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From: Jiri Slaby <>
To: Curtis Klein <>,,
Subject: Re: [PATCH v3] watchdog: Add hrtimer-based pretimeout feature
Date: Thu, 2 Sep 2021 08:55:37 +0200	[thread overview]
Message-ID: <> (raw)
In-Reply-To: <>

On 03. 02. 21, 21:11, Curtis Klein wrote:
> This adds the option to use a hrtimer to generate a watchdog pretimeout
> event for hardware watchdogs that do not natively support watchdog
> pretimeouts.
> With this enabled, all watchdogs will appear to have pretimeout support
> in userspace. If no pretimeout value is set, there will be no change in
> the watchdog's behavior.


on my Dell Latitude 7280, CONFIG_WATCHDOG_HRTIMER_PRETIMEOUT=y causes 
all reboot, kexec, suspend to panic. Disabling that option makes it all 
work again. Provided it happens very late in the process, I don't know 
how to grab some logs...

Any ideas?

> --- a/drivers/watchdog/Kconfig
> +++ b/drivers/watchdog/Kconfig
> @@ -73,6 +73,14 @@ config WATCHDOG_SYSFS
>   	  Say Y here if you want to enable watchdog device status read through
>   	  sysfs attributes.
> +	bool "Enable watchdog hrtimer-based pretimeouts"
> +	help
> +	  Enable this if you want to use a hrtimer timer based pretimeout for
> +	  watchdogs that do not natively support pretimeout support. Be aware
> +	  that because this pretimeout functionality uses hrtimers, it may not
> +	  be able to fire before the actual watchdog fires in some situations.

suse labs

  parent reply	other threads:[~2021-09-02  6:55 UTC|newest]

Thread overview: 7+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-02-03 20:11 Curtis Klein
2021-02-04  1:35 ` Guenter Roeck
2021-09-02  6:55 ` Jiri Slaby [this message]
2021-09-02 14:05   ` Guenter Roeck
2021-09-04  8:16     ` was [Re: [PATCH v3] watchdog: Add hrtimer-based pretimeout feature] Jiri Slaby
     [not found]       ` <>
2021-09-05 22:22         ` Klein, Curtis
2021-09-05 22:56           ` Guenter Roeck

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