Messages in this thread | | | Date | Tue, 16 Oct 2007 20:22:55 -0700 (PDT) | From | David Rientjes <> | Subject | Re: [PATCH 4/6] Have zonelist contains structs with both a zone pointer and zone_idx |
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On Fri, 28 Sep 2007, Mel Gorman wrote:
> > Filtering zonelists requires very frequent use of zone_idx(). This is costly > as it involves a lookup of another structure and a substraction operation. As > the zone_idx is often required, it should be quickly accessible. The node > idx could also be stored here if it was found that accessing zone->node is > significant which may be the case on workloads where nodemasks are heavily > used. > > This patch introduces a struct zoneref to store a zone pointer and a zone > index. The zonelist then consists of an array of this struct zonerefs which > are looked up as necessary. Helpers are given for accessing the zone index > as well as the node index. > > [kamezawa.hiroyu@jp.fujitsu.com: Suggested struct zoneref instead of embedding information in pointers] > Signed-off-by: Mel Gorman <mel@csn.ul.ie> > Acked-by: Christoph Lameter <clameter@sgi.com>
OOM locking looks good, thanks.
Acked-by: David Rientjes <rientjes@google.com> - 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/
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