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From: Pratyush Anand <panand@redhat.com>
To: linux-watchdog@vger.kernel.org
Cc: Dave Young <dyoung@redhat.com>, Don Zickus <dzickus@redhat.com>
Subject: Query: Best way to know if a watchdog is active (kicked)
Date: Tue, 18 Aug 2015 10:45:32 +0530	[thread overview]
Message-ID: <20150818051532.GC27149@dhcppc13.redhat.com> (raw)

Hi,

I am looking for the best way to know if a watchdog has been kicked and active.

I can see a way is to read timeout(WDIOC_GETTIMEOUT) and  timeleft(
WDIOC_GETTIMELEFT). If they do not match, it means that wdt is active.

But what if we tried to read timeleft just in time when watchdog daemon/or some
other application had kicked it. May be we read timeleft twice at the interval
of 1 sec.

Please let me know if there is any other alternative which could be a better way
to know if watchdog is active?  Or may be it would be good to implement an ioctl
WDIOC_ACTIVE?

Thanks

~Pratyush

             reply	other threads:[~2015-08-18  5:15 UTC|newest]

Thread overview: 13+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2015-08-18  5:15 Pratyush Anand [this message]
2015-08-18  5:39 ` Query: Best way to know if a watchdog is active (kicked) Guenter Roeck
2015-08-18  6:57   ` Pratyush Anand
2015-08-18  9:13     ` Dave Young
2015-08-18  9:52       ` Pratyush Anand
2015-08-18 12:50     ` Guenter Roeck
2015-08-18 13:08       ` Pratyush Anand
2015-08-18 14:23         ` Guenter Roeck
2015-08-21  8:52           ` Pratyush Anand
2015-08-21 15:19             ` Guenter Roeck
2015-08-21 17:05               ` Pratyush Anand
2015-08-21 17:13                 ` Guenter Roeck
2015-08-21 17:19                   ` Pratyush Anand

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