[PATCH 1/5] arm/dt: tegra: Remove /memreserve/ from device-treefiles

On Tuesday 22 November 2011 08:25:03 Stephen Warren wrote:

Marc Dietrich wrote at Tuesday, November 22, 2011 3:42 AM:

quoted

On Monday 21 November 2011 14:44:07 Stephen Warren wrote:

quoted

There are no drivers in the kernel at present which can make use of
the
memory reserved by /memreserve/, so there is no point reserving it.
Remove /memreserve/ to allow the user more memory. It's also
unclear whether any future driver would actually require
/memreserve/, or allocate memory through some other mechanism.

while this gives 512 MB of usable memory on my AC100, it causes some
funny pictures on the screen ;-) I guess our bootloader (fastboot)
already setups the frambuffer there (and enables the backlight). I
guess it shouldn't be harmful as nothing else writes to this memory
area. Otherwise you may add that the bootloader (or the kernel cmdline
supplied by the bootloader) is now responsible for the reservation to
the description.

Ah yes, I guess that would happen. I'm only testing with mainline U-Boot...

I'd suggest this is acceptable fallout for now; I don't believe it will
cause any active problems, and as you say, you can get the bootloader to
set a command-line that excludes the frame-buffer if you want to solve
this. Do you agree?

Ok. Hopefully we can also use u-Boot soon.

Marc