From: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
To: "Moritz KLAMMLER (FERCHAU)" <Moritz.Klammler@ferchau.com>
Cc: Thomas Gleixner <tglx@kernel.org>,
Peter Zijlstra <peterz@infradead.org>,
"linux-rt-devel@lists.linux.dev" <linux-rt-devel@lists.linux.dev>,
"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>
Subject: Re: AW: Possible PREEMPT_RT live-lock / priority-inversion between FUTEX_CMP_REQUEUE_PI and FUTEX_WAIT_REQUEUE_PI
Date: Thu, 23 Apr 2026 12:06:27 +0200 [thread overview]
Message-ID: <20260423100627.O634mccg@linutronix.de> (raw)
In-Reply-To: <PR3PR06MB68891F0E8CF17A4260D46EE8FF4BA@PR3PR06MB6889.eurprd06.prod.outlook.com>
On 2026-03-23 16:12:24 [+0000], Moritz KLAMMLER (FERCHAU) wrote:
> Thanks for your quick and helpful response, Sebastian.
>
> We have tried your patch and it indeed seems to solve the problem (using
> the example program from my previous message as a test case). It also
> certainly is more elegant than any of the other options we've considered
> so far. Thank you very much. I'll report back if our system test
> should find any unexpected regression in the following days.
Ping.
Sebastian
prev parent reply other threads:[~2026-04-23 10:06 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-03-20 19:23 Possible PREEMPT_RT live-lock / priority-inversion between FUTEX_CMP_REQUEUE_PI and FUTEX_WAIT_REQUEUE_PI Moritz KLAMMLER (FERCHAU)
2026-03-23 13:30 ` Sebastian Andrzej Siewior
2026-03-23 16:12 ` AW: " Moritz KLAMMLER (FERCHAU)
2026-03-23 20:26 ` Clark Williams
2026-03-24 18:50 ` AW: " Moritz KLAMMLER (FERCHAU)
2026-04-23 10:06 ` Sebastian Andrzej Siewior [this message]
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