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=-12.6 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,FREEMAIL_FORGED_FROMDOMAIN,FREEMAIL_FROM, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY, SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT autolearn=unavailable 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 A4A6AC388F9 for ; Thu, 22 Oct 2020 05:56:53 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 393BE21775 for ; Thu, 22 Oct 2020 05:56:53 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b="tQUSUi8V" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2508118AbgJVF4w (ORCPT ); Thu, 22 Oct 2020 01:56:52 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:38848 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2508109AbgJVF4v (ORCPT ); Thu, 22 Oct 2020 01:56:51 -0400 Received: from mail-pg1-x542.google.com (mail-pg1-x542.google.com [IPv6:2607:f8b0:4864:20::542]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 706D4C0613CE; Wed, 21 Oct 2020 22:56:51 -0700 (PDT) Received: by mail-pg1-x542.google.com with SMTP id f38so8890pgm.2; Wed, 21 Oct 2020 22:56:51 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=from:to:cc:subject:date:message-id:in-reply-to:references; bh=sWOuB16AvGHTkHw6KRpIhtSX/WjKIiIbZR5t/2RTblQ=; b=tQUSUi8V5OE8/U5C0n/9jTHq7ebXMsPegcM+dRWzsnTYSn9FHHzirtrt1Plk0mulTc ga5uUod0Si9tGY1wP49Psu62N1vCjeOkhfdujanU7KhgeppYE7b86Frqxpbqi7q69Ip/ X4k1wiMFVLLdEbxoLvbburGYZa9mDOsMb3SmhpsNK+hMtKgOwxoV8B73nPZfXEnti0XP PgcWRR0qfbjm9DQheISTjJbQLKx3frinMh5vksKOy1yASvCtgZ8mowgFL43/ixyezAiA Xp0jXDwros3LOz3rYtdAODDm/2kvngIy1sUgtjVKEkly/vHwK8jDbir6IrM1qRED4GJp lWSQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references; bh=sWOuB16AvGHTkHw6KRpIhtSX/WjKIiIbZR5t/2RTblQ=; b=gvcdAkWagPKDRIgyhcCGzAww7XpGUy+Az25zYqDocvx1LLNI8NPFjmBbwr0bR1NUAy uC2PH+6MOFcPZ+FVYgYdtYY/MyVcfc/12gmjKyZ3MyhaxEO1WzCiBkuUXKiuqMfN2KA1 36a10KbM2GZYmMa1mMZGjHxhfn1OdW9d2PG/B+xT1P56MvKsOmc8681O/rMJ/vq4Ks9C zKX4PvjooGzK4PNVL43Xjy1qfc8PK3JPnnB+dtkDfE1ZomVP72LArYXxgVqG6d/KysuC acTXAzIUQzsJ5zekBQklIPi0NaSdzbWKq0a7aTAFWGTUKodFDzXiXo3ZQzt0TtFR7gI/ Dk6w== X-Gm-Message-State: AOAM532MtOwuXsoB/roYwMEaCoEtc+Uq14zDKwOLJRn/j8oNVcbD4iLF uYZsneMq2tV0FSQJr6QT4dLjdHRGKQ== X-Google-Smtp-Source: ABdhPJxZfFauT3BfGs3U+kT20nZ/roX+l+EaGF10Wt8pdIq0lYDnd+ybv8xfhMUczwOL7PWfnTaiAA== X-Received: by 2002:a63:d252:: with SMTP id t18mr860263pgi.300.1603346210883; Wed, 21 Oct 2020 22:56:50 -0700 (PDT) Received: from mylaptop.redhat.com ([209.132.188.80]) by smtp.gmail.com with ESMTPSA id c12sm830995pgi.14.2020.10.21.22.56.43 (version=TLS1_2 cipher=ECDHE-ECDSA-AES128-GCM-SHA256 bits=128/128); Wed, 21 Oct 2020 22:56:50 -0700 (PDT) From: Pingfan Liu To: linux-kernel@vger.kernel.org Cc: Pingfan Liu , Thomas Gleixner , Peter Zijlstra , Jisheng Zhang , Andrew Morton , "Guilherme G. Piccoli" , Petr Mladek , Marc Zyngier , Linus Walleij , afzal mohammed , Lina Iyer , "Gustavo A. R. Silva" , Maulik Shah , Al Viro , Jonathan Corbet , Pawan Gupta , Mike Kravetz , Oliver Neukum , linux-doc@vger.kernel.org, kexec@lists.infradead.org Subject: [PATCH 3/3] Documentation: introduce a param "irqflood_suppress" Date: Thu, 22 Oct 2020 13:56:03 +0800 Message-Id: <1603346163-21645-4-git-send-email-kernelfans@gmail.com> X-Mailer: git-send-email 2.7.5 In-Reply-To: <1603346163-21645-1-git-send-email-kernelfans@gmail.com> References: <1603346163-21645-1-git-send-email-kernelfans@gmail.com> Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org The param "irqflood_suppress" is helpful for capture kernel to survive irq flood. Signed-off-by: Pingfan Liu Cc: Thomas Gleixner Cc: Peter Zijlstra Cc: Jisheng Zhang Cc: Andrew Morton Cc: "Guilherme G. Piccoli" Cc: Petr Mladek Cc: Marc Zyngier Cc: Linus Walleij Cc: afzal mohammed Cc: Lina Iyer Cc: "Gustavo A. R. Silva" Cc: Maulik Shah Cc: Al Viro Cc: Jonathan Corbet Cc: Pawan Gupta Cc: Mike Kravetz Cc: Oliver Neukum To: linux-kernel@vger.kernel.org Cc: linux-doc@vger.kernel.org Cc: kexec@lists.infradead.org --- Documentation/admin-guide/kernel-parameters.txt | 3 +++ 1 file changed, 3 insertions(+) diff --git a/Documentation/admin-guide/kernel-parameters.txt b/Documentation/admin-guide/kernel-parameters.txt index a106874..0a25a05 100644 --- a/Documentation/admin-guide/kernel-parameters.txt +++ b/Documentation/admin-guide/kernel-parameters.txt @@ -2009,6 +2009,9 @@ for it. Also check all handlers each timer interrupt. Intended to get systems with badly broken firmware running. + irqflood_suppress [HW] + When a irq fully occupies a cpu in a long time, suppressing + it to make kernel move on. It is useful in the capture kernel. isapnp= [ISAPNP] Format: ,,, -- 2.7.5