From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1750789AbWDXO0N (ORCPT ); Mon, 24 Apr 2006 10:26:13 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1750833AbWDXO0N (ORCPT ); Mon, 24 Apr 2006 10:26:13 -0400 Received: from cantor.suse.de ([195.135.220.2]:668 "EHLO mx1.suse.de") by vger.kernel.org with ESMTP id S1750789AbWDXO0M (ORCPT ); Mon, 24 Apr 2006 10:26:12 -0400 Date: Mon, 24 Apr 2006 16:26:10 +0200 Message-ID: From: Takashi Iwai To: Alexey Dobriyan Cc: Lee Revell , Andrew Morton , linux-kernel@vger.kernel.org, perex@suse.cz, alsa-devel@alsa-project.org Subject: Re: [Alsa-devel] Re: ALSA regression: oops on shutdown In-Reply-To: References: <20060423235730.GA7934@mipter.zuzino.mipt.ru> <20060423185721.39ff4207.akpm@osdl.org> <1145846360.31507.50.camel@mindpipe> <20060424031142.GA7735@mipter.zuzino.mipt.ru> <20060424035144.GA7750@mipter.zuzino.mipt.ru> User-Agent: Wanderlust/2.12.0 (Your Wildest Dreams) SEMI/1.14.6 (Maruoka) FLIM/1.14.7 (=?ISO-8859-4?Q?Sanj=F2?=) APEL/10.6 MULE XEmacs/21.5 (beta25) (eggplant) (+CVS-20060326) (i386-suse-linux) MIME-Version: 1.0 (generated by SEMI 1.14.6 - "Maruoka") Content-Type: text/plain; charset=US-ASCII Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org At Mon, 24 Apr 2006 15:34:30 +0200, I wrote: > > At Mon, 24 Apr 2006 07:51:44 +0400, > Alexey Dobriyan wrote: > > > > On Mon, Apr 24, 2006 at 07:11:42AM +0400, Alexey Dobriyan wrote: > > > On Sun, Apr 23, 2006 at 10:39:19PM -0400, Lee Revell wrote: > > > > > > Andrew asked about precise steps of reproduction: > > > > > > rmmod snd_pcm_oss > > > > > > which is part of Gentoo install scripts (/etc/init.d/alsasound:134-140, to > > > be precise) (basically lsmod | grep snd | xargs rmmod). > > > > > > BUG: unable to handle kernel paging request at virtual address 6b6b6b6b > > > printing eip: > > > c016c6a4 > > > *pde = 00000000 > > > Oops: 0000 [#1] > > > PREEMPT > > > Modules linked in: snd_pcm_oss snd_mixer_oss snd_intel8x0 snd_ac97_codec snd_ac97_bus snd_pcm snd_timer snd soundcore snd_page_alloc ehci_hcd uhci_hcd usbcore > > > CPU: 0 > > > EIP: 0060:[] Not tainted VLI > > > EFLAGS: 00010286 (2.6.17-rc2-6b426e785cb81e53dc2fc4dcf997661472b470ef #1) > > > EIP is at remove_proc_entry+0x2c/0x11c > > > eax: 00000000 ebx: deb48b80 ecx: ffffffff edx: de11ed24 > > > esi: de11ed24 edi: 6b6b6b6b ebp: de4cb000 esp: de4cbf28 > > > ds: 007b es: 007b ss: 0068 > > > Process rmmod (pid: 7735, threadinfo=de4cb000 task=c1487a90) > > > Stack: <0>de11ed24 6b6b6b6b deb48b80 de11ed24 bf8590cc df93603b de4f0e78 00000000 > > > df965fc8 de4f0d84 df967e74 df966184 de4f0d88 df95292d df967f00 00000000 > > > c0125f7a 00000000 5f646e73 5f6d6370 0073736f de85d4a4 b7f27000 c013789d > > > Call Trace: > > > [] snd_info_unregister+0x2e/0x44 [snd] > > > [] snd_pcm_oss_proc_done+0x19/0x30 [snd_pcm_oss] > > > [] snd_pcm_oss_unregister_minor+0x3b/0x3f [snd_pcm_oss] > > > [] snd_pcm_notify+0x4a/0x91 [snd_pcm] > > > [] sys_delete_module+0x113/0x138 > > > [] do_munmap+0xe2/0xef > > > [] syscall_call+0x7/0xb > > > Code: 85 d2 56 53 51 51 89 14 24 89 44 24 04 75 13 8d 4c 24 04 89 e2 e8 dd f7 ff ff 85 c0 0f 85 f2 00 00 00 8b 7c 24 04 31 c0 83 c9 ff ae f7 d1 49 b0 01 89 ce e8 fa 13 fa ff 8b 04 24 8d 58 38 83 > > > EIP: [] remove_proc_entry+0x2c/0x11c SS:ESP 0068:de4cbf28 > > > BUG: rmmod/7735, lock held at task exit time! > > > [df960920] {register_mutex} > > > .. held by: rmmod: 7735 [c1487a90, 118] > > > ... acquired at: snd_pcm_notify+0x10/0x91 [snd_pcm] > > > > Other symptoms are 6 (six) "prealloc" files, 3 "oss" files and 1 "oss" > > directory (according to highlighting): > > > > $ ls /proc/asound/ > > card0 devices modules oss oss prealloc prealloc prealloc timers > > ^^^ > > directory > > > > cards ICH5 oss oss pcm prealloc prealloc prealloc version > > > > "ls -l" thinks all 4 "oss" files are files (again, according to > > highlighting). > > That's odd. It implies that the proc file paths are flatten. But, not all entries seem flatten (e.g. pcm0p, sub0, etc). Could you show the output of "tree /proc/asound" ? Takashi