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From: Peter Zijlstra <peterz@infradead.org>
To: xlpang@redhat.com
Cc: linux-kernel@vger.kernel.org, Juri Lelli <juri.lelli@arm.com>,
	Ingo Molnar <mingo@redhat.com>,
	Steven Rostedt <rostedt@goodmis.org>,
	Thomas Gleixner <tglx@linutronix.de>
Subject: Re: [PATCH] sched/deadline/rtmutex: Fix a PI crash for deadline tasks
Date: Tue, 5 Apr 2016 13:32:33 +0200	[thread overview]
Message-ID: <20160405113233.GL3448@twins.programming.kicks-ass.net> (raw)
In-Reply-To: <57039806.2070102@redhat.com>

On Tue, Apr 05, 2016 at 06:48:38PM +0800, Xunlei Pang wrote:
> This is cool, I think we should also init "pi_task" properly for INIT_MUTEX and fork,
> otherwise looks good to me :-)

Indeed..

> Besides, do you think we can kill "pi_waiters_leftmost" from task_struct, as we
> can easily get it from "pi_waiters"?

I don't quickly see a way to do that, different locking rules govern the
two.. which was the whole problem we started with :/

> I will test it further with these new changes soon.

Thanks!

  reply	other threads:[~2016-04-05 11:32 UTC|newest]

Thread overview: 25+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2016-04-01 11:00 [PATCH] sched/deadline/rtmutex: Fix a PI crash for deadline tasks Xunlei Pang
2016-04-01 11:38 ` Peter Zijlstra
2016-04-01 12:23   ` Xunlei Pang
2016-04-01 13:12     ` Peter Zijlstra
2016-04-01 13:34       ` Xunlei Pang
2016-04-01 21:51         ` Peter Zijlstra
2016-04-02 10:19           ` Xunlei Pang
2016-04-05  8:38           ` Xunlei Pang
2016-04-05  9:19             ` Peter Zijlstra
2016-04-05  9:29               ` Peter Zijlstra
2016-04-05 10:48                 ` Xunlei Pang
2016-04-05 11:32                   ` Peter Zijlstra [this message]
2016-04-08 16:25                 ` Steven Rostedt
2016-04-08 17:38                   ` Peter Zijlstra
2016-04-08 18:50                     ` Steven Rostedt
2016-04-08 18:59                       ` Peter Zijlstra
2016-04-08 19:15                         ` Steven Rostedt
2016-04-08 19:28                           ` Steven Rostedt
2016-04-09  3:27                             ` Xunlei Pang
2016-04-09  3:25                         ` Xunlei Pang
2016-04-09 13:29                           ` Peter Zijlstra
2016-04-10  8:22                             ` Xunlei Pang
2016-04-12  3:08                               ` Xunlei Pang
2016-04-12 15:51                                 ` Peter Zijlstra
2016-04-13  2:13                                   ` Xunlei Pang

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