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From: Paul Mackerras <paulus@samba.org>
To: Ingo Molnar <mingo@elte.hu>
Cc: Mathieu Desnoyers <compudj@krystal.dyndns.org>,
	Lai Jiangshan <laijs@cn.fujitsu.com>,
	Linux Kernel Mailing List <linux-kernel@vger.kernel.org>
Subject: Re: [PATCH tip/tracing/markers] new probes manager
Date: Tue, 28 Oct 2008 10:13:28 +1100	[thread overview]
Message-ID: <18694.19224.210495.372922@cargo.ozlabs.ibm.com> (raw)
In-Reply-To: <20081027182655.GA11494@elte.hu>

Ingo Molnar writes:

> yes, the statement that rmb() is very expensive looks dubious. It is 
> absolutely cheap everywhere.

On x86, maybe.  On powerpc it's as expensive as mb().

Paul.

  reply	other threads:[~2008-10-27 23:13 UTC|newest]

Thread overview: 6+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2008-10-23  2:47 Lai Jiangshan
2008-10-27 15:58 ` Mathieu Desnoyers
2008-10-27 16:30   ` Mathieu Desnoyers
2008-10-27 18:26     ` Ingo Molnar
2008-10-27 23:13       ` Paul Mackerras [this message]
2008-10-28  1:17       ` Lai Jiangshan

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