simpson.net>
Date:	Sun, 06 May 2012 15:10:06 +0200
From:	Mike Galbraith <efault@....de>
To:	LKML <linux-kernel@...r.kernel.org>
Cc:	Thomas Gleixner <tglx@...utronix.de>
Subject: Re: [PATCH] clockevents: Per cpu tick skew boot option

On Sun, 2012-05-06 at 14:58 +0200, Mike Galbraith wrote:

> - 0209f649 rcu: limit rcu_node leaf-level fanout
>   This patch was born to combat lock contention which testing showed
>   to have been _induced by_ skew removal.  Skew the tick, contention
>   disappeared virtually completely.

P.S.  This boot option patch will complement a proposed patch by Paul
McKenney to allow boot time fanout configuration.  Between the two,
users will then be able to boot time select the tradeoff they need for
optimal performance of their systems.

-Mike


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