Messages in this thread | | | Date | Tue, 25 Mar 2008 16:05:32 -0700 | From | "H. Peter Anvin" <> | Subject | Re: What to do about the 2TB limit on HDIO_GETGEO ? |
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> How does this have anything to do with boot times? Do you really have a > foolish shell script that iteratorates over every single disk in the > sysfs tree for every disk? What does it do that for?
Any time you want to get the sysfs information for a filesystem which is already mounted, that's what you're forced to do.
> I thought we were talking about 2TB disks here, with a proposed new > ioctl, not foolishness of boot scripts...
I pointed out that having a way to map device numbers to sysfs directories would have the same effect, *and* would be usable for other purposes. I'd rather see that than a new ioctl, and another, and another...
ioctl()s are also nasty since they're generally root-only (or rather, device-owner only). Since the information is already in sysfs, there is no benefit to this hiding. Otherwise one could consider a ioctl() "give me the sysfs name of this device."
-hpa
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