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1
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0answers
36 views

difference between /dev/watchdog and /dev/watchdog[0-9]?

On my (embedded) system I have multiple watchdog character devices: # ls -al /dev/watchdog* crw------- 1 imp root 10, 130 Apr 26 07:43 /dev/watchdog crw------- 1 root root 253, 0 Apr 26 07:44 ...
2
votes
0answers
12 views

Watchdog too fast for apache PID-file

I am running Ubuntu Trusty on an ARM embedded board. Init System is Upstart. The watchdog (v5.13) should supervise the apache server. Obviously the watchdog is testing for the apache pid-file before ...
1
vote
0answers
100 views

Periodically get CPU usage for single process

I've got a problem with the kswapd0 process (pid 52), which from time to time would start to use 25% of the cpu (one full core). I usually stop it with the command sudo sh -c "echo 1 > ...
3
votes
2answers
1k views

message at shutdown: watchdog did not stop!

At shutdown I often get the message watchdog did not stop! and then the laptop freezes after few other lines without shutting down. Any idea on how to fix this? Recently it happened very often, ...
0
votes
0answers
115 views

Systemd: service doesn't restart with WatchdogSec option set

I'm trying to manager qemu with systemd. If qemu crashes, it can be restart automatically. I have the following unit file: [Unit] Description=vm manager After=network.target Before=shutdown.target ...
1
vote
1answer
77 views

Send network connectivity ping from server to client

So I have a server and a client computer which I must have running on the network all the time. Somemtimes because I am running my client computer on WLAN the network goes down so I need to restart ...
0
votes
0answers
151 views

Is there any reason the hardware watchdog (itco_wdt) would react to the NMI watchdog firing after a reboot?

I have a script which unloads the hardware watchdog and loads the softdog module, then reboots (in case the system hangs, so it will still reboot, but not wait for F1 to be pressed as the hardware ...
0
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0answers
43 views

rmmod/modprobe -r of nmi_watchdog but the module/device is still working

I have a theory that the mni_watchdog device is still operating on a system despite the given module being removed with modprobe -r. Is it possible, and under what conditions, that a module would ...
4
votes
1answer
1k views

Watchdog daemon doesn't start at boot

I'm using a Raspberry Pi B, with Raspbian. After upgrading to Jessie, watchdog daemon doesn't start at boot anymore. Starting it manually using "sudo service watchdog start" does work. I tried: ...
1
vote
0answers
71 views

What are the consequences of disabling nmi_watchdog?

My aim was to improve battery life for my laptop. I have already applied some advised modifications like enabling ALPM, and adding pcie_aspm=force drm.vblankoffdelay=1 i915.semaphores=1 at grub ...
3
votes
1answer
344 views

Error codes for watchdog daemon

Here's a line from a linux syslog: watchdog[2423]: shutting down the system because of error 101 However, after searching online and in man watchdog, I cannot find any discussion or explanation of ...
9
votes
1answer
1k views

Do I own a watchdog?

Quite often times when I do a reboot, I get the following error message: kernel: watchdog watchdog0: watchdog did not stop! I tried to find out more about watchdog by doing man watchdog, but it ...
3
votes
0answers
119 views

Is Watchdog can be disabled if once it is enabled?

I created a watchdog daemon application with time interval of 30 seconds; for every 5 seconds, I am trying to hit the watchdog counter, and it's working fine. If I kill this daemon process it shows ...
2
votes
2answers
1k views

Any way in Bash to write to a file every X seconds without closing it?

The hardware watchdog on my system needs a 0 written to /dev/watchdog at less than 60 seconds interval or it will fire. The file handle must be kept open however or the watchdog is then disabled. ...
1
vote
0answers
202 views

linux watchdog and systemd watchdog

I'm in trouble with watchdog :( Is there any way to register application into systemd watchdog at runtime? Does linux watchdog only use for system reset or it can be use for application reset?
2
votes
1answer
1k views

How enable watchdog?

I'm struggling with the watchdog timer (wdt) for a while. I can't get it working. My microcontroller is a AriaG25, based on the AT91SAM925. I have used this tutorial to compile the kernel. The ...
1
vote
0answers
30 views

Building a process Watchdog [duplicate]

I intend to write a process watchdog that runs out of cron or similar that watches all of the core processes denoting things like run state, VMstat, Inet operations and reports it to a file or ...
2
votes
1answer
6k views

How to correctly configure Debian watchdog daemon for BIOS Watch Dog?

Supermicro main boards contain a BIOS feature named "Watch Dog Function". Having Debian 6.0.6 with kernel "Linux debian 2.6.32-5-amd64 #1 SMP" we did: Change BIOS "Watch Dog Function" from Disabled ...
5
votes
1answer
4k views

What is a “watchdog reset”?

After reading this question, I was a little confused; it sounds like some daemon reacting by rebooting a system. Is that right? Is it a common occurrence in embedded *nixes?
3
votes
2answers
5k views

How do I cause a watchdog reset of my embedded Linux device

Is there a command like vi > out vi | out That I could use to cause a watchdog reset of my embedded linux device?