From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751167AbWE2Sct (ORCPT ); Mon, 29 May 2006 14:32:49 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1751171AbWE2Sct (ORCPT ); Mon, 29 May 2006 14:32:49 -0400 Received: from wr-out-0506.google.com ([64.233.184.235]:11322 "EHLO wr-out-0506.google.com") by vger.kernel.org with ESMTP id S1751167AbWE2Sct convert rfc822-to-8bit (ORCPT ); Mon, 29 May 2006 14:32:49 -0400 DomainKey-Signature: a=rsa-sha1; q=dns; c=nofws; s=beta; d=gmail.com; h=received:message-id:date:from:to:subject:cc:mime-version:content-type:content-transfer-encoding:content-disposition; b=DRRDzOpJOXdBd5yVeu0VO+Kt4eBf8kcAFuWsZQK+ohwBdJ4z+ptch4CWQKeuDwkseEEWwzUYBmZiKsBFi3dz3VP22dX19sYeKliYKgA0uqqsHx7IV8guncaC5QauJxYXamoi1qCS1gRmp8u+ydkPSpkxUui8xLrsuFLwFe/dCks= Message-ID: <6bffcb0e0605291132u701cd69tb855cf60fa317994@mail.gmail.com> Date: Mon, 29 May 2006 20:32:47 +0200 From: "Michal Piotrowski" To: "Ingo Molnar" Subject: 2.6.17-rc4-mm3-lockdep BUG: possible deadlock detected! Cc: perex@suse.cz, alsa-devel@alsa-project.org, "Andrew Morton" , LKML MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII; format=flowed Content-Transfer-Encoding: 7BIT Content-Disposition: inline Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Hi, I get this with Ingo's lockdep patch from http://people.redhat.com/mingo/generic-irq-subsystem/ ==================================== [ BUG: possible deadlock detected! ] ------------------------------------ modprobe/592 is trying to acquire lock: (&grp->list_mutex){----}, at: [] snd_seq_port_connect+0xc0/0x337 [snd_seq] but task is already holding lock: (&grp->list_mutex){----}, at: [] snd_seq_port_connect+0x66/0x337 [snd_seq] which could potentially lead to deadlocks! other info that might help us debug this: 1 locks held by modprobe/592: #0: (&grp->list_mutex){----}, at: [] snd_seq_port_connect+0x66/0x337 [snd_seq] stack backtrace: show_trace+0xd/0xf dump_stack+0x17/0x19 __lockdep_acquire+0xa1a/0xa39 lockdep_acquire+0x69/0x82 snd_seq_port_connect+0xdb/0x337 [snd_seq] snd_seq_ioctl_subscribe_port+0x96/0xe6 [snd_seq] snd_seq_do_ioctl+0x5d/0x68 [snd_seq] snd_seq_kernel_client_ctl+0x2d/0x3b [snd_seq] snd_seq_oss_create_client+0x12d/0x142 [snd_seq_oss] alsa_seq_oss_init+0xf7/0x147 [snd_seq_oss] sys_init_module+0xa6/0x230 sysenter_past_esp+0x54/0x8d Here is dmesg http://www.stardust.webpages.pl/files/lockdep/2.6.17-rc4-mm3-lockdep1/lockdep-dmesg Here is config http://www.stardust.webpages.pl/files/lockdep/2.6.17-rc4-mm3-lockdep1/lockdep-config Regards, Michal -- Michal K. K. Piotrowski LTG - Linux Testers Group (http://www.stardust.webpages.pl/ltg/wiki/)