iostats broken for devices with major number > DK_MAX_DISK (16)

Per Andreas Buer (perbu@linpro.no)
12 Nov 2002 21:35:38 +0100


Hi,

sorry for the intrusion. I noticed iostats didn't display statistics for
devices on Mylex RAID constrollers. Det statistics are completely
missing in /proc/stat. The reason seems to be an assumption that disks
have major numbers which are below 16
(http://lxr.linux.no/source/include/linux/kernel_stat.h#L15) which is
used by http://lxr.linux.no/source/fs/proc/proc_misc.c#L344.

Devices on Mylex-controllers have major number 48. Would it break
anything if DK_MAX_MAJOR if set higher (e.g. 64)?

AFAIK this goes for both 2.4 and the 2.5 series.

-- 
Per Andreas Buer
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