From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S266626AbUHOLzX (ORCPT ); Sun, 15 Aug 2004 07:55:23 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S266622AbUHOLzX (ORCPT ); Sun, 15 Aug 2004 07:55:23 -0400 Received: from mx2.elte.hu ([157.181.151.9]:7109 "EHLO mx2.elte.hu") by vger.kernel.org with ESMTP id S266626AbUHOLzS (ORCPT ); Sun, 15 Aug 2004 07:55:18 -0400 Date: Sun, 15 Aug 2004 13:56:49 +0200 From: Ingo Molnar To: linux-kernel@vger.kernel.org Cc: Felipe Alfaro Solana , Florian Schmidt , Lee Revell Subject: [patch] voluntary-preempt-2.6.8.1-P0 Message-ID: <20040815115649.GA26259@elte.hu> References: <20040726204720.GA26561@elte.hu> <20040729222657.GA10449@elte.hu> <20040801193043.GA20277@elte.hu> <20040809104649.GA13299@elte.hu> <20040810132654.GA28915@elte.hu> <20040812235116.GA27838@elte.hu> <1092382825.3450.19.camel@mindpipe> <20040813104817.GI8135@elte.hu> <1092432929.3450.78.camel@mindpipe> <20040814072009.GA6535@elte.hu> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20040814072009.GA6535@elte.hu> User-Agent: Mutt/1.4.1i X-ELTE-SpamVersion: MailScanner 4.31.6-itk1 (ELTE 1.2) SpamAssassin 2.63 ClamAV 0.73 X-ELTE-VirusStatus: clean X-ELTE-SpamCheck: no X-ELTE-SpamCheck-Details: score=-4.9, required 5.9, autolearn=not spam, BAYES_00 -4.90 X-ELTE-SpamLevel: X-ELTE-SpamScore: -4 Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org i've uploaded the -P0 patch: http://redhat.com/~mingo/voluntary-preempt/voluntary-preempt-2.6.8.1-P0 those who had APIC (and USB, under SMP) problems under previous versions, are the problems still present in -P0? Changes: - make redirected softirqs and hardirqs preemptible by default. I reviewed a number of softirq users and it appears to be safe. Process-level enable/disable_bh still disables preemption, but the handlers themselves run in a preemptible way. This preemptability should fix e.g. the IDE latencies. It could also fix some of the /dev/random related latencies. - fixed a bug in hardirq redirection - we didnt re-disable interrupts - updated the IO-APIC changes - hopefully it's more robust now Ingo