From: jiri.prchal@aksignal.cz (Jiří Prchal)
To: linux-arm-kernel@lists.infradead.org
Subject: at91sam9: watchdog: period
Date: Wed, 20 May 2015 14:39:57 +0200 [thread overview]
Message-ID: <555C809D.8090407@aksignal.cz> (raw)
In-Reply-To: <20150519120433.763a416e@bbrezillon>
On 19.5.2015 12:04, Boris Brezillon wrote:
>> I'm confused. Why need kernel to know the time in witch userspace process will reset watchdog?
>
> This time is not exposed to userspace, it's the internal heartbeat used
> by the driver to refresh the watchdog.
Kernel driver does refresh? For what is utility "watchdog" in busybox?
When I stop this util then it will reboot.
>
>> And how to change watchdog expiration time?
>
> With the atmel,max-heartbeat-sec property.
No effect on it, still 61s.
>
> Anyway, that does not explain why your system takes 61 secs to trigger
> a reset (instead of 16 secs).
> Can you try to revert this commit [1] ?
Because of our company internet policy I can't clone git so I tried kernel 3.18.13.
No change, still 61s.
>
>
> [1]https://git.kernel.org/cgit/linux/kernel/git/stable/linux-stable.git/commit/drivers/watchdog/at91sam9_wdt.c?id=d677772e1358924bf487cd833bdc4d50f3f6f64d
>
next prev parent reply other threads:[~2015-05-20 12:39 UTC|newest]
Thread overview: 23+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-05-15 7:16 at91sam9: watchdog: period Jiří Prchal
2015-05-15 13:59 ` Bryan Evenson
2015-05-15 14:19 ` Nicolas Ferre
2015-05-18 6:25 ` Jiří Prchal
2015-05-15 15:25 ` Boris Brezillon
2015-05-18 6:27 ` Jiří Prchal
2015-05-18 7:27 ` Boris Brezillon
2015-05-18 8:17 ` Jiří Prchal
2015-05-19 3:07 ` Yang, Wenyou
2015-05-19 7:14 ` Boris Brezillon
2015-05-19 9:01 ` Jiří Prchal
2015-05-19 9:14 ` Boris Brezillon
2015-05-19 9:52 ` Jiří Prchal
2015-05-19 10:04 ` Boris Brezillon
2015-05-20 12:39 ` Jiří Prchal [this message]
2015-05-21 12:41 ` Jiří Prchal
2015-05-27 7:11 ` Jiří Prchal
2015-05-19 7:12 ` Boris Brezillon
2015-05-19 9:00 ` Jiří Prchal
2015-10-06 13:07 ` Jiří Prchal
2015-10-06 18:03 ` Sylvain Rochet
2015-10-07 7:16 ` Jiří Prchal
2015-10-07 9:22 ` Sylvain Rochet
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