Re: New fast(?)-boot results on ARM

Marco Stornelli
2009-08-18T10:11:28Z

Johannes Stezenbach wrote:
> On Fri, Aug 14, 2009 at 10:43:05PM +0200, Robert Schwebel wrote:
>> On Fri, Aug 14, 2009 at 10:04:57PM +0200, Denys Vlasenko wrote:
>>>> rsc@thebe:~$ microcom | ptx_ts "U-Boot 2.0.0-rc9"
>
>>>> [ 7.137924] < 0.059316> starting udev
>>>> [ 7.147925] < 0.010001> mounting tmpfs at /dev
>>>> [ 7.182299] < 0.034374> creating static nodes
>>>> [ 7.410613] < 0.228314> starting udevd...done
>>>> [ 8.811097] < 1.400484> waiting for devices...done
>
> And suddenly devtmpfs sounds like a good idea ;-)
>
> We use static device nodes during boot, and later
> setup busybox mdev for hotplug.
>
>
> Johannes
>

Yeah, I agree, do you really need udevd, device file creation at every
start-up in /dev? Usually static devices nodes and mdev for hotplug are
enough or at least you could use a simple script to create only once
time the devices file (mdev -s). About the fs, do you really need a
rootfs with ubifs? I mean, you could "split" your fs. You could use a
read-only fs (SquashFS for example) for your root-fs, ubifs for
permanent storage data (mounted under /data for example) and a ram fs
for volatile data.

Marco