linux-kernel - Re: [PATCH v2] rtmutex: take the waiter lock with irqs off

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Message-ID: <5293980A.4030804@windriver.com>
Date:	Mon, 25 Nov 2013 13:33:46 -0500
From:	Paul Gortmaker <paul.gortmaker@...driver.com>
To:	Peter Zijlstra <peterz@...radead.org>,
	Sebastian Andrzej Siewior <bigeasy@...utronix.de>
CC:	Thomas Gleixner <tglx@...utronix.de>,
	Mike Galbraith <bitbucket@...ine.de>,
	Frederic Weisbecker <fweisbec@...il.com>,
	LKML <linux-kernel@...r.kernel.org>,
	RT <linux-rt-users@...r.kernel.org>,
	"Paul E. McKenney" <paulmck@...ux.vnet.ibm.com>
Subject: Re: [PATCH v2] rtmutex: take the waiter lock with irqs off

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?   ;-)
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