Re: [PATCH 2/2] of/fdt: skip unflattening of disabled nodes
From: Nicolas Pitre
Date: Thu Oct 05 2017 - 14:29:42 EST
On Tue, 3 Oct 2017, Frank Rowand wrote:
> On 10/03/17 11:46, Nicolas Pitre wrote:
> > On Tue, 3 Oct 2017, Rob Herring wrote:
> >> For static DT usecases, we don't need the disabled nodes and can skip
> >> unflattening. This saves a significant amount of RAM in memory constrained
> >> cases. In one example on STM32F469, the RAM usage goes from 118K to 26K.
> >> There are a few cases in the kernel that modify the status property
> >> dynamically. These all are changes from enabled to disabled, depend on
> >> OF_DYNAMIC or are not FDT based (PDT based).
> >> Cc: Nicolas Pitre <nicolas.pitre@xxxxxxxxxx>
> >> Cc: Frank Rowand <frowand.list@xxxxxxxxx>
> >> Signed-off-by: Rob Herring <robh@xxxxxxxxxx>
> > Tested-by: Nicolas Pitre <nico@xxxxxxxxxx>
> >> ---
> >> For more background, see this presentation from Nico:
> >> https://connect.linaro.org/resource/sfo17/sfo17-100/
> > Oh my ... this is horrible ...
> I found the presentation to be quite good and useful.
Thanks. I think the content is good. I'm just a terrible speaker.
> The Linaro site does not have the slides, could you please send
> me a copy?
I've asked for the slides to be uploaded to the site. I've sent you a
copy privately in the mean time.