From: jiri.prchal@aksignal.cz (Jiří Prchal)
To: linux-arm-kernel@lists.infradead.org
Subject: at91sam9: watchdog: period
Date: Tue, 19 May 2015 11:52:16 +0200 [thread overview]
Message-ID: <555B07D0.4030000@aksignal.cz> (raw)
In-Reply-To: <20150519111402.747e8eb2@bbrezillon>
On 19.5.2015 11:14, Boris Brezillon wrote:
>
> There's a difference between your heartbeat (the frequency you
> refresh/reset your watchdog) and the watchdog expiration time (here set
> to 16 secs).
> We usually set the heartbeat to 1/2 or 1/4 the expiration time, so that
> we're (almost) sure we can reset the watchdog before its expiration.
>
>
I'm confused. Why need kernel to know the time in witch userspace process will reset watchdog?
And how to change watchdog expiration time?
next prev parent reply other threads:[~2015-05-19 9:52 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 [this message]
2015-05-19 10:04 ` Boris Brezillon
2015-05-20 12:39 ` Jiří Prchal
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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