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

[Koen Kooi]

Op 10 mei 2011, om 14:14 heeft Lennart Poettering het volgende geschreven:

> On Tue, 10.05.11 14:11, Harald Hoyer (harald.hoyer at gmail.com) wrote:
> 
>> 
>> Am 10.05.2011 14:09, schrieb Lennart Poettering:
>>> On Tue, 10.05.11 13:47, Koen Kooi (koen at dominion.thruhere.net) wrote:
>>> 
>>>>> What udev version is that? I'm running current -git, maybe something
>>>>> was broken, don't know it though.
>>>> 
>>>> [  122.891967]<27>udevd[88]: unable to receive ctrl connection: Function not implemented
>>>> 
>>>> Time to rebuild eglibc I guess.
>>> 
>>> Hmm, does your kernel lack AF_UNIX/SOCK_SEQPACKET support?
>>> 
>>> Lennart
>>> 
>> 
>> Might be time, for a .config list of required features :-)
> 
> Neither accept4 nor AF_UNIX/SOCK_SEQPACKET are optional kernel
> features. However, they are relatively new kernel features and some
> archs had trouble keeping up in enabling them even though the code
> exists in the kernel.
> 
> Currently our README mentions that we need kernel >= 2.6.30. It might
> make sense to include another line mentioning that on ARM/MIPS/others
> you need an even newer one.

So after rebuilding eglibc against 2.6.37 headers and udev from git:

root at beagleboard-systemd:~# time ( udevadm trigger ; udevadm settle )

real    0m10.475s
user    0m0.000s
sys     0m0.133s

And the matching systemd-analyze plot: http://dominion.thruhere.net/koen/angstrom/systemd/git-with-accept4.svg

I'll do some more digging after linuxtag.

regards,

Koen