From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail6.bemta7.messagelabs.com (mail6.bemta7.messagelabs.com [216.82.255.55]) by kanga.kvack.org (Postfix) with ESMTP id BD983900138 for ; Thu, 4 Aug 2011 11:54:52 -0400 (EDT) Received: by eyh6 with SMTP id 6so1415371eyh.20 for ; Thu, 04 Aug 2011 08:54:48 -0700 (PDT) Date: Thu, 4 Aug 2011 18:53:47 +0300 From: Sergey Senozhatsky Subject: Re: select_task_rq_fair: WARNING: at kernel/lockdep.c match_held_lock Message-ID: <20110804155347.GB3562@swordfish.minsk.epam.com> References: <20110804141306.GA3536@swordfish.minsk.epam.com> <1312470358.16729.25.camel@twins> <20110804153752.GA3562@swordfish.minsk.epam.com> <1312472867.16729.38.camel@twins> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <1312472867.16729.38.camel@twins> Sender: owner-linux-mm@kvack.org List-ID: To: Peter Zijlstra Cc: Ingo Molnar , Thomas Gleixner , Andrew Morton , linux-kernel@vger.kernel.org, KAMEZAWA Hiroyuki , linux-mm@kvack.org On (08/04/11 17:47), Peter Zijlstra wrote: > On Thu, 2011-08-04 at 18:37 +0300, Sergey Senozhatsky wrote: > > > > [ 132.794685] WARNING: at kernel/lockdep.c:3117 match_held_lock+0xf6/0x12e() > > Just to double check, that line is: > > if (DEBUG_LOCKS_WARN_ON(!hlock->nest_lock)) > > in your kernel source? > Nope, that's `if (DEBUG_LOCKS_WARN_ON(!class))' 3106 static int match_held_lock(struct held_lock *hlock, struct lockdep_map *lock) 3107 { 3108 if (hlock->instance == lock) 3109 return 1; 3110 3111 if (hlock->references) { 3112 struct lock_class *class = lock->class_cache[0]; 3113 3114 if (!class) 3115 class = look_up_lock_class(lock, 0); 3116 3117 if (DEBUG_LOCKS_WARN_ON(!class)) 3118 return 0; 3119 3120 if (DEBUG_LOCKS_WARN_ON(!hlock->nest_lock)) 3121 return 0; 3122 3123 if (hlock->class_idx == class - lock_classes + 1) 3124 return 1; 3125 } 3126 3127 return 0; 3128 } 3129 Sergey -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@kvack.org. For more info on Linux MM, see: http://www.linux-mm.org/ . Fight unfair telecom internet charges in Canada: sign http://stopthemeter.ca/ Don't email: email@kvack.org