On Tue, Dec 3, 2013 at 10:28 PM, Peter Teoh <[email protected]> wrote:
> Hi Vipul, > > I have seen this in a number of commercial software running on RHEL, and > on other realtime OS as well. The watchdog mechanism is always working in > pair: userspace "feeding" the dog (in the kernel). (btw, feed the dog > is a more usually used term than "pet" the dog. sorry for that. google > for that and perhaps you can get more info?). > > Like Valdis said, this way you will know when userspace hang, which is the > key criteria for reboot. Why do u want to detect if the kernel hang > (versus busy doing something)? Theoretically that is not possible, > especially when all interrupt are disabled. > >> >> Hi Peter, If you don't mind can you please provide me more insight as what can be false alarm I can encounter to move pet inside kernel module? Regards, Vipul.
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