[yocto] poky-tiny, boot and filesystems

[Rudolf Streif]

John,

What is your actual problem? You appended the tiny-init recipe and your
changes do or do not get put into the rootfs? If you could post your recipe
then folks can look at it.

As far as boot time is concerned, you need to distinguish boot loader and
kernel boot from user space. It looks as if you are trying to optimize your
user space boot time by using an image that starts less services. What
services you need of course depends on your application. To optimize user
space boot process you may also want to investigate systemd instead of SysV
init.

Rudi


On Wed, Dec 18, 2013 at 8:26 AM, r10kindsofpeople <
r10kindsofpeople at gmail.com> wrote:

> I've been beating my head for a few days now, and would love a little
> guidance.  Acknowledging that there are multiple ways to skin the cat, my
> immediate goal is to reduce the boot time, presumably using poky-tiny.
>
> I have poky-tiny building for my hardware under dora.
> I have it booting on crownbay hardware by copying the .ext2 image onto the
> sdcard, installing grub, copying the .cpio.gz file on to the card, and
> using grub to load the kernel image and initrd the filesystem.
>
> I'm wondering if that last bit about initrd is the 'best' option, or if I
> should be overlaying a write-able filesystem on top of the original .ext2
> file system?  How?
>
> And I'm pretty sure I've not got something right...I figured out how to
> .bbappend the tiny-init recipe and get my own edits into 'init' and
> 'rc.local', but it appears those files and changes made it into both the
> ext2 file system and the .cpio.gz initrd file system.  On one hand, I'm
> grateful since it works, but 'both' seems to point at me getting something
> wrong.
>
> Any links to clear tutorials would be greatly appreciated.  There's a
> wealth of information available on this topic, but none that seems
> comprehensive (that I've found), and as I've said, each seems to take a
> different approach, leaving out a step or two along the way.
>
> John
>
>
>
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