On 04/05/2013 01:47:12 PM, Wolfgang Denk wrote:
Dear Rob,
In message 515F1504.4090705@gmail.com you wrote:
If the stack is all of RAM, then what address should the initrd
and dtb
be copied to?
Why do they have to be copied at all? Why cannot they remain
where
they have been loaded in the firtst place? The memcpy just costs
time,
which is a precious resource. Leave it to the user to find a reasonable location in RAM where he loads the data, and don't mess with it.
I've got no freaking idea! I do turn that crap off in my environment with initrd_high=0xffffffff. But the default operation is to copy
it.
Scott, Andy: I think I remember that some architectures really _need_ LMB - can you please shed a bit ligh on which these are, and why? And why it is enabled everywhere?
Also, any information about the underlying design, intended memory map etc. would be highly welcome.
CCing Kumar, who added a lot of the lmb stuff -- but it looks like ramdisk copying predated lmb.
-Scott