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Date: Wed, 20 Dec 2006 08:16:47 +0100
From: Enrico Migliore <enrico.migliore@fatti.com>
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To: Michel LECONTE <michel.leconte@sacet.com>
Subject: Re: Reduce boot time with jffs2 and CM-X255
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Hi Michel,

 could you be more specific?
 The boot time, in a production environment, is the time that elapses 
from the board reset to the login prompt.
 How long is that time on your cm-x255?

 Enrico
> Hi,
>
> I use a cm-x255 compulab card and I boot on the NAND flash with jffs2
> filesystem.
>
> My problem is the boot is too long.
>
> My method to boot on the NAND flash is :
>
> 1) I boot on the cm-x225 via nfs.
>
> 2) I format the flash:
>
> flash_eraseall -j /dev/mtd1
>
> 3) I mount the flash :
>
> mount -t jffs2 /dev/mtdblock1 /mountpoint
>
> 4) I put the distribution of my system on the flash:
>
> cp -r /Distribution/* /mountpoint
>
> 5) I unmount the flash :
>
> umount /mountpoint
>
> 6) Finally, I boot on the cm-x255 board with the 2.6.18 kernel and
> options are :
>
> - Boot options : root=/dev/mtdblock1 rootfstype=jffs2
> ip=192.168.82.70:::255.255.255.0:arm:eth0
>
> - Miscellaneous filesystems : Journalling Flash File System v2 (JFFS2)
> support
>
> JFFS2 debugging verbosity à 0
>
> JFFS2 write-buffering support
>
> JFFS2 summary support (EXPERIMENTAL)
>
>
> I would like to know what I'm missing or what I have to do to decrease
> boot time ?
>
>
> Thanks for any suggestion or help.
>
> Michel
>
>
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