[systemd-devel] device units rely on udev rules?

[Kay Sievers]

On Tue, May 10, 2011 at 20:37, Koen Kooi <koen at dominion.thruhere.net> wrote:

>>> root at beagleboard-systemd:~# time ( udevadm trigger ; udevadm settle )
>>>
>>> real    0m10.475s
>>
>> Ok, at least the timeout issue seems gone.
>>
>> How many device do you have?
>>  find /sys -name uevent | wc -l
>
> root at beagleboard-systemd:/usr/bin#  find /sys -name uevent | wc -l
> 462
>
>> How many devices have a modalias:
>>  find /sys -name modalias | wc -l
>
> root at beagleboard-systemd:/usr/bin# find /sys -name modalias | wc -l
> 84

That looks all fine.

> parse_file: reading '/etc/udev/rules.d/50-udev-default.rules' as rules file
> parse_file: reading '/etc/udev/rules.d/95-udev-late.rules' as rules file
> parse_file: reading '/etc/udev/rules.d/local.rules' as rules file
> parse_file: reading '/etc/udev/rules.d/permissions.rules' as rules file
> parse_file: reading '/etc/udev/rules.d/run.rules' as rules file
> parse_file: reading '/etc/udev/rules.d/udev.rules' as rules file

What are these files? There is no default udev rules file in /etc.
'late' is years old, and the ones without number prefix look like they
come from something else, and they shouldn't be there.

> real    0m0.065s

>> If you run it only for certain subsystems, what does it give you:
>>  time ( udevadm trigger -s block; udevadm settle )
>
> That triggers a preempt bug and oopses the kernel.

Great! :)

>>  time ( udevadm trigger -s tty; udevadm settle )
>
> root at beagleboard-systemd:~#  time ( udevadm trigger -s tty; udevadm settle )
>
> real    0m1.203s
> user    0m0.000s
> sys     0m0.031s

That's seems very long compared to the above run for a single tty.

>> I'll be around Fri+Sat. Maybe we'll walk into each other ...
>
> I'll attend the systemd talk :)

Good. See you there.

Kay