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From: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
To: Thomas Gleixner <tglx@linutronix.de>
Cc: Peter Zijlstra <peterz@infradead.org>,
	LKML <linux-kernel@vger.kernel.org>,
	Frederic Weisbecker <frederic@kernel.org>,
	Paul McKenney <paulmck@kernel.org>
Subject: Re: [patch V2 9/9] tasklets: Prevent kill/unlock_wait deadlock on RT
Date: Mon, 7 Dec 2020 16:39:08 +0100	[thread overview]
Message-ID: <20201207153908.5orqlhp3v5xoat63@linutronix.de> (raw)
In-Reply-To: <87tusx63q8.fsf@nanos.tec.linutronix.de>

On 2020-12-07 16:22:07 [+0100], Thomas Gleixner wrote:
> On Mon, Dec 07 2020 at 15:00, Sebastian Andrzej Siewior wrote:
> > So we keep the RT part as-is and replace the non-RT bits with this?
> 
> No. It would work for both.

So instead of boosting our way through we simply wait until the tasklet
completes. Given that canceling is usually done on start/stop events, it
shouldn't matter if the RT priority is lost.

Sebastian

  reply	other threads:[~2020-12-07 15:40 UTC|newest]

Thread overview: 38+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-12-04 17:01 [patch V2 0/9] softirq: Make it RT aware Thomas Gleixner
2020-12-04 17:01 ` [patch V2 1/9] softirq: Add RT specific softirq accounting Thomas Gleixner
2020-12-07 13:06   ` Frederic Weisbecker
2020-12-04 17:01 ` [patch V2 2/9] irqtime: Make accounting correct on RT Thomas Gleixner
2020-12-07  0:23   ` Frederic Weisbecker
2020-12-07  0:57     ` Thomas Gleixner
2020-12-07  1:14       ` Frederic Weisbecker
2020-12-07 13:27   ` Frederic Weisbecker
2020-12-07 14:44     ` Thomas Gleixner
2020-12-04 17:01 ` [patch V2 3/9] softirq: Move various protections into inline helpers Thomas Gleixner
2020-12-07 13:37   ` Frederic Weisbecker
2020-12-04 17:01 ` [patch V2 4/9] softirq: Make softirq control and processing RT aware Thomas Gleixner
2020-12-07 14:16   ` Frederic Weisbecker
2020-12-07 15:08     ` Thomas Gleixner
2020-12-08  0:08   ` Frederic Weisbecker
2020-12-09 10:11   ` Peter Zijlstra
2020-12-09 12:36     ` Thomas Gleixner
2020-12-09 12:42       ` Peter Zijlstra
2020-12-09 13:30         ` Thomas Gleixner
2020-12-09 10:34   ` Peter Zijlstra
2020-12-04 17:01 ` [patch V2 5/9] tick/sched: Prevent false positive softirq pending warnings on RT Thomas Gleixner
2020-12-08 12:23   ` Frederic Weisbecker
2020-12-04 17:01 ` [patch V2 6/9] rcu: Prevent false positive softirq warning " Thomas Gleixner
2020-12-04 17:59   ` Paul E. McKenney
2020-12-04 17:01 ` [patch V2 7/9] softirq: Replace barrier() with cpu_relax() in tasklet_unlock_wait() Thomas Gleixner
2020-12-07 11:39   ` Peter Zijlstra
2020-12-07 15:21     ` Thomas Gleixner
2020-12-04 17:01 ` [patch V2 8/9] tasklets: Use static inlines for stub implementations Thomas Gleixner
2020-12-04 17:02 ` [patch V2 9/9] tasklets: Prevent kill/unlock_wait deadlock on RT Thomas Gleixner
2020-12-07 11:47   ` Peter Zijlstra
2020-12-07 14:00     ` Sebastian Andrzej Siewior
2020-12-07 14:27       ` Peter Zijlstra
2020-12-07 17:55         ` Thomas Gleixner
2020-12-07 15:22       ` Thomas Gleixner
2020-12-07 15:39         ` Sebastian Andrzej Siewior [this message]
2020-12-07 17:49           ` Thomas Gleixner
2020-12-07 17:50             ` Thomas Gleixner
2020-12-06 10:05 ` [patch V2 0/9] softirq: Make it RT aware Sebastian Andrzej Siewior

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