From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S267765AbUHJV7V (ORCPT ); Tue, 10 Aug 2004 17:59:21 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S267766AbUHJV7V (ORCPT ); Tue, 10 Aug 2004 17:59:21 -0400 Received: from mustang.oldcity.dca.net ([216.158.38.3]:22745 "HELO mustang.oldcity.dca.net") by vger.kernel.org with SMTP id S267765AbUHJV7J (ORCPT ); Tue, 10 Aug 2004 17:59:09 -0400 Subject: Re: [patch] voluntary-preempt-2.6.8-rc3-O5 From: Lee Revell To: Ingo Molnar Cc: linux-kernel , Felipe Alfaro Solana , Florian Schmidt In-Reply-To: <20040810132654.GA28915@elte.hu> References: <1090795742.719.4.camel@mindpipe> <20040726082330.GA22764@elte.hu> <1090830574.6936.96.camel@mindpipe> <20040726083537.GA24948@elte.hu> <1090832436.6936.105.camel@mindpipe> <20040726124059.GA14005@elte.hu> <20040726204720.GA26561@elte.hu> <20040729222657.GA10449@elte.hu> <20040801193043.GA20277@elte.hu> <20040809104649.GA13299@elte.hu> <20040810132654.GA28915@elte.hu> Content-Type: text/plain Message-Id: <1092175165.5061.10.camel@mindpipe> Mime-Version: 1.0 X-Mailer: Ximian Evolution 1.4.6 Date: Tue, 10 Aug 2004 17:59:27 -0400 Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org On Tue, 2004-08-10 at 09:26, Ingo Molnar wrote: > i've uploaded the latest version of the voluntary-preempt patch: > > http://redhat.com/~mingo/voluntary-preempt/voluntary-preempt-2.6.8-rc3-O5 > > -O5 fixes the APIC lockup issues. The bug was primarily caused by PCI > POST delays causing IRQ storms of level-triggered IRQ sources that were > hardirq-redirected. Also found some bugs in delayed-IRQ masking and > unmasking. SMP should thus work again too. > Correction, mlockall-test *does* cause xruns. Here is the trace: (mlockall-test/12466): 10303us non-preemptible critical section violated 400 us preempt threshold starting at get_user_pages+0xa5/0x3d0 and ending at get_user_pages+0x2e7/0x3d0 [] dump_stack+0x17/0x20 [] sub_preempt_count+0x4b/0x60 [] get_user_pages+0x2e7/0x3d0 [] make_pages_present+0x68/0x90 [] mlock_fixup+0x8d/0xb0 [] do_mlockall+0x70/0x90 [] sys_mlockall+0x99/0xa0 [] syscall_call+0x7/0xb ALSA /home/rlrevell/cvs/alsa/alsa-driver/alsa-kernel/core/pcm_lib.c:139: XRUN: pcmC0D2c [] dump_stack+0x17/0x20 [] snd_pcm_period_elapsed+0x28b/0x3f0 [snd_pcm] [] snd_emu10k1_interrupt+0xd1/0x3c0 [snd_emu10k1] [] generic_handle_IRQ_event+0x33/0x60 [] do_IRQ+0xb7/0x190 [] common_interrupt+0x18/0x20 [] __touch_preempt_timing+0x8/0x20 [] get_user_pages+0x2f4/0x3d0 [] make_pages_present+0x68/0x90 [] mlock_fixup+0x8d/0xb0 [] do_mlockall+0x70/0x90 [] sys_mlockall+0x99/0xa0 [] syscall_call+0x7/0xb Here is a different one: ALSA /home/rlrevell/cvs/alsa/alsa-driver/alsa-kernel/core/pcm_lib.c:139: XRUN: pcmC0D0p [] dump_stack+0x17/0x20 [] snd_pcm_period_elapsed+0x28b/0x3f0 [snd_pcm] [] snd_emu10k1_interrupt+0x337/0x3c0 [snd_emu10k1] [] generic_handle_IRQ_event+0x33/0x60 [] do_IRQ+0xb7/0x190 [] common_interrupt+0x18/0x20 [] schedule+0x2d7/0x5b0 [] schedule_timeout+0x57/0xa0 [] do_poll+0xa1/0xc0 [] sys_poll+0x131/0x220 [] syscall_call+0x7/0xb (jackd/12430): 17135us non-preemptible critical section violated 400 us preempt threshold starting at schedule+0x57/0x5b0 and ending at schedule+0x2ef/0x5b0 [] dump_stack+0x17/0x20 [] sub_preempt_count+0x4b/0x60 [] schedule+0x2ef/0x5b0 [] schedule_timeout+0x57/0xa0 [] do_poll+0xa1/0xc0 [] sys_poll+0x131/0x220 [] syscall_call+0x7/0xb