: gets a new online cpu to use percpu_pagelist_fraction

If percpu_pagelist_fraction tunable is set then this patch allows a newly brought online cpu to use new settings for high and batch values in its per cpu pagelists.

@@ -1977,6 +1977,10 @@
 			goto bad;
 
 		setup_pageset(zone->pageset[cpu], zone_batchsize(zone));
+
+		if (percpu_pagelist_fraction) 
+			setup_pagelist_highmark(zone_pcp(zone, cpu), 
+			 	(zone->present_pages / percpu_pagelist_fraction));
 	}
 
 	return 0;

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