cdrom_sysctl_register uses LOTS of CPU, and no cdrom is attached (2.4.20-pre10)

From: Roy Sigurd Karlsbakk (roy@karlsbakk.net)
Date: Mon Oct 14 2002 - 09:39:08 EST

hi

I have these server nodes, doing video streaming.
and
running a server benchmark with 20 concurrent client connections. hardware is
4 IDE drives. kernel is 2.4.20-pre10 + ext3 O_DIRECT support. filesystem is
ext3.

The only system call that seems to eat any system time of importance is
'cdrom_sysctl_register'

problem is: there is no cdrom on the system!

attached is the .config and these three readprofile output files (pro[123]).
see time to see the interval they have been created in

bash-2.05# ls -l pro[1-3]
-rw-r--r-- 1 root root 13965 Jan 29 00:05 pro1
-rw-r--r-- 1 root root 14193 Jan 29 00:06 pro2
-rw-r--r-- 1 root root 15162 Jan 29 00:09 pro3

roy 

-- 
Roy Sigurd Karlsbakk, Datavaktmester
ProntoTV AS - http://www.pronto.tv/
Tel: +47 9801 3356

Computers are like air conditioners.
They stop working when you open Windows.

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This archive was generated by hypermail 2b29 : Tue Oct 15 2002 - 22:00:50 EST