[SPARC64]: Set appropriate max_cache_size.
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/arch/sparc64/kernel/smp.c b/arch/sparc64/kernel/smp.c
index 4e8cd79..f03d52d 100644
--- a/arch/sparc64/kernel/smp.c
+++ b/arch/sparc64/kernel/smp.c
@@ -1287,6 +1287,40 @@
return 0;
}
+static void __init smp_tune_scheduling(void)
+{
+ int instance, node;
+ unsigned int def, smallest = ~0U;
+
+ def = ((tlb_type == hypervisor) ?
+ (3 * 1024 * 1024) :
+ (4 * 1024 * 1024));
+
+ instance = 0;
+ while (!cpu_find_by_instance(instance, &node, NULL)) {
+ unsigned int val;
+
+ val = prom_getintdefault(node, "ecache-size", def);
+ if (val < smallest)
+ smallest = val;
+
+ instance++;
+ }
+
+ /* Any value less than 256K is nonsense. */
+ if (smallest < (256U * 1024U))
+ smallest = 256 * 1024;
+
+ max_cache_size = smallest;
+
+ if (smallest < 1U * 1024U * 1024U)
+ printk(KERN_INFO "Using max_cache_size of %uKB\n",
+ smallest / 1024U);
+ else
+ printk(KERN_INFO "Using max_cache_size of %uMB\n",
+ smallest / 1024U / 1024U);
+}
+
/* Constrain the number of cpus to max_cpus. */
void __init smp_prepare_cpus(unsigned int max_cpus)
{
@@ -1322,6 +1356,7 @@
}
smp_store_cpu_info(boot_cpu_id);
+ smp_tune_scheduling();
}
/* Set this up early so that things like the scheduler can init