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

Stephen Warren swarren at nvidia.com
Tue Nov 22 11:25:03 EST 2011

Marc Dietrich wrote at Tuesday, November 22, 2011 3:42 AM:
> On Monday 21 November 2011 14:44:07 Stephen Warren wrote:
> > 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?


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