linux-kernel - Re: [PATCH 2/2] hpet: Add HPET-based NMI watchdog support

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Message-ID: <87cy2l363t.ffs@tglx>
Date: Tue, 03 Feb 2026 21:49:26 +0100
From: Thomas Gleixner <tglx@...nel.org>
To: Ricardo Neri <ricardo.neri-calderon@...ux.intel.com>
Cc: Alexander Graf <graf@...zon.com>, x86@...nel.org,
 linux-kernel@...r.kernel.org, linux-doc@...r.kernel.org, Clemens Ladisch
 <clemens@...isch.de>, Arnd Bergmann <arnd@...db.de>, Greg Kroah-Hartman
 <gregkh@...uxfoundation.org>, Dave Hansen <dave.hansen@...ux.intel.com>,
 Borislav Petkov <bp@...en8.de>, Ingo Molnar <mingo@...hat.com>, Jonathan
 Corbet <corbet@....net>, Paolo Bonzini <pbonzini@...hat.com>, Pasha
 Tatashin <pasha.tatashin@...een.com>, nh-open-source@...zon.com, Nicolas
 Saenz Julienne <nsaenz@...zon.es>, Hendrik Borghorst <hborghor@...zon.de>,
 Filippo Sironi <sironi@...zon.de>, David Woodhouse <dwmw@...zon.co.uk>,
 Jan Schönherr <jschoenh@...zon.de>, Sasha Levin
 <sashal@...nel.org>
Subject: Re: [PATCH 2/2] hpet: Add HPET-based NMI watchdog support

On Tue, Feb 03 2026 at 11:44, Ricardo Neri wrote:
> On Tue, Feb 03, 2026 at 04:28:11PM +0100, Thomas Gleixner wrote:
>> I don't remember. That thing clearly fell through the cracks.
>
> My impression at the time was that the buddy hardlockup detector met the
> goal of freeing the PMU counter and there was little interest on using the
> HPET.
>
>> Let me find it again and reply to that.
>
> Does this mean that there is renewed interest for this?

It seems Alex is interrested and the code minus the rejects and my
todays suggestion looks palatable.