Re: 2G memory split

[Gerd Hoffmann <kraxel@suse.de>]

  Hi,

> 0xb0000000 is a much better default, but I didn't think that would fly
> as a patch.
I think that will not fly with CONFIG_X86_PAE.  In PAE mode the 3rd pmd 
 (for the 0xc0000000 => 0xffffffff kernel address range) is shared, 
anything but 0xc000000 most likely needs some more hackery than just 
changing PAGE_OFFSET.  As the whole point of this split patchery is to 
avoid highmem in the first place it maybe makes sense to have some 
"optimize for 1/2/4/more GB main memory" config option which in turn 
picks sane PAGE_OFFSET+HIGHMEM+PAE settings?
cheers,

  Gerd

--
Gerd 'just married' Hoffmann <kraxel@suse.de>
I'm the hacker formerly known as Gerd Knorr.
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