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authorTony Luck <tony.luck@intel.com>2010-05-27 15:35:13 -0700
committerTony Luck <tony.luck@intel.com>2010-05-27 15:35:13 -0700
commit4ec37de89d8c758ee8115e0e64b3f994910789ee (patch)
tree3c45c8f93054699a5245031919da7776b243ebf1 /arch
parentcc106eb35ed4abea675bce0d8fe40a46ff0b4a72 (diff)
[IA64] Fix build breakage
In commit 0ac0c0d0f837c499afd02a802f9cf52d3027fa3b cpusets: randomize node rotor used in cpuset_mem_spread_node() Jack Steiner fixed a problem with too many small tasks being assigned to node 0. Copy his code to ia64 to avoid build error. arch/ia64/kernel/smpboot.c:641: error: ‘cpu_to_node_map’ undeclared (first use in this function) In commit 3bccd996276b108c138e8176793a26ecef54d573 numa: ia64: use generic percpu var numa_node_id() implementation Lee Schermerhorn added some set_numa_node() calls - but these only work on CONFIG_NUMA=y configurations. Surround the calls with #ifdef CONFIG_NUMA Signed-off-by: Tony Luck <tony.luck@intel.com>
Diffstat (limited to 'arch')
-rw-r--r--arch/ia64/kernel/smpboot.c4
-rw-r--r--arch/ia64/mm/numa.c17
2 files changed, 21 insertions, 0 deletions
diff --git a/arch/ia64/kernel/smpboot.c b/arch/ia64/kernel/smpboot.c
index 518e876a410d..6a1380e90f87 100644
--- a/arch/ia64/kernel/smpboot.c
+++ b/arch/ia64/kernel/smpboot.c
@@ -390,11 +390,13 @@ smp_callin (void)
fix_b0_for_bsp();
+#ifdef CONFIG_NUMA
/*
* numa_node_id() works after this.
*/
set_numa_node(cpu_to_node_map[cpuid]);
set_numa_mem(local_memory_node(cpu_to_node_map[cpuid]));
+#endif
ipi_call_lock_irq();
spin_lock(&vector_lock);
@@ -638,7 +640,9 @@ void __devinit smp_prepare_boot_cpu(void)
{
cpu_set(smp_processor_id(), cpu_online_map);
cpu_set(smp_processor_id(), cpu_callin_map);
+#ifdef CONFIG_NUMA
set_numa_node(cpu_to_node_map[smp_processor_id()]);
+#endif
per_cpu(cpu_state, smp_processor_id()) = CPU_ONLINE;
paravirt_post_smp_prepare_boot_cpu();
}
diff --git a/arch/ia64/mm/numa.c b/arch/ia64/mm/numa.c
index 3efea7d0a351..2437718bd6b1 100644
--- a/arch/ia64/mm/numa.c
+++ b/arch/ia64/mm/numa.c
@@ -17,6 +17,7 @@
#include <linux/init.h>
#include <linux/bootmem.h>
#include <linux/module.h>
+#include <linux/random.h>
#include <asm/mmzone.h>
#include <asm/numa.h>
@@ -50,6 +51,22 @@ paddr_to_nid(unsigned long paddr)
return (i < num_node_memblks) ? node_memblk[i].nid : (num_node_memblks ? -1 : 0);
}
+/*
+ * Return the bit number of a random bit set in the nodemask.
+ * (returns -1 if nodemask is empty)
+ */
+int __node_random(const nodemask_t *maskp)
+{
+ int w, bit = -1;
+
+ w = nodes_weight(*maskp);
+ if (w)
+ bit = bitmap_ord_to_pos(maskp->bits,
+ get_random_int() % w, MAX_NUMNODES);
+ return bit;
+}
+EXPORT_SYMBOL(__node_random);
+
#if defined(CONFIG_SPARSEMEM) && defined(CONFIG_NUMA)
/*
* Because of holes evaluate on section limits.

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