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From: Peter Zijlstra <peterz@infradead.org>
To: Tim Sander <tim.sander@hbm.com>
Cc: Thomas Gleixner <tglx@linutronix.de>,
	LKML <linux-kernel@vger.kernel.org>,
	linux-rt-users <linux-rt-users@vger.kernel.org>,
	"Paul E. McKenney" <paulmck@linux.vnet.ibm.com>
Subject: Re: [ANNOUNCE] 3.0-rt6 : BUG at kernel/trmutex.c:724!
Date: Thu, 04 Aug 2011 18:37:09 +0200	[thread overview]
Message-ID: <1312475829.16729.45.camel@twins> (raw)
In-Reply-To: <201108041834.20575.tim.sander@hbm.com>

On Thu, 2011-08-04 at 18:34 +0200, Tim Sander wrote:
> I was really happy to find 6 preempt rt releases for the 3.0 kernel after holliday :-).
> 
> So i went for a testdrive and found an error: The error occurs in a non released non 
> mainline kernel and is available from me upon request. It has been working on 
> (2.6.39,3.0) but is not working on 3.0-rt6. It fails in an interrupt which calls: 
> 
> wake_up_interruptible(&hbm_device.wait);
> 
> The waitque has been initialized with:
> init_waitqueue_head(&hbm_device.wait);
> before interrupts where enabled. So i don't think its a race. 

looks like it tries to use waitqueues from hardirq context, that's a
no-no for -rt. That interrupt should be a threaded interrupt.

  reply	other threads:[~2011-08-04 16:37 UTC|newest]

Thread overview: 29+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2011-07-28 21:43 [ANNOUNCE] 3.0-rt6 Thomas Gleixner
2011-07-28 22:33 ` Madovsky
2011-07-28 23:33 ` Peter W. Morreale
2011-07-29  0:56   ` Thomas Gleixner
2011-07-29  6:05 ` Mike Galbraith
2011-07-29 14:03 ` Paul E. McKenney
2011-07-29 15:57 ` [ANNOUNCE] 3.0-rt6 (kgdb working) Darren Hart
2011-07-30 15:49 ` [ANNOUNCE] 3.0-rt6 Remy Bohmer
2011-07-30 15:49   ` Remy Bohmer
2011-07-30 20:21   ` Remy Bohmer
2011-08-07 10:44     ` Remy Bohmer
2011-08-01  8:42 ` Rolando Martins
2011-08-01 10:34   ` Mike Galbraith
2011-08-01 10:45     ` Rolando Martins
2011-08-01 10:45       ` Rolando Martins
2011-08-01 11:06   ` Peter Zijlstra
2011-08-01 11:10     ` Rolando Martins
2011-08-04  6:34 ` Fernando Lopez-Lezcano
2011-08-04  9:42   ` Peter Zijlstra
2011-08-04 19:05     ` Fernando Lopez-Lezcano
2011-08-04 20:15       ` Uwe Kleine-König
2011-08-05  9:28         ` Uwe Kleine-König
2011-08-05 16:03           ` Fernando Lopez-Lezcano
2011-08-08 17:25     ` Fernando Lopez-Lezcano
2011-08-04 16:34 ` [ANNOUNCE] 3.0-rt6 : BUG at kernel/trmutex.c:724! Tim Sander
2011-08-04 16:34   ` Tim Sander
2011-08-04 16:37   ` Peter Zijlstra [this message]
2011-08-04 17:04     ` Tim Sander
2011-08-04 17:04       ` Tim Sander

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