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Message-ID: <e6232bb4-a8e5-8f33-e80e-06b1356565b7@infradead.org>
Date:   Wed, 13 Jul 2022 13:17:29 -0700
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Subject: Re: [PATCH v5 4/4] pseries/mobility: set NMI watchdog factor during
 an LPM
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To:     Laurent Dufour <ldufour@linux.ibm.com>, mpe@ellerman.id.au,
        npiggin@gmail.com, christophe.leroy@csgroup.eu,
        wim@linux-watchdog.org, linux@roeck-us.net, nathanl@linux.ibm.com
Cc:     haren@linux.vnet.ibm.com, hch@infradead.org,
        linux-kernel@vger.kernel.org, linuxppc-dev@lists.ozlabs.org,
        linux-watchdog@vger.kernel.org
References: <20220713154729.80789-1-ldufour@linux.ibm.com>
 <20220713154729.80789-5-ldufour@linux.ibm.com>
From:   Randy Dunlap <rdunlap@infradead.org>
In-Reply-To: <20220713154729.80789-5-ldufour@linux.ibm.com>
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Hi Laurent,

On 7/13/22 08:47, Laurent Dufour wrote:
> diff --git a/Documentation/admin-guide/sysctl/kernel.rst b/Documentation/admin-guide/sysctl/kernel.rst
> index ddccd1077462..d73faa619c15 100644
> --- a/Documentation/admin-guide/sysctl/kernel.rst
> +++ b/Documentation/admin-guide/sysctl/kernel.rst
> @@ -592,6 +592,18 @@ to the guest kernel command line (see
>  Documentation/admin-guide/kernel-parameters.rst).
>  
>  
> +nmi_wd_lpm_factor (PPC only)
> +============================
> +
> +Factor apply to the NMI watchdog timeout (only when ``nmi_watchdog`` is

   Factor to apply to

> +set to 1). This factor represents the percentage added to
> +``watchdog_thresh`` when calculating the NMI watchdog timeout during an
> +LPM. The soft lockup timeout is not impacted.
> +
> +A value of 0 means no change. The default value is 200 meaning the NMI
> +watchdog is set to 30s (based on ``watchdog_thresh`` equal to 10).

-- 
~Randy