Ed L Cashin wrote:
Yes! It's a tradeoff, and I know little about the specifics of that tradeoff. There's probably a lot of info in the archives of the linux-mm mailing list, though.
Actually, now that I understand the basics, I re-read the section covering pte_offset_map in Mel Gorman's book (p 50-51), and it makes a lot more sense now.
One thing he does say is that for 2.6, it's likely that PMDs will also be in high memory. I don't see a pmd_offset_map in the 2.6.5 kernel source, so I'm assuming that this change hasn't been incorporated yet. Does anyone know anything about this?
-- Timur Tabi Staff Software Engineer timur.tabi@xxxxxxxxxxx
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