[arch-general] What causes the 3-5 sec delay before :: running early hooks (udev)?

[David C. Rankin]

On 06/20/2012 01:10 PM, Tom Gundersen wrote:
> It is either the kernel or the initramfs. Your dmesg might tell you more
> (possibly some misbehaving kernel module?). Also, what modules/hooks do you
> have in your initramfs?
>
> Tom

Thanks Arno, Tom,

   There are no non-default hooks on the desktops. They all have:

HOOKS="base udev autodetect pata scsi sata filesystems usbinput fsck"

   On my 2 server boxes, I have dmraid in this order:

MODULES="dm_mod dm_mirror"
HOOKS="base udev autodetect pata scsi sata dmraid filesystems usbinput fsck"

   I do note that fsck was added at some point in time, but that was a default 
and not something I added.

   Looking at dmesg, I see the following delays > 2 sec:

[    7.957888] EXT4-fs (sdc5): mounting ext3 file system using the ext4 subsystem
[    8.016583] EXT4-fs (sdc5): mounted filesystem with ordered data mode. 
Opts: (null)
[   10.236553] udevd[140]: starting version 185

[   13.895401] vgaarb: device changed decodes: 
PCI:0000:01:00.0,olddecodes=io+mem,decodes=none:owns=io+mem
[   13.942931] NVRM: loading NVIDIA UNIX x86 Kernel Module  302.17  Tue Jun 12 
18:37:51 PDT 2012
[   31.985912] EXT4-fs (sdc5): re-mounted. Opts: (null)
[   32.049154] EXT4-fs (sdc7): mounted filesystem with ordered data mode. 
Opts: (null)

There is 19 sec for NVIDIA.

[   35.656087] ADDRCONF(NETDEV_CHANGE): eth0: link becomes ready
[   46.656677] eth0: no IPv6 routers present

11 secs for network init.

[   46.656677] eth0: no IPv6 routers present
[  144.443911] vboxdrv: Found 2 processor cores.

98 sec courtesy of dkms and a new kernel.

   I don't know, but the delay I see before the ':: running early hooks 
(udev)' message does not seem to correlate to these entries in dmesg. Is dmesg 
logging even active before the ':: running early hooks (udev)'?

-- 
David C. Rankin, J.D.,P.E.