[PATCH 3/3] Documentation: introduce a param "irqflood_suppress"

Pingfan Liu kernelfans at gmail.com
Thu Oct 22 01:56:03 EDT 2020

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

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

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