Re: [PATCH] do firmware feature fixups after features are initialised

On Wed, 2007-07-11 at 13:06 +0200, Segher Boessenkool wrote:

quoted

There are two possibly solutions I see in the long run:

 - We could set the FW features earlier on pseries, though that is  
a bit
annoying because that means doing it before the device-tree is
unflattened.

 - We could constraint lmb_alloc to the first segment until the FW  
fixup
occurs, either within lmb_alloc itself, or fixup the callers such as
unflatten_device_tree, to pass an explicit limit.

c) use a different SLB handler during early boot;
d) preload some SLB entries at very early boot to cover
    the first 4GB or so.

d) sounds nice and simple, but will it work?

Nah, best to limit everything at boot to SLB 0. Thing is, 4G is not
enough, you may have more RAM and have allocations from the top.

Ben.