On Thu, 22 Jul 2010 15:40:56 +0200, Mark Brown <broonie@xxxxxxxxxxxxxxxxxxxxxxxxxxx> wrote:
On Thu, Jul 22, 2010 at 03:24:26PM +0200, Michał Nazarewicz wrote:
That's why command line is only intended as a way to overwrite the
defaults which are provided by the platform. In a final product,
configuration should be specified in platform code and not on
command line.
Yeah, agreed though I'm not convinced we can't do it via userspace
(initrd would give us a chance to do stuff early) or just kernel
rebuilds.
If there's any other easy way of overwriting platform's default I'm happy
to listen. :)
>It sounds like apart from the way you're passing the configuration in
>you're doing roughly what I'd suggest. I'd expect that in a lot of
>cases the map could be satisfied from the default region so there'd be
>no need to explicitly set one up.
Platform can specify something like:
cma_defaults("reg=20M", "*/*=reg");
which would make all the drivers share 20 MiB region by default.
Yes, exactly - probably you can even have a default region backed by
normal vmalloc() RAM which would at least be able to take a stab at
working by default.
Not sure what you mean here. vmalloc() allocated buffers cannot be used
with CMA since they are not contiguous in memory.
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