kldunload oddities

Ruslan Ermilov ru at FreeBSD.org
Tue Sep 14 11:57:46 PDT 2004

Hi there,

This is with very recent -CURRENT, I'm not sure if this problem
new or not...

When I try to unload some modules that were loaded by loader(8),
I get this strange behavior:

ru# grep _load /boot/loader.conf 
ru# kldunload snd_csa
ru# kldunload snd_csa
kldunload: can't unload file: Device busy

#1.  The first kldunload command silently exits without unloading
     the module.

#2.  Why the snd_csa.ko module cannot be unloaded -- I can unload
     the if_dc module just fine and I can also unload snd_csa if
     I load it from userland.

Anyone with explanations for these two?

Ruslan Ermilov
ru at FreeBSD.org
FreeBSD committer
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