From: Sergey Senozhatsky <sergey.senozhatsky@gmail.com>
To: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Ingo Molnar <mingo@elte.hu>, Thomas Gleixner <tglx@linutronix.de>,
Andrew Morton <akpm@linux-foundation.org>,
linux-kernel@vger.kernel.org,
KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>,
linux-mm@kvack.org
Subject: Re: select_task_rq_fair: WARNING: at kernel/lockdep.c match_held_lock
Date: Thu, 4 Aug 2011 18:53:47 +0300 [thread overview]
Message-ID: <20110804155347.GB3562@swordfish.minsk.epam.com> (raw)
In-Reply-To: <1312472867.16729.38.camel@twins>
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
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next prev parent reply other threads:[~2011-08-04 15:54 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-08-04 14:13 Sergey Senozhatsky
2011-08-04 15:05 ` Peter Zijlstra
2011-08-04 15:13 ` Peter Zijlstra
2011-08-04 15:37 ` Sergey Senozhatsky
2011-08-04 15:47 ` Peter Zijlstra
2011-08-04 15:53 ` Sergey Senozhatsky [this message]
2011-08-04 15:57 ` Peter Zijlstra
2011-08-04 16:04 ` Sergey Senozhatsky
2011-08-05 12:36 ` Peter Zijlstra
2011-08-05 15:27 ` Sergey Senozhatsky
2011-08-06 19:39 ` Sergey Senozhatsky
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