Messages in this thread | | | Date | Mon, 09 Nov 2009 16:34:07 -0800 | From | "H. Peter Anvin" <> | Subject | Re: [PATCH 3/3] misc: use a proper range for minor number dynamic allocation |
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On 11/09/2009 04:30 PM, Thadeu Lima de Souza Cascardo wrote: > The current dynamic allocation of minor number for misc devices has some > drawbacks. > > First of all, the range for dynamic numbers include some statically > allocated numbers. It goes from 63 to 0, and we have numbers in the > range from 1 to 15 already allocated. Although, it gives priority to the > higher and not allocated numbers, we may end up in a situation where we > must reject registering a driver which got a static number because a > driver got its number with dynamic allocation. Considering fs/dlm/user.c > allocates as many misc devices as lockspaces are created, and that we > have more than 50 users around, it's not unreasonable to reach that > situation. > > The proposed solution uses the not yet reserved range from 64 to 127. If > more devices are needed, we may push 64 to 16. >
Again, why not push these up above 256?
-hpa
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