linux-kernel - Re: [REGRESSION] ? system is stuck in clocksource, >60s delay at boot time without tsc=unstable

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Message-ID: <87eczlg6ls.ffs@tglx>
Date: Tue, 25 Feb 2025 20:35:43 +0100
From: Thomas Gleixner <tglx@...utronix.de>
To: Fab Stz <fabstz-it@...oo.fr>, John Stultz <jstultz@...gle.com>
Cc: Daniel Lezcano <daniel.lezcano@...aro.org>, Anna-Maria Behnsen
 <anna-maria@...utronix.de>, Frederic Weisbecker <frederic@...nel.org>,
 linux-kernel@...r.kernel.org, linux-pm@...r.kernel.org, Jacob Pan
 <jacob.jun.pan@...ux.intel.com>, Len Brown <lenb@...nel.org>, "Rafael J.
 Wysocki" <rafael@...nel.org>
Subject: Re: [REGRESSION] ? system is stuck in clocksource, >60s delay at
 boot time without tsc=unstable

On Tue, Feb 25 2025 at 09:11, Fab Stz wrote:
> Thank you for the patch! I built the 6.1 kernel with it applied and it 
> apparently works as expected (no delay). Please find logs below & 
> attached dmesg log. Maybe the interesting line is:
>
> Feb 25 08:53:51 debian kernel: tsc: Marking TSC unstable due to TSC 
> halts in idle

Correct. That's the missing piece.

> Will the patch also enter the longterm releases like 6.1?

Let me write a proper change log with a Fixes tag and cc stable, so it
will be automatically picked up.

Thanks,

        tglx