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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.

-hpa


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