lkml.org 
[lkml]   [2005]   [Nov]   [10]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: [PATCH 10/15] mm: atomic64 page counts
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.

-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/

\
 
 \ /
  Last update: 2005-11-10 22:46    [from the cache]
©2003-2011 Jasper Spaans