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    SubjectRe: What to do about the 2TB limit on HDIO_GETGEO ?
    Greg KH wrote:
    > On Tue, Mar 25, 2008 at 01:36:51PM -0700, H. Peter Anvin wrote:
    >> Randy Dunlap wrote:
    >>>> Come on people, adding symlinks for device major:minor numbers in sysfs
    >>>> to save a few 10s of lines of userspace code? Can things get sillier?
    >>>> You can add a single udev rule to probably build these in a tree in /dev
    >>>> if you really need such a thing...
    >>>> And what's wrong with your new ioctl recomendation?
    >>> Ah, there's some sanity. :)
    >> It's not so much an issue of a few tens of lines of user space code, but
    >> rather the fact that something that should be O(1) is currently O(n).
    > "should"? why? Is this some new requirement that everyone needs? I've
    > _never_ seen anyone ask for the ability to find sysfs devices by
    > major:minor number in O(1) time. Is this somehow a place where such
    > optimization is warranted?

    Well, when dealing with shell scripts a O(n) very easily becomes O(n^2).
    For the stuff that I, personally, do, it's not a big deal, but people
    with large number of disks have serious gripes with our boot times.


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