Messages in this thread | | | Date | Tue, 21 Jan 2003 12:50:39 +0000 | From | Dave Jones <> | Subject | Re: [PATCH][2.5] hangcheck-timer |
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On Mon, Jan 20, 2003 at 05:19:54PM -0800, Joel Becker wrote: > Folks, > Attached is a patch adding hangcheck-timer. It is used to detect > when the system goes out to lunch for a period of time, and then > returns. This is interesting for debugging drivers as well as for > clustering environments. > The module sets a timer. When the timer goes off, it then uses > get_cycles() to determine how much real time has passed. > On a normal system, the real elapsed time will be almost > identical to the expected timer duration. However, if a device decided > to udelay for 60 seconds (or some other circumstance), the module takes > notice. If the margin of error passes a threshold, the driver prints a > warning or the machine is rebooted.
Hi Joel, I'm puzzled. What does this do that softdog.c doesn't ?
Dave
-- | Dave Jones. http://www.codemonkey.org.uk | SuSE Labs - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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