From mboxrd@z Thu Jan 1 00:00:00 1970 From: Sebastian Andrzej Siewior Subject: Re: [PATCH v2] rtmutex: take the waiter lock with irqs off Date: Fri, 22 Nov 2013 18:44:53 +0100 Message-ID: <528F9815.3030208@linutronix.de> References: <1383798668.5441.25.camel@marge.simpson.net> <20131107125923.GB24644@localhost.localdomain> <1384243595.15180.63.camel@marge.simpson.net> <20131115163008.GB12164@linutronix.de> <20131115201436.GC12164@linutronix.de> <20131118141021.GA10022@twins.programming.kicks-ass.net> <20131122135931.GA8698@linutronix.de> <20131122160841.GS3866@twins.programming.kicks-ass.net> <528F846E.4000703@linutronix.de> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Cc: Thomas Gleixner , Mike Galbraith , Frederic Weisbecker , LKML , RT , "Paul E. McKenney" To: Peter Zijlstra Return-path: Received: from www.linutronix.de ([62.245.132.108]:46484 "EHLO Galois.linutronix.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753339Ab3KVRo7 (ORCPT ); Fri, 22 Nov 2013 12:44:59 -0500 In-Reply-To: <528F846E.4000703@linutronix.de> Sender: linux-rt-users-owner@vger.kernel.org List-ID: On 11/22/2013 05:21 PM, Sebastian Andrzej Siewior wrote: > On 11/22/2013 05:08 PM, Peter Zijlstra wrote: >> On Fri, Nov 22, 2013 at 02:59:31PM +0100, Sebastian Andrzej Siewior wrote: >>> +extern void __lockfunc rt_spin_try_unlock(spinlock_t *lock); >> >> I know what you mean, but.. try_unlock() just sounds wrong, how can we >> attempt but fail to unlock a lock we hold ;-) kernel BUG at kernel/rtmutex.c:850! [] rt_spin_try_unlock+0x25/0x30 [] get_next_timer_interrupt+0xdd/0x270 It depends how hard you try :P Bah. Sebastian