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 B80DF1C5F27; Thu, 7 Aug 2025 05:15:44 +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=1754543744; cv=none; b=sTY6FED3f1fYc6ffNuhznQ2Z9WyxlxPXP7R7q/NOX+cFtTFWgTnnZRod+/pYYXK2fzuyJZ/D9bbn2mfoLN+TJ13OqgsQEgy6H3B+TRfHX9xmz9zw37/WBOu4wdxN13izaeEeKKF3nUKaPMamw9+kP74ysE8z9smVbpwm3LluoOw= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1754543744; c=relaxed/simple; bh=E02Aj5EQepLu9AzkfD7zyC/ZazyUIRA04m+VFrjcY2Y=; h=Message-ID:Date:MIME-Version:Subject:To:Cc:References:From: In-Reply-To:Content-Type; b=BBfdAgbn9N9GrRNW3ZeSgIK2tlvliZa85eTc2ozRiRxGdUb0vVo7FjpgrPN5t9JbR3uUhq97Uoewht/fehazB1ZgHBsrzNuDqocq8TnCNcbtpl73jhoq/PuIryyi4RTapRh5C4P6YRSeuukQzySL4C/j9DFGHy11BsSCcGgwQZU= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=ptI1l/OT; 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="ptI1l/OT" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 77951C4CEED; Thu, 7 Aug 2025 05:15:41 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1754543744; bh=E02Aj5EQepLu9AzkfD7zyC/ZazyUIRA04m+VFrjcY2Y=; h=Date:Subject:To:Cc:References:From:In-Reply-To:From; b=ptI1l/OTKWAbn9QA0oqE0DooXqa38R6DVMSt3zQjeAiC4V7RhYiIW7q5eBZbK6bgw bDS208OPGN3+wW4rX+SLzGoGLqPRUTjUlonhrY+VjDp1qDGRcFh31tCRaPRnY1bwkL SKogCYQa29cbZY4Nbp6O94AwM6O1IbYkxerqRy21U5QW22NwOZggo0Z0LxtS3GTMws R+CENeDw6+O/2yI6wz2k0ZCkEGUb1Zxum60D8eUZi5mRLmIAzme481FJB1dfNG8fmg tISFo8uHZuvNdXL2kMTyD+Y8cpAobz0Lf9sfdRY2P+vE20Sl7o6AfHyjF2pfOTD3LY lKIVEGe1angmw== Message-ID: <8fa90e41-53d1-4060-a077-6bf2807e0820@kernel.org> Date: Thu, 7 Aug 2025 07:15:39 +0200 Precedence: bulk X-Mailing-List: linux-kernel@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 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. > > Signed-off-by: Wladislav Wiebe OK: Reviewed-by: Jiri Slaby -- js suse labs