linux-kernel - Re: [PATCH v3] doc: kernel-parameters.txt: fix documentation of nmi

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Message-ID: <20190523143703.2fb71f71@gandalf.local.home>
Date:   Thu, 23 May 2019 14:37:03 -0400
From:   Steven Rostedt <rostedt@...dmis.org>
To:     Zhenzhong Duan <zhenzhong.duan@...cle.com>, corbet@....net
Cc:     linux-kernel@...r.kernel.org, linux-doc@...r.kernel.org,
        paulmck@...ux.ibm.com, josh@...htriplett.org,
        mathieu.desnoyers@...icios.com, jiangshanlai@...il.com,
        joel@...lfernandes.org, tglx@...utronix.de, mingo@...nel.org,
        gregkh@...uxfoundation.org, keescook@...omium.org,
        srinivas.eeda@...cle.com
Subject: Re: [PATCH v3] doc: kernel-parameters.txt: fix documentation of
 nmi_watchdog parameter

On Tue, 21 May 2019 10:32:08 +0800
Zhenzhong Duan <zhenzhong.duan@...cle.com> wrote:

> The default behavior of hardlockup depends on the config of
> CONFIG_BOOTPARAM_HARDLOCKUP_PANIC.
> 

Jon,

You want to take this in your tree?

-- Steve

> Fix the description of nmi_watchdog to make it clear.
> 
> Suggested-by: Steven Rostedt (VMware) <rostedt@...dmis.org>
> Signed-off-by: Zhenzhong Duan <zhenzhong.duan@...cle.com>
> Reviewed-by: Joel Fernandes (Google) <joel@...lfernandes.org>
> Acked-by: Ingo Molnar <mingo@...nel.org>
> Acked-by: Steven Rostedt (VMware) <rostedt@...dmis.org>
> Cc: Thomas Gleixner <tglx@...utronix.de>
> Cc: Kees Cook <keescook@...omium.org>
> Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
> Cc: linux-doc@...r.kernel.org
> ---
>  v3: add Suggested-by and Acked-by
>  v2: fix description using words suggested by Steven Rostedt
> 
>  Documentation/admin-guide/kernel-parameters.txt | 5 +++--
>  1 file changed, 3 insertions(+), 2 deletions(-)
> 
> diff --git a/Documentation/admin-guide/kernel-parameters.txt b/Documentation/admin-guide/kernel-parameters.txt
> index 08df588..b9d4358 100644
> --- a/Documentation/admin-guide/kernel-parameters.txt
> +++ b/Documentation/admin-guide/kernel-parameters.txt
> @@ -2805,8 +2805,9 @@
>  			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). To disable both hard and soft lockup detectors,
> +			timeout occurs (or 'nopanic' to not panic on an NMI
> +			watchdog, if CONFIG_BOOTPARAM_HARDLOCKUP_PANIC is set)
> +			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.