From: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
To: Bert Karwatzki <spasswolf@web.de>
Cc: Tejun Heo <tj@kernel.org>, Thomas Gleixner <tglx@linutronix.de>,
calvin@wbinvd.org, dschatzberg@meta.com, peterz@infradead.org,
linux-kernel@vger.kernel.org, linux-rt-devel@lists.linux.dev
Subject: Re: ~90s reboot delay with v6.19 and PREEMPT_RT
Date: Wed, 25 Feb 2026 16:43:41 +0100 [thread overview]
Message-ID: <20260225154341.32AjXoVi@linutronix.de> (raw)
In-Reply-To: <20260219164648.3014-1-spasswolf@web.de>
On 2026-02-19 17:46:47 [+0100], Bert Karwatzki wrote:
> Since linux v6.19 I noticed that rebooting my MSI Alpha 15 Laptop
> would hang for about ~90s before rebooting. I bisected this (from
> v6.18 to v6.19) and got this as the first bad commit:
> 9311e6c29b34 ("cgroup: Fix sleeping from invalid context warning on PREEMPT_RT")
…
I'm on it. I looks like we free the task after sched_process_wait() but
before it is entirely gone there is a wait() on its pid. Some of them do
come back but one seems to be stuck and I need to figure out which one.
If we get rid of the LAZY then it happens "quick" enough so it works.
> Bert Karwatzki
Sebastian
next prev parent reply other threads:[~2026-02-25 15:43 UTC|newest]
Thread overview: 24+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <aQufmyZ7X7NdfiCL@slm.duckdns.org>
2026-02-19 16:46 ` ~90s reboot delay with v6.19 and PREEMPT_RT Bert Karwatzki
2026-02-19 20:53 ` Calvin Owens
2026-02-19 23:10 ` Bert Karwatzki
2026-02-20 0:58 ` Steven Rostedt
2026-02-20 9:15 ` ~90s shutdown " Bert Karwatzki
2026-02-20 15:44 ` Steven Rostedt
2026-02-23 0:35 ` Bert Karwatzki
2026-02-23 8:22 ` Steven Rostedt
2026-02-23 13:36 ` Bert Karwatzki
2026-02-23 23:36 ` Bert Karwatzki
2026-02-24 12:44 ` Bert Karwatzki
2026-02-24 12:58 ` Bert Karwatzki
2026-02-24 14:20 ` Steven Rostedt
2026-02-24 15:45 ` ~90s reboot " Sebastian Andrzej Siewior
2026-02-25 15:43 ` Sebastian Andrzej Siewior [this message]
2026-02-25 16:37 ` Bert Karwatzki
2026-02-25 16:59 ` Sebastian Andrzej Siewior
2026-02-25 22:31 ` Sebastian Andrzej Siewior
2026-02-26 13:24 ` Bert Karwatzki
2026-02-26 13:46 ` Sebastian Andrzej Siewior
2026-02-26 16:37 ` Steven Rostedt
2026-02-27 14:13 ` Sebastian Andrzej Siewior
2026-02-27 22:57 ` Bert Karwatzki
2026-03-02 11:15 ` Sebastian Andrzej Siewior
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