linux-kernel - Re: clocksource: Reduce watchdog readout delay limit to prevent false positives

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Message-ID: <87qzspa6pk.ffs@tglx>
Date: Sat, 20 Dec 2025 09:38:31 +0100
From: Thomas Gleixner <tglx@...utronix.de>
To: paulmck@...nel.org
Cc: LKML <linux-kernel@...r.kernel.org>, Daniel J Blueman
 <daniel@...ra.org>, John Stultz <jstultz@...gle.com>, Waiman Long
 <longman@...hat.com>, Peter Zijlstra <peterz@...radead.org>, Dave Hansen
 <dave.hansen@...ux.intel.com>, Tony Luck <tony.luck@...el.com>, Borislav
 Petkov <bp@...en8.de>, Stephen Boyd <sboyd@...nel.org>, Scott Hamilton
 <scott.hamilton@...den.com>
Subject: Re: clocksource: Reduce watchdog readout delay limit to prevent
 false positives

On Fri, Dec 19 2025 at 16:18, Paul E. McKenney wrote:
> One might naively hope that the HPETs in a given system could synchronize
> themselves so that each CPU could read the HPET nearest it instead of
> everyone reading CPU 0's HPET.  Or that some other means would allow
> reasonable access times.  Hey, I can dream, can't I?

Sounds more like a nightmare TBH.