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Date: Mon, 25 Nov 2013 13:33:46 -0500
From: Paul Gortmaker <paul.gortmaker@windriver.com>
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To: Peter Zijlstra <peterz@infradead.org>,
        Sebastian Andrzej Siewior <bigeasy@linutronix.de>
CC: Thomas Gleixner <tglx@linutronix.de>, Mike Galbraith <bitbucket@online.de>,
        Frederic Weisbecker <fweisbec@gmail.com>,
        LKML <linux-kernel@vger.kernel.org>,
        RT <linux-rt-users@vger.kernel.org>,
        "Paul E. McKenney" <paulmck@linux.vnet.ibm.com>
Subject: Re: [PATCH v2] rtmutex: take the waiter lock with irqs off
References: <1383798668.5441.25.camel@marge.simpson.net> <alpine.DEB.2.02.1311071158350.23353@ionos.tec.linutronix.de> <20131107125923.GB24644@localhost.localdomain> <alpine.DEB.2.02.1311071402380.23353@ionos.tec.linutronix.de> <1384243595.15180.63.camel@marge.simpson.net> <alpine.DEB.2.02.1311121024590.30673@ionos.tec.linutronix.de> <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>
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On 13-11-22 11:08 AM, 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 ;-)

rt-v3.10-devel$git grep -l tryunlock
tasklet-rt-prevent-tasklets-from-going-into-infinite-spin-in-rt.patch
rt-v3.10-devel$

> 
> 
> /me crawls back under his rock ;-)

Can you take tasklets with you?   ;-)