Re: [PATCH] mm: compaction: Abort compaction if too many pages areisolated and caller is asynchronous

[Andrea Arcangeli]

On Wed, Jun 01, 2011 at 06:58:09PM +0100, Mel Gorman wrote:
> Umm, HIGHMEM4G implies a two-level pagetable layout so where are
> things like _PAGE_BIT_SPLITTING being set when THP is enabled?

They should be set on the pgd, pud_offset/pgd_offset will just bypass.
The splitting bit shouldn't be special about it, the present bit
should work the same.
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