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From: Pingfan Liu <kernelfans@gmail.com>
Subject: [PATCH 3/3] Documentation: introduce a param "irqflood_suppress"
Date: Thu, 22 Oct 2020 13:56:03 +0800
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To: linux-kernel@vger.kernel.org
Cc: Maulik Shah <mkshah@codeaurora.org>, Petr Mladek <pmladek@suse.com>, Oliver Neukum <oneukum@suse.com>, "Gustavo A. R. Silva" <gustavo@embeddedor.com>, Peter Zijlstra <peterz@infradead.org>, Marc Zyngier <maz@kernel.org>, Linus Walleij <linus.walleij@linaro.org>, "Guilherme G. Piccoli" <gpiccoli@canonical.com>, linux-doc@vger.kernel.org, Jonathan Corbet <corbet@lwn.net>, Pingfan Liu <kernelfans@gmail.com>, Jisheng Zhang <Jisheng.Zhang@synaptics.com>, Pawan Gupta <pawan.kumar.gupta@linux.intel.com>, Lina Iyer <ilina@codeaurora.org>, kexec@lists.infradead.org, Thomas Gleixner <tglx@linutronix.de>, Mike Kravetz <mike.kravetz@oracle.com>, afzal mohammed <afzal.mohd.ma@gmail.com>, Andrew Morton <akpm@linux-foundation.org>, Al Viro <viro@zeniv.linux.org.uk>

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

Signed-off-by: Pingfan Liu <kernelfans@gmail.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Jisheng Zhang <Jisheng.Zhang@synaptics.com>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: "Guilherme G. Piccoli" <gpiccoli@canonical.com>
Cc: Petr Mladek <pmladek@suse.com>
Cc: Marc Zyngier <maz@kernel.org>
Cc: Linus Walleij <linus.walleij@linaro.org>
Cc: afzal mohammed <afzal.mohd.ma@gmail.com>
Cc: Lina Iyer <ilina@codeaurora.org>
Cc: "Gustavo A. R. Silva" <gustavo@embeddedor.com>
Cc: Maulik Shah <mkshah@codeaurora.org>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Cc: Jonathan Corbet <corbet@lwn.net>
Cc: Pawan Gupta <pawan.kumar.gupta@linux.intel.com>
Cc: Mike Kravetz <mike.kravetz@oracle.com>
Cc: Oliver Neukum <oneukum@suse.com>
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: <RDP>,<reset>,<pci_scan>,<verbosity>
-- 
2.7.5


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