From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 255B31A5BA0; Mon, 4 Aug 2025 11:00:27 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1754305228; cv=none; b=tp4+1MqWRLvarEt5B8RXp9NHCPRQnG6+0nJI1EmSHO2lptygopgiQAEKE8uNJEeUXUvDTfO9UAWf2SAAAhqKjiQtePDtJh3CWyopmcdbhj4JVsMYsKFPRXZ/CfG/ZIUsXOk071ZOXVZ7CXzfkhSh0fYJFi5WI3FNBm8iQ3uHvJM= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1754305228; c=relaxed/simple; bh=3H2sMPjyHVMcQ2JCrtybSld9zzsH446LmW1UBTHqG+c=; h=Message-ID:Date:MIME-Version:Subject:To:Cc:References:From: In-Reply-To:Content-Type; b=icbSRF3NuVYPH8YjQu94weUfvAEAvPOsRRaqRkT37aTP4Oxws+vxfjOK6tilROpb1TkmFiHTYXU52Nna1aCuAOzIb4ZrN4Jo9822TLsLbRZD4aVyvxTbereER0u6PPMcc+U1jsixzjxNvH+YT+qk05UaBtBCeieIiIbymoDJsqE= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=sCmvCc8D; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="sCmvCc8D" Received: by smtp.kernel.org (Postfix) with ESMTPSA id AE045C4CEE7; Mon, 4 Aug 2025 11:00:24 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1754305227; bh=3H2sMPjyHVMcQ2JCrtybSld9zzsH446LmW1UBTHqG+c=; h=Date:Subject:To:Cc:References:From:In-Reply-To:From; b=sCmvCc8DY3XLXOLDdQZsebkYJ9t+vgGLX1d3Mes5prass9M2yyFwdzp6Yk46fOgpS 8G1kdbFxIeZijD7tpmy4+FqL6Yi+6Pbv/TZIHmUhSDuFPNZ9twLrpx/Lbev7iIZszd tCDELx63FMUi7Q9VfT+8Z20x63XA2lKluPDPrdoYeXzZ7gUnM3qIxLIUSnVFh5cAjJ hfEshOHqEbqX/jzCg5AWfaZntVW4dv37m83XXv27gIT0q/MLIgGmDCd+0stAn7Imuc /sRC5bli1Bo3J/yTHRpM3JZN3u9rCEvlqRflzF12kD9oFG3hVod6xzvfXkxMB0RRX8 JQw8+QdKf4Kyg== Message-ID: Date: Mon, 4 Aug 2025 13:00:22 +0200 Precedence: bulk X-Mailing-List: linux-doc@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH v5] genirq: add support for warning on long-running IRQ handlers To: Wladislav Wiebe , tglx@linutronix.de, corbet@lwn.net, jirislaby@kernel.org Cc: akpm@linux-foundation.org, paulmck@kernel.org, rostedt@goodmis.org, Neeraj.Upadhyay@amd.com, david@redhat.com, bp@alien8.de, arnd@arndb.de, fvdl@google.com, linux-doc@vger.kernel.org, linux-kernel@vger.kernel.org, peterz@infradead.org References: <20250804093525.851-1-wladislav.wiebe@nokia.com> Content-Language: en-US From: Jiri Slaby Autocrypt: addr=jirislaby@kernel.org; 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charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit On 04. 08. 25, 11:35, Wladislav Wiebe wrote: > Introduce a mechanism to detect and warn about prolonged IRQ handlers. > With a new command-line parameter (irqhandler.duration_warn_us=), > users can configure the duration threshold in microseconds when a warning > in such format should be emitted: > > "[CPU14] long duration of IRQ[159:bad_irq_handler [long_irq]], took: 1330 us" > > The implementation uses local_clock() to measure the execution duration of the > generic IRQ per-CPU event handler. Reviewed-by: Jiri Slaby -- js suse labs