Messages in this thread | | | Date | Thu, 10 Nov 2005 13:43:12 -0800 (PST) | From | Christoph Lameter <> | Subject | Re: [PATCH 10/15] mm: atomic64 page counts |
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On Wed, 9 Nov 2005, Andrew Morton wrote:
> > I'm quite pleased with the way it's worked out, but you were intending > > that the 64-bit arches should get along with 32-bit counts? Maybe. > > That seems reasonsable for file pages. For the ZERO_PAGE the count can do > whatever it wants, because we'd never free them up.
Frequent increments and decrements on the zero page count can cause a bouncing cacheline that may limit performance.
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