Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751208AbVL3IAw (ORCPT ); Fri, 30 Dec 2005 03:00:52 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1751209AbVL3IAw (ORCPT ); Fri, 30 Dec 2005 03:00:52 -0500 Received: from mx3.mail.elte.hu ([157.181.1.138]:40838 "EHLO mx3.mail.elte.hu") by vger.kernel.org with ESMTP id S1751208AbVL3IAv (ORCPT ); Fri, 30 Dec 2005 03:00:51 -0500 Date: Fri, 30 Dec 2005 09:00:32 +0100 From: Ingo Molnar To: Lee Revell Cc: Dave Jones , Hugh Dickins , linux-kernel , Linus Torvalds Subject: Re: [patch] latency tracer, 2.6.15-rc7 Message-ID: <20051230080032.GA26152@elte.hu> References: <1135726300.22744.25.camel@mindpipe> <1135814419.7680.13.camel@mindpipe> <20051229082217.GA23052@elte.hu> <20051229100233.GA12056@redhat.com> <20051229101736.GA2560@elte.hu> <1135887072.6804.9.camel@mindpipe> <1135887966.6804.11.camel@mindpipe> <20051229202848.GC29546@elte.hu> <1135908980.4568.10.camel@mindpipe> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <1135908980.4568.10.camel@mindpipe> User-Agent: Mutt/1.4.2.1i X-ELTE-SpamScore: 0.0 X-ELTE-SpamLevel: X-ELTE-SpamCheck: no X-ELTE-SpamVersion: ELTE 2.0 X-ELTE-SpamCheck-Details: score=0.0 required=5.9 tests=AWL autolearn=no SpamAssassin version=3.0.3 0.0 AWL AWL: From: address is in the auto white-list X-ELTE-VirusStatus: clean Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 707 Lines: 20 * Lee Revell wrote: > It seems that debug_smp_processor_id is being called a lot, even > though I have a UP config, which I didn't see with the -rt kernel: do you have CONFIG_DEBUG_PREEMPT enabled? (if yes then disable it) > Was this optimized out on UP before? no, because smp_processor_id() debugging is useful on UP too: it checks whether smp_processor_id() is every called with preemption enabled, and reports such bugs. Ingo - 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/