mount_mfs

[Stefan Aeschbacher <s.aeschbacher@bturtle.ch>]

Hi
I am working on an embedded OpenBSD. During the tests, a 
strange error occurred. In the rc-script I use the following 
code to mount /dev as a mfs (/ is ro. /tmp is a symlink to
/var/tmp, which is also a mfs):

(cd /; find -x dev | cpio -o) > /tmp/dev.tmp
echo "mount_mfs of /dev"
mount_mfs -s 4096 -i 512 swap /dev
(cd /; cpio -i -d < /tmp/dev.tmp)

In some cases (~20% of the time), when cpio starts extracting, 
/dev is not yet mounted. To a later time during the execution 
of rc, /dev is mounted mfs, obviously not containing the dev-entries 
and therefore leaving the system in a unusable state.
OpenBSD version is 2.9
Can someone tell me why this happens?

thanks

Stefan