Usually, I do a lsmod after a boot with autodetection. Then, I select
only modules that are used (none 0 value) and are not needed by other
modules (no module name on the last column).
For example :
[EMAIL PROTECTED] ~]$ lsmod | head -n 5
Module Size Used by
i915 21376 2
drm 70420 3 i915
nls_cp850 5120 1
parport_pc 35172 0
parport_pc is not used
drm is used but is needed by i915 so loading i915 will load drm
i915 and nls_cp850 are needed
But you should be careful. Some modules may be missing (usb-storage for
example, if you didn't plug your UMS device but may use one), and some
may be unused but usefull (parport_pc could be used). Other modules may
be loaded but you don't want to use it (pcmcia on a laptop if you don't
plan to use it).
So this is not just that easy. It's just a good start.
Colin Pitrat (Bull Services Telco)
Bull, Architect of an Open World (TM)
Tél : +33 (0) 1 30 80 72 93
www.bull.com
-------- Message original --------
De: LEVIS Cyril <[EMAIL PROTECTED]>
Pour: [EMAIL PROTECTED], General Discusson about Arch Linux <[email protected]>
> Date: 23/07/2007 3:02:42 PM +0200
Objet: [arch] How fast could boot Arch?
How to find needed module ? I have add some specific module but how
kknow what are the hidden moduels i must add?
(sorry for my english)
thanks
Le lundi 23 juillet 2007 à 14:28 +0200, Colin Pitrat a écrit :
I tried to make my system boot as fast as possible too, and the two
really important improvements where :
1) MOD_AUTOLOAD = no and put all needed modules in MODULES in /etc/rc.conf
2) tune mkinitcpio.conf to specify only needed modules and remove all
unneeded HOOKS (including udev and autodetect)
If you don't need autodetect but want to keep udev, I think it should
also speedup boot. If you want to keep udev and autodetect, I don't
think you can do better.
Colin Pitrat (Bull Services Telco)
Bull, Architect of an Open World (TM)
Tél : +33 (0) 1 30 80 72 93
www.bull.com
-------- Message original --------
De: Dimitrios Apostolou <[EMAIL PROTECTED]>
Pour: General Discusson about Arch Linux <[email protected]>
Date: 23/07/2007 1:37:55 PM +0200
Objet: [arch] How fast could boot Arch?
My primary complaint for the long boot time is udev... It takes 20 seconds on
my 800MHz system, even if I disable MOD_AUTOLOAD. But I guess this is not
arch specific, I have seen similar times on other distros as well and even
minutes of wait time on older systems.
I suppose it has to do with the "including the kitchen-sink" default kernel,
which causes udev_settle to wait for too many triggered events. So one
solution would be to compile a custom kernel, with only the necessary modules
enabled.
Any other ideas on improving udev?
Dimitris
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