Acked-by: Robin Holt <holt@xxxxxxx> On Thu, Jun 04, 2009 at 07:23:15PM +0900, KOSAKI Motohiro wrote: ... > Actually, zone_reclaim_mode=1 mean "I dislike remote node allocation rather than > disk access", it makes performance improvement to HPC workload. > but it makes performance degression to desktop, file server and web server. I still disagree with this statement, but I don't care that much. Why not something more to the effect of: Setting zone_reclaim_mode=1 causes memory allocations on a nearly exhausted node to do direct reclaim within that node before attempting off-node allocations. For work loads where most pages are clean in page cache and easily reclaimed, this can result excessive disk activity versus a more fair node memory balance. If you disagree, don't respond, just ignore. ... > --- a/include/linux/topology.h > +++ b/include/linux/topology.h > @@ -54,12 +54,7 @@ int arch_update_cpu_topology(void); > #define node_distance(from,to) ((from) == (to) ? LOCAL_DISTANCE : REMOTE_DISTANCE) > #endif > #ifndef RECLAIM_DISTANCE > -/* > - * If the distance between nodes in a system is larger than RECLAIM_DISTANCE > - * (in whatever arch specific measurement units returned by node_distance()) > - * then switch on zone reclaim on boot. > - */ > -#define RECLAIM_DISTANCE 20 > +#define RECLAIM_DISTANCE INT_MAX Why remove this comment? It seems more-or-less a reasonable statement. Thanks, Robin -- To unsubscribe from this list: send the line "unsubscribe linux-ia64" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
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