[CentOS] How to use watchdog daemon with hardware watchdog driver interface?
Steve Clark
sclark at netwolves.comWed Sep 18 14:01:00 UTC 2013
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On 09/18/2013 07:20 AM, Alexander Farber wrote: > Hello Steve, > > yes, I have that device: > > # ll /dev/watchdog > crw-rw---- 1 root root 10, 130 Sep 17 23:21 /dev/watchdog > > # ps uawwx|grep w[a]tchdog > root 6 0.0 0.0 0 0 ? S Sep17 0:00 [watchdog/0] > root 10 0.0 0.0 0 0 ? S Sep17 0:00 [watchdog/1] > root 14 0.0 0.0 0 0 ? S Sep17 0:00 [watchdog/2] > root 18 0.0 0.0 0 0 ? S Sep17 0:00 [watchdog/3] > root 22 0.0 0.0 0 0 ? S Sep17 0:00 [watchdog/4] > root 26 0.0 0.0 0 0 ? S Sep17 0:00 [watchdog/5] > root 30 0.0 0.0 0 0 ? S Sep17 0:00 [watchdog/6] > root 34 0.0 0.0 0 0 ? S Sep17 0:00 [watchdog/7] > root 12175 0.0 0.0 6236 2140 ? SLs 11:11 0:00 > /usr/sbin/watchdog -v > > # grep -v ^# /etc/watchdog.conf > ping = 144.76.XXX.XXX > admin = root > logtick = 360 > realtime = yes > priority = 1 > > So you think killing with -9 will indicate > if I have hardware watchdog or just software? > > Regards > Alex the root 6 0.0 0.0 0 0 ? S Sep17 0:00 [watchdog/0] I believe are related to the cpus. When you service watchdog start you will see a process like below. That is what you want to kill -9 2094 ? SLs 0:13 /usr/sbin/watchdog That will preventing it from telling the kernel to reset the watchdog timer which will expire and should reboot you system. If you don't use -9 the watchdog process will gracefully stop and tell the kernel to turn of the watchdog timer so it won't expire causing the reboot. Anyway that it how it works on my system. > _______________________________________________ > CentOS mailing list > CentOS at centos.org > http://lists.centos.org/mailman/listinfo/centos > -- Stephen Clark *NetWolves* Director of Technology Phone: 813-579-3200 Fax: 813-882-0209 Email: steve.clark at netwolves.com http://www.netwolves.com
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