Create and use node_online_map.
This patch creates a node_online_map, much like cpu_online_map. It
also creates the standard helper functions, ie: node_online(),
num_online_nodes(), node_set_online(), node_set_offline().
This is used by driverFS topology to keep track of which Nodes
are in the system and online.
Cheers!
-Matt
diff -Nur --exclude-from=/usr/src/.dontdiff linux-2.5.44-base/arch/i386/kernel/numaq.c linux-2.5.44-node_online_map/arch/i386/kernel/numaq.c
--- linux-2.5.44-base/arch/i386/kernel/numaq.c Fri Oct 18 21:01:17 2002
+++ linux-2.5.44-node_online_map/arch/i386/kernel/numaq.c Wed Oct 23 12:14:49 2002
@@ -52,6 +52,7 @@
numnodes = 0;
for(node = 0; node < MAX_NUMNODES; node++) {
if(scd->quads_present31_0 & (1 << node)) {
+ node_set_online(node);
numnodes++;
eq = &scd->eq[node];
/* Convert to pages */
diff -Nur --exclude-from=/usr/src/.dontdiff linux-2.5.44-base/arch/i386/mach-generic/topology.c linux-2.5.44-node_online_map/arch/i386/mach-generic/topology.c
--- linux-2.5.44-base/arch/i386/mach-generic/topology.c Wed Oct 23 12:13:31 2002
+++ linux-2.5.44-node_online_map/arch/i386/mach-generic/topology.c Wed Oct 23 12:14:50 2002
@@ -38,13 +38,11 @@
struct i386_node node_devices[MAX_NUMNODES];
struct i386_memblk memblk_devices[MAX_NR_MEMBLKS];
-extern int numnodes;
-
static int __init topology_init(void)
{
int i;
- for (i = 0; i < numnodes; i++)
+ for (i = 0; i < num_online_nodes(); i++)
arch_register_node(i);
for (i = 0; i < num_online_cpus(); i++)
arch_register_cpu(i);
diff -Nur --exclude-from=/usr/src/.dontdiff linux-2.5.44-base/include/linux/mmzone.h linux-2.5.44-node_online_map/include/linux/mmzone.h
--- linux-2.5.44-base/include/linux/mmzone.h Wed Oct 23 12:13:31 2002
+++ linux-2.5.44-node_online_map/include/linux/mmzone.h Wed Oct 23 12:14:50 2002
@@ -263,10 +263,25 @@
#endif /* !CONFIG_DISCONTIGMEM */
+extern DECLARE_BITMAP(node_online_map, MAX_NUMNODES);
extern DECLARE_BITMAP(memblk_online_map, MAX_NR_MEMBLKS);
#if defined(CONFIG_DISCONTIGMEM) || defined(CONFIG_NUMA)
+#define node_online(node) test_bit(node, node_online_map)
+#define node_set_online(node) set_bit(node, node_online_map)
+#define node_set_offline(node) clear_bit(node, node_online_map)
+static inline unsigned int num_online_nodes(void)
+{
+ int i, num = 0;
+
+ for(i = 0; i < MAX_NUMNODES; i++){
+ if (node_online(i))
+ num++;
+ }
+ return num;
+}
+
#define memblk_online(memblk) test_bit(memblk, memblk_online_map)
#define memblk_set_online(memblk) set_bit(memblk, memblk_online_map)
#define memblk_set_offline(memblk) clear_bit(memblk, memblk_online_map)
@@ -283,6 +298,14 @@
#else /* !CONFIG_DISCONTIGMEM && !CONFIG_NUMA */
+#define node_online(node) \
+ ({ BUG_ON((node) != 0); test_bit(node, node_online_map); })
+#define node_set_online(node) \
+ ({ BUG_ON((node) != 0); set_bit(node, node_online_map); })
+#define node_set_offline(node) \
+ ({ BUG_ON((node) != 0); clear_bit(node, node_online_map); })
+#define num_online_nodes() 1
+
#define memblk_online(memblk) \
({ BUG_ON((memblk) != 0); test_bit(memblk, memblk_online_map); })
#define memblk_set_online(memblk) \
diff -Nur --exclude-from=/usr/src/.dontdiff linux-2.5.44-base/mm/page_alloc.c linux-2.5.44-node_online_map/mm/page_alloc.c
--- linux-2.5.44-base/mm/page_alloc.c Wed Oct 23 12:13:31 2002
+++ linux-2.5.44-node_online_map/mm/page_alloc.c Wed Oct 23 12:14:50 2002
@@ -28,6 +28,7 @@
#include <asm/topology.h>
+DECLARE_BITMAP(node_online_map, MAX_NUMNODES);
DECLARE_BITMAP(memblk_online_map, MAX_NR_MEMBLKS);
struct pglist_data *pgdat_list;
unsigned long totalram_pages;
-
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This archive was generated by hypermail 2b29 : Wed Oct 23 2002 - 22:01:06 EST