linux-kernel - Re: [v4 PATCH 2/2] hung_task: Enable runtime reset of hung_task_detect

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Message-ID: <ns5suocv4rhtqfz2spetk373sdi5wp2ygsnuphe7krdffikgmb@tjuhqnrxfjfu>
Date: Mon, 22 Dec 2025 20:27:21 -0500
From: Aaron Tomlin <atomlin@...mlin.com>
To: Lance Yang <lance.yang@...ux.dev>
Cc: sean@...e.io, linux-kernel@...r.kernel.org, pmladek@...e.com, 
	joel.granados@...nel.org, gregkh@...uxfoundation.org, akpm@...ux-foundation.org, 
	mhiramat@...nel.org
Subject: Re: [v4 PATCH 2/2] hung_task: Enable runtime reset of
 hung_task_detect_count

On Mon, Dec 22, 2025 at 10:21:31AM +0800, Lance Yang wrote:
> Hmm, I think we're missing the same underflow check here ...
> 
> If reset happens mid-scan, it can also underflow and cause
> false positives in the diagnostics :)
> 
> we should apply the same "if (current < prev) use current" logic
> here as Petr metioned before.

Hi Lance,

You are quite right; that was an oversight on my part. The underflow check
was indeed omitted in error.


Kind regards,
-- 
Aaron Tomlin

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