Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754626AbZKMIYd (ORCPT ); Fri, 13 Nov 2009 03:24:33 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1754512AbZKMIY2 (ORCPT ); Fri, 13 Nov 2009 03:24:28 -0500 Received: from casper.infradead.org ([85.118.1.10]:55660 "EHLO casper.infradead.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754474AbZKMIY1 (ORCPT ); Fri, 13 Nov 2009 03:24:27 -0500 Subject: Re: [PATCH][RFC] Measuring term of acquiring spinlock From: Peter Zijlstra To: Ingo Molnar Cc: Hitoshi Mitake , tglx@linutronix.de, fweisbec@gmail.com, linux-kernel@vger.kernel.org In-Reply-To: <20091113081722.GA14009@elte.hu> References: <20091112.154353.680961628170545165.mitake@dcl.info.waseda.ac.jp> <20091112073909.GB31719@elte.hu> <20091113.132125.468378199533086916.mitake@dcl.info.waseda.ac.jp> <20091113081722.GA14009@elte.hu> Content-Type: text/plain; charset="UTF-8" Date: Fri, 13 Nov 2009 09:24:21 +0100 Message-ID: <1258100661.4039.1023.camel@laptop> Mime-Version: 1.0 X-Mailer: Evolution 2.28.1 Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 629 Lines: 15 On Fri, 2009-11-13 at 09:17 +0100, Ingo Molnar wrote: > > > Btw., i think we should rename that tracepoint category from 'lockdep' > to 'lock'. It's possible to enable them without CONFIG_PROVE_LOCKING, > and they arent high-overhead in that case. They're still in 'lockdep', and it does still require enabling all of the lock debugging code, so the overhead is far from zero. -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/