Messages in this thread |  | | | Date | Fri, 18 Jun 1999 17:49:43 -0700 (PDT) | | From | Dan Hollis <> | | Subject | Re: UUIDs (and devfs and major/minor numbers) |
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On Fri, 18 Jun 1999, Theodore Y. Ts'o wrote: > Actually, I'm not convinced that major/minor numbers are the problem. > Right now we have our choice between statically allocated major/minor > numbers, which admittedly can be a problem because you have to deal with > a central registry (although I don't that problem is *that* bad yet!), > or purely dynamic major numbers which have the problem that it's hard to > create the devices with the correct major number. (Althoguh this > problem can be solved; I dealt with it in the Comtrol Rocketport > driver's rc.d script, before I got a statically allocated major number.)
The current major/minor allocations are becoming a mess. There are holes, and some legacy overlaps in allocations. There are also some arbitrary limits on number of devices eg serial that are caused by maj/min allocation. There might be plans to move to 8:24 or 16:16 but still doesnt solve the problem of central registry and general messiness. In fact it may make it worse 8)
And it looks like /dev/ptyp0 moved from 4:128 to 2:0 - what happens if you boot a new kernel on an old fs with ancient maj/min allocations? Does the kernel bitch or does it blow up 8)
-Dan
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