>  - I don't think it's necessarily "system stability". The problem with
> large amounts of highmem ends up being that we end up using up almost
> all of the lowmem just to *track* the huge amount of highmem, and then
> we have so little lowmem that we suck at performance and have various
> random problems. So it's not just "system stability", it's more fluid
> than that.

FYI 32-bit Windows already limits to 16GB when 3G/1G split is used for a 
similar reason. (They default to 2G/2G split.)

Yuhong Bao                                        --
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