linux-kernel - Re: [PATCH v5 4/4] pseries/mobility: set NMI watchdog factor during an LPM

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Date:   Mon, 25 Jul 2022 14:25:07 +0200
From:   Laurent Dufour <ldufour@...ux.ibm.com>
To:     Randy Dunlap <rdunlap@...radead.org>, mpe@...erman.id.au,
        npiggin@...il.com, christophe.leroy@...roup.eu,
        wim@...ux-watchdog.org, linux@...ck-us.net, nathanl@...ux.ibm.com
Cc:     haren@...ux.vnet.ibm.com, hch@...radead.org,
        linux-kernel@...r.kernel.org, linuxppc-dev@...ts.ozlabs.org,
        linux-watchdog@...r.kernel.org
Subject: Re: [PATCH v5 4/4] pseries/mobility: set NMI watchdog factor during
 an LPM

Le 13/07/2022 à 22:17, Randy Dunlap a écrit :
> 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

Thanks, Randy.

Michael, could you fix that when applying the series?

Cheers,
Laurent

> 
>> +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).
>