[EMAIL PROTECTED] said:
> However, currently, the rounding can't be 0.5G, it must be 0.25G with the 
> current code, and it's still fragile if the host code is changed.
>
> (arch/i386/Kconfig)
> config PAGE_OFFSET
>         hex
>         default 0xB0000000 if VMSPLIT_3G_OPT
>         default 0x78000000 if VMSPLIT_2G
>         default 0x40000000 if VMSPLIT_1G
>         default 0xC0000000

Yes, I don't think other choices are too unlikely in the future.
0xB0000000 was only chosen because it prevents a typical 32-bit machine
with 1G of ram from having 1/8 of it in a little 128M highmem zone. In
the future, "typical" could likely be something else.

Jason



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