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Commit 334bb79c authored by Pranith Kumar's avatar Pranith Kumar Committed by Jonathan Corbet
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doc: Clarify that nmi_watchdog param is for hardlockups 



The kernel NMI watchdog acts as both a hardlockup and softlockup detector.
However, the kernel parameter nmi_watchdog can only enable or disable the
hardlockup detector. Clarify that in the documentation.

Signed-off-by: default avatarPranith Kumar <bobby.prani@gmail.com>
Signed-off-by: default avatarJonathan Corbet <corbet@lwn.net>
parent 0ea1563b

Documentation/kernel-parameters.txt

+4 −3
Original line number Diff line number Diff line
@@ -2320,11 +2320,12 @@ bytes respectively. Such letter suffixes can also be entirely omitted. 
	nmi_watchdog=	[KNL,BUGS=X86] Debugging features for SMP kernels

			Format: [panic,][nopanic,][num]

			Valid num: 0 or 1

			0 - turn nmi_watchdog off

			1 - turn nmi_watchdog on

			0 - turn hardlockup detector in nmi_watchdog off

			1 - turn hardlockup detector in nmi_watchdog on

			When panic is specified, panic when an NMI watchdog

			timeout occurs (or 'nopanic' to override the opposite

			default).

			default). To disable both hard and soft lockup detectors,

			please see 'nowatchdog'.

			This is useful when you use a panic=... timeout and

			need the box quickly up again.