[PATCH] squash osmin: saves 1.2MB of ram during LiveOS session (except install)

[Douglas McClendon]

The attached patch implements the solution recently discussed, to avoid
wasting 1.2M of ram during LiveOS sessions, during the non-install times
when the 1.2M of ram for the minimized filesystem overlay is not
actually needed.

This implementation involves putting osmin in its own squashfs, and
copying that 12kb image to ram, as opposed to an alternative of putting
osmin in the same squashfs as the main system image.  I chose to
implement the seperate version, because it guarantees that the install
will remain one long ~2G seekless cdrom read.

This is seperate from the filesystem layout patchset I posted, but
straightforward merging would need to be done if they are both applied.

[Jeremy Katz]

On Sun, 2007-09-23 at 05:29 -0500, Douglas McClendon wrote:
>  The attached patch implements the solution recently discussed, to
> avoid
>  wasting 1.2M of ram during LiveOS sessions, during the non-install times
>  when the 1.2M of ram for the minimized filesystem overlay is not
>  actually needed.
>  
>  This implementation involves putting osmin in its own squashfs, and
>  copying that 12kb image to ram, as opposed to an alternative of putting
>  osmin in the same squashfs as the main system image.  I chose to
>  implement the seperate version, because it guarantees that the install
>  will remain one long ~2G seekless cdrom read. 
Applied with a tiny rename to just be osmin.img instead of
osmin.squashfs.img.  The latter doesn't add a lot of value and could be
problematic on msdos (not vfat) usb sticks

Jeremy