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Fri, 23 Oct 2026 08:46:00 -0700 (PDT) Received: from pathway.suse.cz ([176.114.240.130]) by smtp.gmail.com with ESMTPSA id ffacd0b85a97d-48e3d40e830sm564857f8f.35.2026.10.23.08.45.59 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 23 Oct 2026 08:46:00 -0700 (PDT) Date: Fri, 23 Oct 2026 17:45:57 +0200 From: Petr Mladek To: Aaron Tomlin Cc: akpm@linux-foundation.org, lance.yang@linux.dev, mhiramat@kernel.org, linux-kernel@vger.kernel.org, david.laight.linux@gmail.com, brads@mainlining.org, neelx@suse.com, sean@ashe.io, chjohnst@gmail.com, steve@abita.co, mproche@gmail.com, nick.lange@gmail.com Subject: Re: [PATCH v11 1/2] hung_task: Reset warning budget when problem gets resolved Message-ID: References: <20261004163610.413506-1-atomlin@atomlin.com> <20261004163610.413506-2-atomlin@atomlin.com> X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Post: List-Help: List-Subscribe: List-Unsubscribe: List-Owner: Precedence: list MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20261004163610.413506-2-atomlin@atomlin.com> On Sun 2026-10-04 12:36:09, Aaron Tomlin wrote: > The sysctl hung_task_warnings currently holds both the configured warning > limit and the remaining budget. Each detailed report decrements the > sysctl, so once it reaches zero, the configured limit is lost and cannot > be restored automatically. > > Keep sysctl_hung_task_warnings as the configured warning limit and make > khungtaskd the sole owner of the remaining budget. A check that finds no > hung tasks reloads the budget directly from the configured limit. A > successful sysctl write publishes an atomic reset request, which > khungtaskd consumes at the start of the next check. > > Suggested-by: Petr Mladek > Suggested-by: Lance Yang > Tested-by: Lance Yang > Reviewed-by: Lance Yang > Signed-off-by: Aaron Tomlin Just for record, the patch looks good to me: Reviewed-by: Petr Mladek Best Regards, Petr