Hi,
On sparc64 we dont care about the different memory zones and iterating
through them all over the place only serves to waste CPU. I suspect this
would be the case with some other architectures but for the moment I
have just enabled it for sparc64.
With this patch I get close to a 1% improvement in dbench on the dual
ultra60.
Anton
diff -ru linux/include/linux/mmzone.h linux_work/include/linux/mmzone.h
--- linux/include/linux/mmzone.h Thu Mar 15 19:03:47 2001
+++ linux_work/include/linux/mmzone.h Tue Mar 13 18:46:59 2001
@@ -63,7 +63,19 @@
#define ZONE_DMA 0
#define ZONE_NORMAL 1
#define ZONE_HIGHMEM 2
+#ifdef __sparc_v9__
+#define MAX_NR_ZONES 1
+#define ZONE_NAMES { "DMA" }
+#define ZONE_BALANCE_RATIO { 32 }
+#define ZONE_BALANCE_MIN { 10 }
+#define ZONE_BALANCE_MAX { 255 }
+#else
#define MAX_NR_ZONES 3
+#define ZONE_NAMES { "DMA", "Normal", "HighMem" }
+#define ZONE_BALANCE_RATIO { 32, 128, 128 }
+#define ZONE_BALANCE_MIN { 10, 10, 10 }
+#define ZONE_BALANCE_MAX { 255, 255, 255 }
+#endif
/*
* One allocation request operates on a zonelist. A zonelist
diff -ru linux/mm/page_alloc.c linux_work/mm/page_alloc.c
--- linux/mm/page_alloc.c Mon Mar 12 13:33:02 2001
+++ linux_work/mm/page_alloc.c Mon Mar 12 13:00:08 2001
@@ -23,10 +23,10 @@
int nr_inactive_dirty_pages;
pg_data_t *pgdat_list;
-static char *zone_names[MAX_NR_ZONES] = { "DMA", "Normal", "HighMem" };
-static int zone_balance_ratio[MAX_NR_ZONES] = { 32, 128, 128, };
-static int zone_balance_min[MAX_NR_ZONES] = { 10 , 10, 10, };
-static int zone_balance_max[MAX_NR_ZONES] = { 255 , 255, 255, };
+static char *zone_names[MAX_NR_ZONES] = ZONE_NAMES;
+static int zone_balance_ratio[MAX_NR_ZONES] = ZONE_BALANCE_RATIO;
+static int zone_balance_min[MAX_NR_ZONES] = ZONE_BALANCE_MIN;
+static int zone_balance_max[MAX_NR_ZONES] = ZONE_BALANCE_MAX;
struct list_head active_list;
struct list_head inactive_dirty_list;
-
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This archive was generated by hypermail 2b29 : Thu Mar 15 2001 - 21:00:17 EST