From mboxrd@z Thu Jan  1 00:00:00 1970
From: Nigel Kukard <nkukard@lbsd.net>
Date: Sat, 01 Aug 2009 19:55:10 +0000
Subject: udev 145, when are events fully processed?
Message-Id: <4A749D9E.3020709@lbsd.net>
List-Id: <linux-hotplug.vger.kernel.org>
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To: linux-hotplug@vger.kernel.org

Hi Guys,

Trying to figure something out here, using the following I'm seeing a
delay in the creation of block devices in /dev ...

# trigger the sorted events
echo -e '\000\000\000\000' > /proc/sys/kernel/hotplug

rm -fr /dev/.udev > /dev/null 2>&1
mkdir -p /dev/.udev > /dev/null 2>&1
/sbin/udevd

# Not entirely sure what this is for
/sbin/udevadm control --env=STARTUP=1
/sbin/udevadm trigger
/sbin/udevadm settle
# Nor sure what this does
/sbin/udevadm control --env=STARTUP

I think my problem is, while all the events have been sent to udevd
there is a delay if I do a  "fsck LABEL=root" straight on say the next
line,  a "ls" shows that none of the block devices exist until a second
or two later. A sleep 5 before my "ls" works around this and the block
devices show up.

Any ideas how I can determine once all udev events have finished
processing so I can continue boot?


Kind Regards
Nigel