Messages in this thread | | | Date | Wed, 11 Nov 2009 15:36:32 -0800 | From | Andrew Morton <> | Subject | Re: [PATCH 3/3] misc: use a proper range for minor number dynamic allocation |
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On Mon, 09 Nov 2009 16:34:07 -0800 "H. Peter Anvin" <hpa@zytor.com> wrote:
> 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? >
I merged this patch, but made a note-to-self that there are remaining open issues..
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