From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from ozlabs.org (ozlabs.org [203.10.76.45]) (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (Client CN "mx.ozlabs.org", Issuer "CA Cert Signing Authority" (verified OK)) by bilbo.ozlabs.org (Postfix) with ESMTPS id D6E5EB7213 for ; Thu, 18 Jun 2009 22:04:07 +1000 (EST) Received: from e23smtp08.au.ibm.com (e23smtp08.au.ibm.com [202.81.31.141]) (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (Client CN "e23smtp08.au.ibm.com", Issuer "Equifax" (verified OK)) by ozlabs.org (Postfix) with ESMTPS id B923ADDD1B for ; Thu, 18 Jun 2009 22:04:06 +1000 (EST) Received: from d23relay01.au.ibm.com (d23relay01.au.ibm.com [202.81.31.243]) by e23smtp08.au.ibm.com (8.13.1/8.13.1) with ESMTP id n5IM1DTS017551 for ; Fri, 19 Jun 2009 08:01:13 +1000 Received: from d23av02.au.ibm.com (d23av02.au.ibm.com [9.190.235.138]) by d23relay01.au.ibm.com (8.13.8/8.13.8/NCO v9.2) with ESMTP id n5IC42qY446964 for ; Thu, 18 Jun 2009 22:04:02 +1000 Received: from d23av02.au.ibm.com (loopback [127.0.0.1]) by d23av02.au.ibm.com (8.12.11.20060308/8.13.3) with ESMTP id n5IC42Rt007554 for ; Thu, 18 Jun 2009 22:04:02 +1000 Message-ID: <4A3A2D2B.7070704@in.ibm.com> Date: Thu, 18 Jun 2009 17:33:55 +0530 From: Sachin Sant MIME-Version: 1.0 To: linux-kernel Subject: [PowerPC] Badness at drivers/char/tty_ldisc.c:210 during shutdown Content-Type: text/plain; charset=ISO-8859-1; format=flowed Cc: linuxppc-dev@ozlabs.org, alan@lxorguk.ukuu.org.uk List-Id: Linux on PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , I came across the following badness message during shutdown on a Power6 box. This was with 2.6.30-git12(3fe0344faf7fdcb158bd5c1a9aec960a8d70c8e8) ------------[ cut here ]------------ Badness at drivers/char/tty_ldisc.c:210 NIP: c000000000409428 LR: c000000000409410 CTR: 0000000000000000 REGS: c0000000374f37f0 TRAP: 0700 Not tainted (2.6.30-git12) MSR: 8000000000029032 CR: 24000484 XER: 00000001 TASK = c00000003d941ae0[8535] 'vhangup' THREAD: c0000000374f0000 CPU: 1 <6>GPR00: 0000000000000001 c0000000374f3a70 c000000000ef4550 0000000000000001 <6>GPR04: c000000000409410 c00000003e99f000 c000000000406ba0 0000000000000000 <6>GPR08: 0000000000000000 0000000000000000 0000000000000000 c0000000374f3a70 <6>GPR12: 0000000024000488 c000000001002600 00000000ffffffff ffffffffffffffff <6>GPR16: 00000000320c8a50 0000000000000002 0000000000000000 00000000320b03b0 <6>GPR20: 0000000000000000 0000000000000000 c00000003e1d3d00 0000000000000001 <6>GPR24: 0000000000000000 0000000000000000 0000000000000001 c00000003d4a05e0 <6>GPR28: 0000000000000000 c0000000013ffd38 c000000000e7e610 c0000000374f3a70 NIP [c000000000409428] .tty_ldisc_put+0xbc/0xf4 LR [c000000000409410] .tty_ldisc_put+0xa4/0xf4 Call Trace: [c0000000374f3a70] [c000000000409410] .tty_ldisc_put+0xa4/0xf4 (unreliable) [c0000000374f3b10] [c000000000409808] .tty_ldisc_reinit+0x38/0x80 [c0000000374f3ba0] [c00000000040a218] .tty_ldisc_hangup+0x190/0x260 [c0000000374f3c40] [c0000000004000d0] .do_tty_hangup+0x188/0x4c0 [c0000000374f3d20] [c000000000400480] .tty_vhangup_self+0x34/0x54 [c0000000374f3db0] [c0000000001917c8] .sys_vhangup+0x38/0x58 [c0000000374f3e30] [c000000000008534] syscall_exit+0x0/0x40 Instruction dump: 912b0088 4bcd2201 60000000 e87e8008 7f44d378 481c0735 60000000 801b0008 7c09fe70 7d200278 7c004850 54000ffe <0b000000> 7f63db78 4bd7cf0d 60000000 Not sure if this is a new issue. I haven't really paid attention to messages that are displayed during shutdown. Line 210 corresponds to the following code. static void tty_ldisc_put(struct tty_ldisc *ld) { ...... spin_unlock_irqrestore(&tty_ldisc_lock, flags); WARN_ON(ld->refcount); <<=== ....... Thanks -Sachin -- --------------------------------- Sachin Sant IBM Linux Technology Center India Systems and Technology Labs Bangalore, India ---------------------------------