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[SPARC64]: Set appropriate max_cache_size. 

Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
David S. Miller 2006-06-10 22:02:17 -07:00
parent 1f4d4a7e8f
commit 9145bcf635
1 changed files with 35 additions and 0 deletions
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35
arch/sparc64/kernel/smp.c
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@ -1287,6 +1287,40 @@ int setup_profiling_timer(unsigned int multiplier)
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 @@ void __init smp_prepare_cpus(unsigned int max_cpus)
}
smp_store_cpu_info(boot_cpu_id);
smp_tune_scheduling();
}
/* Set this up early so that things like the scheduler can init