On Fri, 2008-11-14 at 16:09 -0600, Hollis Blanchard wrote:

Basically my revised proposal is to add explicit memory reservation properties 
to the device tree. Currently, "/memreserve" properties in .dts files are not 
present in the device tree itself, only in the FDT header. I think these 
reservations should be duplicated in the tree itself, so that they become 
visible to post-boot tools like kexec.

In summary, all memory reservations will then exist both in the device tree 
and in the FDT header. Comments?

Impact to uboot: revert memory node truncation; create reservation 
and /memreserve property.

Impact to cuboot wrapper: revert memory node truncation; create reservation 
and /memreserve property.

Impact to kernel: none. /memreserve will be ignored, since memory reservations 
are already handled properly.

Impact to kexec-tools: Must take /memreserve into account when placing data 
at "the end of memory".

If this is all too much, then I'm close to giving up and burning a 64KB page, 
which requires only ALIGN_DOWN() in the kernel.

Any comments?

-- 
Hollis Blanchard
IBM Linux Technology Center