On 04/22/2012 06:54 AM, Lennart Poettering wrote:
On Fri, 13.04.12 13:37, Mark Hounschell ([email protected]) wrote:
On 04/12/2012 08:25 AM, Mark Hounschell wrote:
On 04/11/2012 05:12 PM, Kay Sievers wrote:
On Wed, Apr 11, 2012 at 22:44, Mark Hounschell<[email protected]> wrote:
Same thing. About 20 seconds after reaching the target, the device
entries
show up.
Does that block or return immediately?
rmmod<driver>;
modprobe<driver>; time udevadm settle
Your driver creates the stuff async?
After booting up to graphical login:
rmmod dgdm
modprobe dgdm ; time udevadm settle
real 0m0.107s
user 0m0.000s
sys 0m0.000s
modprobe blocks until the process has completed.
It appears, by watching the boot screen, when using sysvinit the boot
process pauses at a certain point until this has completed. It doesn't
stop as soon as it starts, but it does pause nun the less. Using systemd
it does appear to.
Correction: Using systemd it does NOT appear to.
On a systemd system that lacks udev-settle in the boot path we do not
wait for any module to finish initialization at boot. This makes things
fast and clean but will not work if code that initializes later is not
capable of dealing with hardware being added at runtime.
Does putting the Requires and After for udev-settle in the target file
cause it to be "in the boot path"?
If you enabled udev-settle we will delay boot for a certain amount of
time until all drivers that have been queued to load are finished (or a
timeout elapses). This is only necessary if your sw is incapable of
properly dealing with hw that shows up dynamically.
Lennart
The cards are detected at boot time, the driver loads, starts the cards
running (this is what takes so long), creates the device entries, then
leaves it's init routine.
Does not the following "lcrs-host.service" service file cause
udev-settle to do it's thing on boot?
[Unit]
Description=LCRS host
Requires=udev-settle.service
After=udev-settle.service
[Service]
Environment=TERM=vt100
ExecStart=/sbin/qlogin /dev/ttyS0 root --homedir=/lcrs --noutmp
--command=/bin/bash --login -c /lcrs/sh.lcrs_host
Restart=always
RestartSec=3
This is my target file.
[Unit]
Description=LCRS run-level-4 target
Requires=syslog.target
Requires=udev-settle.service
After=syslog.target
After=udev-settle.service
[email protected]
[email protected]
[email protected]
Wants=syslog.service
Wants=udev.service
[email protected]
[email protected]
[email protected]
[email protected]
Wants=lcrs-host.service
AllowIsolate=yes
Once in a while, it actually does wait and everything works as I would
expect??? But that's rare.
Regards
Mark
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