Re: [PATCH 4/4] doc: watchdog: Document buddy detector

[Doug Anderson]

Hi,

On Thu, Feb 12, 2026 at 1:12 PM Mayank Rungta via B4 Relay
<devnull+mrungta.google.com@xxxxxxxxxx> wrote:
>
> From: Mayank Rungta <mrungta@xxxxxxxxxx>
>
> The current documentation generalizes the hardlockup detector as primarily
> NMI-perf-based and lacks details on the SMP "Buddy" detector.
>
> Update the documentation to add a detailed description of the Buddy
> detector, and also restructure the "Implementation" section to explicitly
> separate "Softlockup Detector", "Hardlockup Detector (NMI/Perf)", and
> "Hardlockup Detector (Buddy)".
>
> Clarify that the softlockup hrtimer acts as the heartbeat generator for
> both hardlockup mechanisms and centralize the configuration details in a
> "Frequency and Heartbeats" section.
>
> Signed-off-by: Mayank Rungta <mrungta@xxxxxxxxxx>
> ---
>  Documentation/admin-guide/lockup-watchdogs.rst | 149 +++++++++++++++++--------
>  1 file changed, 101 insertions(+), 48 deletions(-)

Thank you for updating the docs! I consider it my bug that I didn't
think to update this doc when the buddy lockup detector first landed.
I'm glad it's updated now, at least! :-)

Reviewed-by: Douglas Anderson <dianders@xxxxxxxxxxxx>