From: Peter Zijlstra <peterz@infradead.org>
To: "Paul E. McKenney" <paulmck@kernel.org>
Cc: vschneid@redhat.com, linux-kernel@vger.kernel.org,
sfr@canb.auug.org.au, linux-next@vger.kernel.org,
kernel-team@meta.com
Subject: Re: [BUG almost bisected] Splat in dequeue_rt_stack() and build error
Date: Mon, 7 Oct 2024 11:34:12 +0200 [thread overview]
Message-ID: <20241007093412.GA4879@noisy.programming.kicks-ass.net> (raw)
In-Reply-To: <9961cb9c-70f0-405b-b259-575586905ae0@paulmck-laptop>
On Sun, Oct 06, 2024 at 01:44:53PM -0700, Paul E. McKenney wrote:
> > I've given it 200*20m and the worst I got was one dl-server double
> > enqueue. I'll go stare at that I suppose.
>
> With your patch, I got 24 failures out of 100 TREE03 runs of 18 hours
> each. The failures were different, though, mostly involving boost
> failures in which RCU priority boosting didn't actually result in the
> low-priority readers getting boosted. An ftrace/event-trace dump of
> such a situation is shown below.
Urgh, WTF and more of that. Let me go ponder things.
Thanks for testing.
next prev parent reply other threads:[~2024-10-07 9:34 UTC|newest]
Thread overview: 68+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-08-21 21:57 [BUG almost bisected] Splat in dequeue_rt_stack() and build error Paul E. McKenney
2024-08-22 23:01 ` Paul E. McKenney
2024-08-23 7:47 ` Peter Zijlstra
2024-08-23 12:46 ` Paul E. McKenney
2024-08-23 21:51 ` Paul E. McKenney
2024-08-24 6:54 ` Peter Zijlstra
2024-08-24 15:26 ` Paul E. McKenney
2024-08-25 2:10 ` Paul E. McKenney
2024-08-25 19:36 ` Paul E. McKenney
2024-08-26 11:44 ` Valentin Schneider
2024-08-26 16:31 ` Paul E. McKenney
2024-08-27 10:03 ` Valentin Schneider
2024-08-27 15:41 ` Valentin Schneider
2024-08-27 17:33 ` Paul E. McKenney
2024-08-27 18:35 ` Paul E. McKenney
2024-08-27 20:30 ` Valentin Schneider
2024-08-27 20:36 ` Paul E. McKenney
2024-08-28 12:35 ` Valentin Schneider
2024-08-28 13:03 ` Paul E. McKenney
2024-08-28 13:40 ` Paul E. McKenney
2024-08-28 13:44 ` Chen Yu
2024-08-28 14:32 ` Valentin Schneider
2024-08-28 16:35 ` Paul E. McKenney
2024-08-28 18:17 ` Valentin Schneider
2024-08-28 18:39 ` Paul E. McKenney
2024-08-29 10:28 ` Paul E. McKenney
2024-08-29 13:50 ` Valentin Schneider
2024-08-29 14:13 ` Paul E. McKenney
2024-09-08 16:32 ` Paul E. McKenney
2024-09-13 14:08 ` Paul E. McKenney
2024-09-13 16:55 ` Valentin Schneider
2024-09-13 18:00 ` Paul E. McKenney
2024-09-30 19:09 ` Paul E. McKenney
2024-09-30 20:44 ` Valentin Schneider
2024-10-01 10:10 ` Paul E. McKenney
2024-10-01 12:52 ` Valentin Schneider
2024-10-01 16:47 ` Paul E. McKenney
2024-10-02 9:01 ` Tomas Glozar
2024-10-02 12:07 ` Paul E. McKenney
2024-10-10 11:24 ` Tomas Glozar
2024-10-10 15:01 ` Paul E. McKenney
2024-10-10 23:28 ` Paul E. McKenney
2024-10-14 18:55 ` Paul E. McKenney
2024-10-21 19:25 ` Paul E. McKenney
2024-11-14 18:16 ` Paul E. McKenney
2024-12-15 18:31 ` Paul E. McKenney
2024-12-16 14:38 ` Tomas Glozar
2024-12-16 19:36 ` Paul E. McKenney
2024-12-17 16:42 ` Paul E. McKenney
2024-10-22 6:33 ` Tomas Glozar
2024-10-03 8:40 ` Peter Zijlstra
2024-10-03 8:47 ` Peter Zijlstra
2024-10-03 9:27 ` Peter Zijlstra
2024-10-03 12:28 ` Peter Zijlstra
2024-10-03 12:45 ` Paul E. McKenney
2024-10-03 14:22 ` Peter Zijlstra
2024-10-03 16:04 ` Paul E. McKenney
2024-10-03 18:50 ` Peter Zijlstra
2024-10-03 19:12 ` Paul E. McKenney
2024-10-04 13:22 ` Paul E. McKenney
2024-10-04 13:35 ` Peter Zijlstra
2024-10-06 20:44 ` Paul E. McKenney
2024-10-07 9:34 ` Peter Zijlstra [this message]
2024-10-08 11:11 ` Peter Zijlstra
2024-10-08 16:24 ` Paul E. McKenney
2024-10-08 22:34 ` Paul E. McKenney
2024-10-12 14:16 ` [tip: sched/urgent] sched: Fix delayed_dequeue vs switched_from_fair() tip-bot2 for Peter Zijlstra
2024-10-03 12:44 ` [BUG almost bisected] Splat in dequeue_rt_stack() and build error Paul E. McKenney
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