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    SubjectRe: [PATCH][2.5] hangcheck-timer
    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 Jones.
    | SuSE Labs
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