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 X-Spam-Level: X-Spam-Status: No, score=-16.8 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id B1E0FC43460 for ; Mon, 19 Apr 2021 21:50:27 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 7FB91613AA for ; Mon, 19 Apr 2021 21:50:27 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S237147AbhDSVu4 (ORCPT ); Mon, 19 Apr 2021 17:50:56 -0400 Received: from mga04.intel.com ([192.55.52.120]:61937 "EHLO mga04.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231802AbhDSVul (ORCPT ); Mon, 19 Apr 2021 17:50:41 -0400 IronPort-SDR: O3t0ISLvMzexHDSTisX0vAOFd8nT9iBvkw53iVivbh/ubR6PdX3xSzXZPlzK5dlEPcw6r5fX9e yKNGBaZOvPPw== X-IronPort-AV: E=McAfee;i="6200,9189,9959"; a="193279426" X-IronPort-AV: E=Sophos;i="5.82,235,1613462400"; d="scan'208";a="193279426" Received: from orsmga004.jf.intel.com ([10.7.209.38]) by fmsmga104.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 19 Apr 2021 14:50:11 -0700 IronPort-SDR: qQ4Ff3dbDtswGJ34r0KECI2prgBfempJBqRMw4bWpwKwdp9Xb5NVK1M6TeDB3ApdBOp9eIARY5 PHnNsyAffLBQ== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.82,235,1613462400"; d="scan'208";a="534277614" Received: from otcwcpicx3.sc.intel.com ([172.25.55.73]) by orsmga004.jf.intel.com with ESMTP; 19 Apr 2021 14:50:10 -0700 From: Fenghua Yu To: "Thomas Gleixner" , "Ingo Molnar" , "Borislav Petkov" , "Peter Zijlstra" , "Randy Dunlap" , "Tony Luck" , "Xiaoyao Li " , "Ravi V Shankar" Cc: "linux-kernel" , "x86" , Fenghua Yu Subject: [PATCH 3/4] Documentation/admin-guide: Change doc for bus lock ratelimit Date: Mon, 19 Apr 2021 21:49:57 +0000 Message-Id: <20210419214958.4035512-4-fenghua.yu@intel.com> X-Mailer: git-send-email 2.31.1 In-Reply-To: <20210419214958.4035512-1-fenghua.yu@intel.com> References: <20210419214958.4035512-1-fenghua.yu@intel.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Since bus lock rate limit changes the split_lock_detect parameter, update the documentation for the change. Signed-off-by: Fenghua Yu Reviewed-by: Tony Luck --- Documentation/admin-guide/kernel-parameters.txt | 8 ++++++++ 1 file changed, 8 insertions(+) diff --git a/Documentation/admin-guide/kernel-parameters.txt b/Documentation/admin-guide/kernel-parameters.txt index f5892896bedc..c13bbfd8c5aa 100644 --- a/Documentation/admin-guide/kernel-parameters.txt +++ b/Documentation/admin-guide/kernel-parameters.txt @@ -5154,6 +5154,14 @@ exception. Default behavior is by #AC if both features are enabled in hardware. + ratelimit:N - + Set system wide rate limit to N bus locks + per second for bus lock detection. + 0 < N <= 1000. + + N/A for split lock detection. + + If an #AC exception is hit in the kernel or in firmware (i.e. not while executing in user mode) the kernel will oops in either "warn" or "fatal" -- 2.31.1