[yocto] poky-tiny, boot and filesystems

[r10kindsofpeople]

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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