diff options
| author | imp <imp@FreeBSD.org> | 2000-06-14 23:34:22 +0000 |
|---|---|---|
| committer | imp <imp@FreeBSD.org> | 2000-06-14 23:34:22 +0000 |
| commit | 164b9a109cd752885b55bd2472e93c218aeff33c (patch) | |
| tree | 9cf51df6f9691a583e8495a5e4ce1af4a738b92a /sys/conf/majors | |
| parent | 34fec64322b7b78a8673d018e3bbe50eaf8a8cc1 (diff) | |
| download | FreeBSD-src-164b9a109cd752885b55bd2472e93c218aeff33c.zip FreeBSD-src-164b9a109cd752885b55bd2472e93c218aeff33c.tar.gz | |
This file lies by saying 200-255 are reserved for local use, thus
implying that they aren't used for the rest of the system.
Fix the lies:
253 is used by mfs (bad MFS for not registering it).
254 is a magic cookie inside of the dev code in at least one place.
255 is -1 which is magic in a different way in the dev code.
So, that means that 200-252 are reserved for local users. A grep for
252 didn't turn anything up, so I'm assuming it and lower are safe.
And I thought I was being smart by allocating our local major numbers
from 254 on down. This caused very very odd problems that were hard
to track down: close not being called, sync failing at reboot, etc.
Diffstat (limited to 'sys/conf/majors')
| -rw-r--r-- | sys/conf/majors | 7 |
1 files changed, 5 insertions, 2 deletions
diff --git a/sys/conf/majors b/sys/conf/majors index 2869683..d77a9d0 100644 --- a/sys/conf/majors +++ b/sys/conf/majors @@ -165,5 +165,8 @@ chrdev name comments 146 twe 3ware Escalade ATA RAID (controller) 147 twed 3ware Escalade ATA RAID (drives) 148 agp AGP <dfr> -200 ?? entries from 200-255 are reserved for local use -255 ?? entries from 200-255 are reserved for local use +200 ?? entries from 200-252 are reserved for local use +252 ?? entries from 200-252 are reserved for local use +253 mfs Used by MFS +254 internal Used internally by the kernel +255 bad choice -1 is 255 which has magic meanings internally |
