From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S262477AbVAKHrB (ORCPT ); Tue, 11 Jan 2005 02:47:01 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S262492AbVAKHrA (ORCPT ); Tue, 11 Jan 2005 02:47:00 -0500 Received: from canuck.infradead.org ([205.233.218.70]:26374 "EHLO canuck.infradead.org") by vger.kernel.org with ESMTP id S262477AbVAKHqO (ORCPT ); Tue, 11 Jan 2005 02:46:14 -0500 Subject: Re: Preemptible Big Kernel Lock? From: Arjan van de Ven To: walt Cc: linux-kernel@vger.kernel.org In-Reply-To: <20050110172910.F49234@x9.ybpnyarg> References: <20050110172910.F49234@x9.ybpnyarg> Content-Type: text/plain Date: Tue, 11 Jan 2005 08:46:03 +0100 Message-Id: <1105429563.3917.5.camel@laptopd505.fenrus.org> Mime-Version: 1.0 X-Mailer: Evolution 2.0.2 (2.0.2-3) Content-Transfer-Encoding: 7bit X-Spam-Score: 4.1 (++++) X-Spam-Report: SpamAssassin version 2.63 on canuck.infradead.org summary: Content analysis details: (4.1 points, 5.0 required) pts rule name description ---- ---------------------- -------------------------------------------------- 0.3 RCVD_NUMERIC_HELO Received: contains a numeric HELO 1.1 RCVD_IN_DSBL RBL: Received via a relay in list.dsbl.org [] 2.5 RCVD_IN_DYNABLOCK RBL: Sent directly from dynamic IP address [80.57.133.107 listed in dnsbl.sorbs.net] 0.1 RCVD_IN_SORBS RBL: SORBS: sender is listed in SORBS [80.57.133.107 listed in dnsbl.sorbs.net] X-SRS-Rewrite: SMTP reverse-path rewritten from by canuck.infradead.org See http://www.infradead.org/rpr.html Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org On Mon, 2005-01-10 at 17:48 -0800, walt wrote: > Would I expect to see a difference on a uni-processor > machine? (That's all I have.) > humans in general don't notice things < 1 milisecond. The preemptable BKL and other latency fixes are (most) there to reduce the existing typical latency that is < 1 msec to something even far lower. (and the maximum which is a bit above 1 msec to below it.. but that you hardly ever trigger unless you try). So I doubt that you as human will perceive this. Professional audio applications might notice though..,. ;)