On Mon, 2007-04-02 at 19:36 +0200, Segher Boessenkool wrote:

quoted

quoted

quoted

The old 2.6.16 kernel handled memory statically and it was shown in 
the
device tree. The current kernel deals with the hypervisor and 
hotplugs
the memory, so we should just ignore anything that's reported in the
device-tree. This enables the current kernel to be booted from 2.6.16
without evil hacks in head_64.S to override the device-tree.

Surely when you are booted you already have some
memory plugged for you -- shouldn't that memory be
in the device tree?

See ps3_mm_init(), called from _probe_.

Yes sure, the hypervisor has given you some memory
already, and it tells you about it.

My point was it's not coming out of the device tree, it's just manually
lmb_add'ed.

My question remains: shouldn't Linux get that
information from the device tree, instead?  The
bootwrapper or bootloader can put it there.

Yes it _should_, but it doesn't.

cheers

-- 
Michael Ellerman
OzLabs, IBM Australia Development Lab

wwweb: http://michael.ellerman.id.au
phone: +61 2 6212 1183 (tie line 70 21183)

We do not inherit the earth from our ancestors,
we borrow it from our children. - S.M.A.R.T Person