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    SubjectRe: [PATCH][RFC] Proposal for a new watchdog interface using sysfs
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    On Thu, 13 Feb 2003 15:58:17 MST, Matt Porter said:

    > Yes, and on embedded SoC devices we have watchdog facilities sitting
    > on an internal chip bus. It would be nice to find access points in
    > a uniform place on any Linux system. i.e. PCI watchdog on my x86 desktop
    > is in the same place as the on-chip watchdog on my PPC44x system.
    >
    > IMHO, anything else would be a logical step backwards from accessing
    > /dev/watchdog across platforms.

    I admit not having thoroughly read the source to check - is the userspace API
    for accessing all these chips fairly uniform and rational, so that a user
    program can be reasonably sure that if stat("/dev/watchdog") returns zero, that
    it knows how to deal with it? Or are they all sufficiently close to the "keep
    reloading a countdown timer from userspace, and if it ever doesn't get reloaded,
    kick the kernel in the seat of the pants" programming model? Of course, even
    a disagreement on the units of the timer could be bad - a seconds/milliseconds
    clash could result is a *real* fast lack-of-joy situation.. ;)

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