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    SubjectRe: [PATCHSET 3/4] sysfs: divorce sysfs from kobject and driver model
    On Wed, Oct 10, 2007 at 10:24:43AM -0700, Martin Bligh wrote:
    >> The rules for sysfs files are the following:
    >> - one value, in text format, per file.
    >> - no action apon open/close
    >> - binary files are only allowed for "pass-through" type files
    >> that the kernel does not touch (like for firmware and pci
    >> config space)
    >> - directories should be associated with a kobject where it makes
    >> sense (no nesting deep subdirectories without a kobject
    >> present)
    >> - when a directory is created/removed, a uevent should happen
    >> declaring what type of device was created/removed.
    >
    > So you'll be removing:
    >
    > /sys/devices/system/node/node?/meminfo
    >
    > then?
    >
    > along with:
    >
    > /sys/devices/system/node/node?/distance
    > /sys/devices/system/node/node?/numastat
    >
    > and all the other things that violate the rules?

    I would love to do that :)

    And that goes to show how trying to enforce these kinds of rules is damm
    hard. Things slip by that I never notice because they are only for odd
    types of hardware :)

    > (which I do agree with ... I just don't think sysfs works for
    > performance stats as we've discussed several times before ;-))

    I agree that this doesn't work too, but also that if it's really needed,
    it can be done, just let us know about it (like
    /sys/block/BLOCKDEV/stat)

    thanks,

    greg k-h
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