From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S262778AbVAKBt6 (ORCPT ); Mon, 10 Jan 2005 20:49:58 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S262777AbVAKBt6 (ORCPT ); Mon, 10 Jan 2005 20:49:58 -0500 Received: from smtp-send.myrealbox.com ([192.108.102.143]:62690 "EHLO smtp-send.myrealbox.com") by vger.kernel.org with ESMTP id S262778AbVAKBtV (ORCPT ); Mon, 10 Jan 2005 20:49:21 -0500 Date: Mon, 10 Jan 2005 17:48:57 -0800 (PST) From: walt To: linux-kernel@vger.kernel.org Subject: Preemptible Big Kernel Lock? Message-ID: <20050110172910.F49234@x9.ybpnyarg> Organization: none MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org I've been running the P-BKL all day and I've been very happy with it so far. I've found the machine to be very responsive and smooth during compilation of large programs, playback of audio/ video, all the usual stuff I do on my desktop machine. The problem is: the same machine was also great two days ago, before the preemptible BKL -- the best it's been for years. I can't tell the difference, and I had no complaints even before this update. Two questions: Would I expect to see a difference on a uni-processor machine? (That's all I have.) What kind of testing could I do to demonstrate the difference?