Messages in this thread | | | Date | Tue, 18 Aug 2009 13:56:22 -0400 (EDT) | From | Christoph Lameter <> | Subject | Re: [PATCH 3/3] page-allocator: Move pcp static fields for high and batch off-pcp and onto the zone |
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On Tue, 18 Aug 2009, Mel Gorman wrote:
> On Tue, Aug 18, 2009 at 10:18:48AM -0400, Christoph Lameter wrote: > > > > This will increase the cache footprint for the hot code path. Could these > > new variable be moved next to zone fields that are already in use there? > > The pageset array is used f.e. > > > > pageset is ____cacheline_aligned_in_smp so putting pcp->high/batch near > it won't help in terms of cache footprint. This is why I located it near > watermarks because it's known they'll be needed at roughly the same time > pcp->high/batch would be normally accessed.
watermarks are not accessed from the hot code path in free_hot_cold page.
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