Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id ; Wed, 24 Jul 2002 07:45:34 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id ; Wed, 24 Jul 2002 07:45:34 -0400 Received: from mx2.elte.hu ([157.181.151.9]:3973 "HELO mx2.elte.hu") by vger.kernel.org with SMTP id ; Wed, 24 Jul 2002 07:45:33 -0400 Date: Wed, 24 Jul 2002 13:47:41 +0200 (CEST) From: Ingo Molnar Reply-To: Ingo Molnar To: linux-kernel@vger.kernel.org Cc: Linus Torvalds Subject: [patch] irqlock patch 2.5.27-H4 Message-ID: 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 Content-Length: 2932 Lines: 102 the latest irqlock patch can be found at: http://redhat.com/~mingo/remove-irqlock-patches/remove-irqlock-2.5.27-H4 Changes in -H4: - fix the cli()/sti() hack in ide/main.c, per Marcin Dalecki's suggestion. [this leaves the tty layer as the only remaining subsystem that still has cli()/sti() related hacks.] Changes in -H3: - init thread needs to have preempt_count of 1 until sched_init(). (William Lee Irwin III) - clean up the irq-mask macros. (Linus) - add barrier() to irq_enter() and irq_exit(). (based on Oleg Nesterov's comment.) - move the irqs-off check into preempt_schedule() and remove CONFIG_DEBUG_IRQ_SCHEDULE. Changes in -G5: - remove spin_unlock_no_resched() and comment the affected places more agressively. Changes in -G3: - slab.c needs to spin_unlock_no_resched(), instead of spin_unlock(). (It also has to check for preemption in the right spot.) This should fix the memory corruption. - irq_exit() needs to run softirqs if interrupts not active - in the previous patch it ran them when preempt_count() was 0, which is incorrect. - spinlock macros are updated to enable preemption after enabling interrupts. Besides avoiding false positive warnings, this also - fork.c has to call scheduler_tick() with preemption disabled - otherwise scheduler_tick()'s spin_unlock can preempt! - irqs_disabled() macro introduced. - [ all other local_irq_enable() or sti instances conditional on CONFIG_DEBUG_IRQ_SCHEDULE are to fix false positive warnings. ] Changes in -G0: - fix buggy in_softirq(). Fortunately the bug made the test broader, which didnt result in algorithmical breakage, just suboptimal performance. - move do_softirq() processing into irq_exit() => this also fixes the softirq processing bugs present in apic.c IRQ handlers that did not test for softirqs after irq_exit(). - simplify local_bh_enable(). Changes in -F9: - replace all instances of: local_save_flags(flags); local_irq_disable(); with the shorter form of: local_irq_save(flags); about 30 files are affected by this change. Changes in -F8: - preempt/hardirq/softirq count separation, cleanups. - skbuff.c fix. - use irq_count() in scheduler_tick() Changes in -F3: - the entry.S cleanups/speedups by Oleg Nesterov. - a rather critical synchronize_irq() bugfix: if a driver frees an interrupt that is still being probed then synchronize_irq() locks up. This bug has caused a spurious boot-lockup on one of my testsystems, ifconfig would lock up trying to close eth0. - remove duplicate definitions from asm-i386/system.h, this fixes compiler warnings. 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/