From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from lists.ozlabs.org (lists.ozlabs.org [112.213.38.117]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 6E9D8C3ABDD for ; Mon, 19 May 2025 21:38:40 +0000 (UTC) Received: from boromir.ozlabs.org (localhost [127.0.0.1]) by lists.ozlabs.org (Postfix) with ESMTP id 4b1WHJ6yBwz3bYG; Tue, 20 May 2025 07:37:16 +1000 (AEST) Authentication-Results: lists.ozlabs.org; arc=none smtp.remote-ip="2600:3c04:e001:324:0:1991:8:25" ARC-Seal: i=1; a=rsa-sha256; d=lists.ozlabs.org; s=201707; t=1747690636; cv=none; b=E42SiXtA7kYG53dpFPo6f1dtZvUYtLdrjcDgcVCIssYkVK5h5OkE3rRz+Q3aHBwwUKshTMjTGx1sNabSJOrBGZbvpq+iZezShtGmBTtfj6P3b7hsYOMZSjpDMtUSuGzSbjQfLL37okWNUL6kLke2n/vzUZ+B2TUKOs2Q1k0PrksnL2XvNm0aYHhSw5mUDAtrCDa14ylTeuCBJ54JSmO3cAAZM+lfJ/mk8ezGWl+mC3P7PBjLGCwmmcQxm5cVpsVQdv0hQv3egiJQP1MsEN7ddTYrzUo6ZYfNmSUWn+LrXL4BIU0uo/d3lJmhyqXsjJaEpbL6R1Ti9AMBMp0V5YWRDg== ARC-Message-Signature: i=1; a=rsa-sha256; d=lists.ozlabs.org; s=201707; t=1747690636; c=relaxed/relaxed; bh=LUK0eWX7dr8omlEbgYUs13/ipUNhyzl6+g1k2OPj+a0=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=G8MflonFORJjgrPFLzFmGRXT2PqImzEDdJYRdWf0luzRvOBlZhjxxYyH4/7jeSCvKDUTWrmkAUpVe8cm/MZZ/0qAQBZSuWacj/n6LvCNFPFoDdqgG9zFKdmlG5taLLmX7tLzCa/JWAn2UFDlIg0XC3aiHyERXsPYVV0HktqaIgvBYv1Z2tLb6EPLxlZ18i+VnqLtWN3aVqaAuiAfxnoy5bp3T6MV1d9rdbug7T/TE0DLsR2AcfwYwkApV0bs9zZ5GADz7P2fz8PWgDUJ0FiH9IZbfvpOlZfY4tCNNGpo3cTZy39iiiOjb+Z8k+ijrut/bSrNAtqruaj4Ih0daQ/BuQ== ARC-Authentication-Results: i=1; lists.ozlabs.org; dmarc=pass (p=quarantine dis=none) header.from=kernel.org; dkim=pass (2048-bit key; unprotected) header.d=kernel.org header.i=@kernel.org header.a=rsa-sha256 header.s=k20201202 header.b=N0WtaEvg; dkim-atps=neutral; spf=pass (client-ip=2600:3c04:e001:324:0:1991:8:25; helo=tor.source.kernel.org; envelope-from=helgaas@kernel.org; receiver=lists.ozlabs.org) smtp.mailfrom=kernel.org Authentication-Results: lists.ozlabs.org; dmarc=pass (p=quarantine dis=none) header.from=kernel.org Authentication-Results: lists.ozlabs.org; dkim=pass (2048-bit key; unprotected) header.d=kernel.org header.i=@kernel.org header.a=rsa-sha256 header.s=k20201202 header.b=N0WtaEvg; dkim-atps=neutral Authentication-Results: lists.ozlabs.org; spf=pass (sender SPF authorized) smtp.mailfrom=kernel.org (client-ip=2600:3c04:e001:324:0:1991:8:25; helo=tor.source.kernel.org; envelope-from=helgaas@kernel.org; receiver=lists.ozlabs.org) Received: from tor.source.kernel.org (tor.source.kernel.org [IPv6:2600:3c04:e001:324:0:1991:8:25]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits)) (No client certificate requested) by lists.ozlabs.org (Postfix) with ESMTPS id 4b1WHJ3n37z30YZ for ; Tue, 20 May 2025 07:37:16 +1000 (AEST) Received: from smtp.kernel.org (transwarp.subspace.kernel.org [100.75.92.58]) by tor.source.kernel.org (Postfix) with ESMTP id B353A629F0; Mon, 19 May 2025 21:37:14 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 447FAC4CEE9; Mon, 19 May 2025 21:37:14 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1747690634; bh=909bKlpGXpejs6alzRrtkNNoVbidxfjnR8RhC93JgX0=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=N0WtaEvgXAzOSk9iDG8i/BZrjzO6AGUdr9aPPpLa2T8Ze5lwku1J0lo6iD8vdJcIy beoRBdYA6S0glwT3cdvYmet34cpc5K0od22JQ0ScSeDnVipX1eYOoy4F/gv8RKi9Ui 3wAUHYsd6CGCc36udQz7WFL8Me+OvicF9x+5I7CQLfrE8ukBB7oqEN1EjH4uY5asSG vQbCO8kxhiUNJZ7OwSpryzBcebvWZTu6O7sOWwxgWillMZwAjNURM+0TpG4HUIWiMo Hueh7xZWZ0WBB47iYJWQnPKbmpdpOjoTLwDeKvg08CCfsHqhCSaeHIb/OckfveUeNQ SXDn+SHgtYp0w== From: Bjorn Helgaas To: linux-pci@vger.kernel.org Cc: Jon Pan-Doh , Karolina Stolarek , Martin Petersen , Ben Fuller , Drew Walton , Anil Agrawal , Tony Luck , =?UTF-8?q?Ilpo=20J=C3=A4rvinen?= , Sathyanarayanan Kuppuswamy , Lukas Wunner , Jonathan Cameron , Sargun Dhillon , "Paul E . McKenney" , Mahesh J Salgaonkar , Oliver O'Halloran , Kai-Heng Feng , Keith Busch , Robert Richter , Terry Bowman , Shiju Jose , Dave Jiang , linux-kernel@vger.kernel.org, linuxppc-dev@lists.ozlabs.org, Bjorn Helgaas Subject: [PATCH v6 15/16] PCI/AER: Add ratelimits to PCI AER Documentation Date: Mon, 19 May 2025 16:35:57 -0500 Message-ID: <20250519213603.1257897-16-helgaas@kernel.org> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20250519213603.1257897-1-helgaas@kernel.org> References: <20250519213603.1257897-1-helgaas@kernel.org> X-Mailing-List: linuxppc-dev@lists.ozlabs.org List-Id: List-Help: List-Owner: List-Post: List-Archive: , List-Subscribe: , , List-Unsubscribe: Precedence: list MIME-Version: 1.0 Content-Transfer-Encoding: 8bit From: Jon Pan-Doh Add ratelimits section for rationale and defaults. Signed-off-by: Karolina Stolarek Signed-off-by: Jon Pan-Doh Signed-off-by: Bjorn Helgaas Reviewed-by: Kuppuswamy Sathyanarayanan Acked-by: Paul E. McKenney --- Documentation/PCI/pcieaer-howto.rst | 11 +++++++++++ 1 file changed, 11 insertions(+) diff --git a/Documentation/PCI/pcieaer-howto.rst b/Documentation/PCI/pcieaer-howto.rst index f013f3b27c82..896d2a232a90 100644 --- a/Documentation/PCI/pcieaer-howto.rst +++ b/Documentation/PCI/pcieaer-howto.rst @@ -85,6 +85,17 @@ In the example, 'Requester ID' means the ID of the device that sent the error message to the Root Port. Please refer to PCIe specs for other fields. +AER Ratelimits +-------------- + +Since error messages can be generated for each transaction, we may see +large volumes of errors reported. To prevent spammy devices from flooding +the console/stalling execution, messages are throttled by device and error +type (correctable vs. uncorrectable). + +AER uses the default ratelimit of DEFAULT_RATELIMIT_BURST (10 events) over +DEFAULT_RATELIMIT_INTERVAL (5 seconds). + AER Statistics / Counters ------------------------- -- 2.43.0