Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S261718AbVCSTRU (ORCPT ); Sat, 19 Mar 2005 14:17:20 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S262653AbVCSTRU (ORCPT ); Sat, 19 Mar 2005 14:17:20 -0500 Received: from mx1.elte.hu ([157.181.1.137]:29870 "EHLO mx1.elte.hu") by vger.kernel.org with ESMTP id S261718AbVCSTRL (ORCPT ); Sat, 19 Mar 2005 14:17:11 -0500 Date: Sat, 19 Mar 2005 20:16:58 +0100 From: Ingo Molnar To: linux-kernel@vger.kernel.org Cc: "Paul E. McKenney" Subject: [patch] Real-Time Preemption, -RT-2.6.12-rc1-V0.7.41-00 Message-ID: <20050319191658.GA5921@elte.hu> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline 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 Content-Length: 1646 Lines: 39 i have released the -V0.7.41-00 Real-Time Preemption patch (merged to 2.6.12-rc1), which can be downloaded from the usual place: http://redhat.com/~mingo/realtime-preempt/ the biggest change in this patch is the merge of Paul E. McKenney's preemptable RCU code. The new RCU code is active on PREEMPT_RT. While it is still quite experimental at this stage, it allowed the removal of locking cruft (mainly in the networking code), so it could solve some of the longstanding netfilter/networking deadlocks/crashes reported by a number of people. Be careful nevertheless. there are a couple of minor changes relative to Paul's latest preemptable-RCU code drop: - made the two variants two #ifdef blocks - this is sufficient for now and we'll see what the best way is in the longer run. - moved rcu_check_callbacks() from the timer IRQ to ksoftirqd. (the timer IRQ still runs in hardirq context on PREEMPT_RT.) - changed the irq-flags method to a preempt_disable()-based method, and moved the lock taking outside of the critical sections. (due to locks potentially sleeping on PREEMPT_RT). to create a -V0.7.41-00 tree from scratch, the patching order is: http://kernel.org/pub/linux/kernel/v2.6/linux-2.6.11.tar.bz2 http://kernel.org/pub/linux/kernel/v2.6/testing/patch-2.6.12-rc1.bz2 http://redhat.com/~mingo/realtime-preempt/realtime-preempt-2.6.12-rc1-V0.7.41-00 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/