linux-kernel - [PATCH 3/3] Documentation: introduce a param "irqflood

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Date:   Thu, 22 Oct 2020 13:56:03 +0800
From:   Pingfan Liu <kernelfans@...il.com>
To:     linux-kernel@...r.kernel.org
Cc:     Pingfan Liu <kernelfans@...il.com>,
        Thomas Gleixner <tglx@...utronix.de>,
        Peter Zijlstra <peterz@...radead.org>,
        Jisheng Zhang <Jisheng.Zhang@...aptics.com>,
        Andrew Morton <akpm@...ux-foundation.org>,
        "Guilherme G. Piccoli" <gpiccoli@...onical.com>,
        Petr Mladek <pmladek@...e.com>, Marc Zyngier <maz@...nel.org>,
        Linus Walleij <linus.walleij@...aro.org>,
        afzal mohammed <afzal.mohd.ma@...il.com>,
        Lina Iyer <ilina@...eaurora.org>,
        "Gustavo A. R. Silva" <gustavo@...eddedor.com>,
        Maulik Shah <mkshah@...eaurora.org>,
        Al Viro <viro@...iv.linux.org.uk>,
        Jonathan Corbet <corbet@....net>,
        Pawan Gupta <pawan.kumar.gupta@...ux.intel.com>,
        Mike Kravetz <mike.kravetz@...cle.com>,
        Oliver Neukum <oneukum@...e.com>, linux-doc@...r.kernel.org,
        kexec@...ts.infradead.org
Subject: [PATCH 3/3] Documentation: introduce a param "irqflood_suppress"

The param "irqflood_suppress" is helpful for capture kernel to survive irq
flood.

Signed-off-by: Pingfan Liu <kernelfans@...il.com>
Cc: Thomas Gleixner <tglx@...utronix.de>
Cc: Peter Zijlstra <peterz@...radead.org>
Cc: Jisheng Zhang <Jisheng.Zhang@...aptics.com>
Cc: Andrew Morton <akpm@...ux-foundation.org>
Cc: "Guilherme G. Piccoli" <gpiccoli@...onical.com>
Cc: Petr Mladek <pmladek@...e.com>
Cc: Marc Zyngier <maz@...nel.org>
Cc: Linus Walleij <linus.walleij@...aro.org>
Cc: afzal mohammed <afzal.mohd.ma@...il.com>
Cc: Lina Iyer <ilina@...eaurora.org>
Cc: "Gustavo A. R. Silva" <gustavo@...eddedor.com>
Cc: Maulik Shah <mkshah@...eaurora.org>
Cc: Al Viro <viro@...iv.linux.org.uk>
Cc: Jonathan Corbet <corbet@....net>
Cc: Pawan Gupta <pawan.kumar.gupta@...ux.intel.com>
Cc: Mike Kravetz <mike.kravetz@...cle.com>
Cc: Oliver Neukum <oneukum@...e.com>
To: linux-kernel@...r.kernel.org
Cc: linux-doc@...r.kernel.org
Cc: kexec@...ts.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: <RDP>,<reset>,<pci_scan>,<verbosity>
-- 
2.7.5