[IA64] Minimize per_cpu reservations.
This attached patch significantly shrinks boot memory allocation on ia64.
It does this by not allocating per_cpu areas for cpus that can never
exist.
In the case where acpi does not have any numa node description of the
cpus, I defaulted to assigning the first 32 round-robin on the known
nodes.. For the !CONFIG_ACPI I used for_each_possible_cpu().
Signed-off-by: Robin Holt <holt@sgi.com>
Signed-off-by: Tony Luck <tony.luck@intel.com>
diff --git a/arch/ia64/kernel/acpi.c b/arch/ia64/kernel/acpi.c
index 78f28d8..c7467f8 100644
--- a/arch/ia64/kernel/acpi.c
+++ b/arch/ia64/kernel/acpi.c
@@ -423,6 +423,7 @@
#define pxm_bit_set(bit) (set_bit(bit,(void *)pxm_flag))
#define pxm_bit_test(bit) (test_bit(bit,(void *)pxm_flag))
static struct acpi_table_slit __initdata *slit_table;
+cpumask_t early_cpu_possible_map = CPU_MASK_NONE;
static int get_processor_proximity_domain(struct acpi_srat_cpu_affinity *pa)
{
@@ -482,6 +483,7 @@
(pa->apic_id << 8) | (pa->local_sapic_eid);
/* nid should be overridden as logical node id later */
node_cpuid[srat_num_cpus].nid = pxm;
+ cpu_set(srat_num_cpus, early_cpu_possible_map);
srat_num_cpus++;
}
@@ -559,7 +561,7 @@
}
/* set logical node id in cpu structure */
- for (i = 0; i < srat_num_cpus; i++)
+ for_each_possible_early_cpu(i)
node_cpuid[i].nid = pxm_to_node(node_cpuid[i].nid);
printk(KERN_INFO "Number of logical nodes in system = %d\n",