Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755518AbWKRNMp (ORCPT ); Sat, 18 Nov 2006 08:12:45 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1755524AbWKRNMp (ORCPT ); Sat, 18 Nov 2006 08:12:45 -0500 Received: from mx2.mail.ru ([194.67.23.122]:7558 "EHLO mx2.mail.ru") by vger.kernel.org with ESMTP id S1755518AbWKRNMo (ORCPT ); Sat, 18 Nov 2006 08:12:44 -0500 From: Andrey Borzenkov To: samuel@sortiz.org Subject: 2.6.19-rc5: lockdep warnings starting irattach Date: Sat, 18 Nov 2006 16:12:25 +0300 User-Agent: KMail/1.9.5 Cc: irda-users@lists.sourceforge.net, linux-kernel@vger.kernel.org Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Content-Disposition: inline Message-Id: <200611181612.36008.arvidjaar@mail.ru> Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 2432 Lines: 71 -----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 I experimented with SyncCE; after starting IrDA I got this: Serial: 8250/16550 driver $Revision: 1.90 $ 4 ports, IRQ sharing enabled serial8250: ttyS0 at I/O 0x3f8 (irq = 4) is a 16550A 00:09: ttyS0 at I/O 0x3f8 (irq = 4) is a 16550A ip_tables: (C) 2000-2006 Netfilter Core Team ============================================= [ INFO: possible recursive locking detected ] 2.6.19-rc5-2avb #2 - --------------------------------------------- pppd/26425 is trying to acquire lock: (&hashbin->hb_spinlock){....}, at: [] irlmp_slsap_inuse+0x5a/0x170 [irda] but task is already holding lock: (&hashbin->hb_spinlock){....}, at: [] irlmp_slsap_inuse+0x37/0x170 [irda] other info that might help us debug this: 1 lock held by pppd/26425: #0: (&hashbin->hb_spinlock){....}, at: [] irlmp_slsap_inuse+0x37/0x170 [irda] stack backtrace: [] dump_trace+0x1cc/0x200 [] show_trace_log_lvl+0x1a/0x30 [] show_trace+0x12/0x20 [] dump_stack+0x19/0x20 [] __lock_acquire+0x8fa/0xc20 [] lock_acquire+0x5d/0x80 [] _spin_lock+0x2c/0x40 [] irlmp_slsap_inuse+0x5a/0x170 [irda] [] irlmp_open_lsap+0x62/0x180 [irda] [] irttp_open_tsap+0x181/0x230 [irda] [] ircomm_open_tsap+0x5d/0xa0 [ircomm] [] ircomm_open+0xb8/0xd0 [ircomm] [] ircomm_tty_open+0x4f7/0x570 [ircomm_tty] [] tty_open+0x174/0x340 [] chrdev_open+0x89/0x170 [] __dentry_open+0xa6/0x1d0 [] nameidata_to_filp+0x35/0x40 [] do_filp_open+0x49/0x50 [] do_sys_open+0x47/0xd0 [] sys_open+0x1c/0x20 [] sysenter_past_esp+0x56/0x8d [] 0xb7f86410 ======================= This apparently happens when irattach is run. Interface itself (irda0) is created as far as I can tell. Please let me know if additional information is required. - -andrey -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.5 (GNU/Linux) iD8DBQFFXwbDR6LMutpd94wRAiUpAJwIK5hSusOwFUloh0jXOb5hk5iVwgCfX7Iq c5kRWItPWR9WGw4jORPd21k= =oax8 -----END PGP SIGNATURE----- - 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/