From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755524AbYJZPIE (ORCPT ); Sun, 26 Oct 2008 11:08:04 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1754556AbYJZPHy (ORCPT ); Sun, 26 Oct 2008 11:07:54 -0400 Received: from wa-out-1112.google.com ([209.85.146.177]:59725 "EHLO wa-out-1112.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754061AbYJZPHx (ORCPT ); Sun, 26 Oct 2008 11:07:53 -0400 DomainKey-Signature: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma; h=message-id:date:from:to:subject:mime-version:content-type :content-transfer-encoding:content-disposition; b=s6EuAZnDi6urVo3bX74OF21ec0nAwcwiPQiH4uYU/AzhHjDCKTjj2dkFN32PrCEEaq 2BgKZx2iSZcDUpMuHXJ661CpUbxLXUoCKoSvKNWk1qEgtNn5Hekc8P8G2I5D/6cBZAxC lztm49EVSFiiG6S8LEhm/59IUQV+v721wgzok= Message-ID: <19f34abd0810260807n3a3a575ah62a60a5b6ed737f7@mail.gmail.com> Date: Sun, 26 Oct 2008 16:07:52 +0100 From: "Vegard Nossum" To: LKML Subject: v2.6.28-rc1: possible recursive locking detected MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit Content-Disposition: inline Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Hi, I think that this wasn't my fault. It's v2.6.28-rc1+kmemcheck. ============================================= [ INFO: possible recursive locking detected ] 2.6.28-rc1 #58 --------------------------------------------- cat/25690 is trying to acquire lock: (&hashbin->hb_spinlock){....}, at: [] irias_seq_show+0x3f/0x180 but task is already holding lock: (&hashbin->hb_spinlock){....}, at: [] irias_seq_start+0x15/0x90 other info that might help us debug this: 2 locks held by cat/25690: #0: (&p->lock){--..}, at: [] seq_read+0x25/0x2e0 #1: (&hashbin->hb_spinlock){....}, at: [] irias_seq_start+0x15/0x90 stack backtrace: Pid: 25690, comm: cat Not tainted 2.6.28-rc1 #58 Call Trace: [] ? printk+0x18/0x1a [] __lock_acquire+0xf0b/0xf80 [] ? kmemcheck_hide_addr+0x4a/0x60 [] ? do_debug+0x3b/0x1b0 [] lock_acquire+0x71/0xa0 [] ? irias_seq_show+0x3f/0x180 [] _spin_lock+0x36/0x60 [] ? irias_seq_show+0x3f/0x180 [] irias_seq_show+0x3f/0x180 [] seq_read+0x1ec/0x2e0 [] ? seq_read+0x0/0x2e0 [] proc_reg_read+0x5d/0x90 [] vfs_read+0x99/0x160 [] ? proc_reg_read+0x0/0x90 [] sys_read+0x3d/0x70 [] sysenter_do_call+0x12/0x3f [] ? svm_intr_assist+0x90/0x1a0 Vegard -- "The animistic metaphor of the bug that maliciously sneaked in while the programmer was not looking is intellectually dishonest as it disguises that the error is the programmer's own creation." -- E. W. Dijkstra, EWD1036