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[SPARC64]: Set appropriate max_cache_size.
Signed-off-by: David S. Miller <davem@davemloft.net>
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parent
1f4d4a7e8f
commit
9145bcf635
1 changed files with 35 additions and 0 deletions
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@ -1287,6 +1287,40 @@ int setup_profiling_timer(unsigned int multiplier)
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return 0;
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}
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static void __init smp_tune_scheduling(void)
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{
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int instance, node;
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unsigned int def, smallest = ~0U;
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def = ((tlb_type == hypervisor) ?
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(3 * 1024 * 1024) :
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(4 * 1024 * 1024));
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instance = 0;
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while (!cpu_find_by_instance(instance, &node, NULL)) {
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unsigned int val;
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val = prom_getintdefault(node, "ecache-size", def);
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if (val < smallest)
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smallest = val;
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instance++;
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}
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/* Any value less than 256K is nonsense. */
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if (smallest < (256U * 1024U))
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smallest = 256 * 1024;
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max_cache_size = smallest;
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if (smallest < 1U * 1024U * 1024U)
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printk(KERN_INFO "Using max_cache_size of %uKB\n",
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smallest / 1024U);
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else
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printk(KERN_INFO "Using max_cache_size of %uMB\n",
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smallest / 1024U / 1024U);
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}
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/* Constrain the number of cpus to max_cpus. */
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void __init smp_prepare_cpus(unsigned int max_cpus)
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{
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@ -1322,6 +1356,7 @@ void __init smp_prepare_cpus(unsigned int max_cpus)
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}
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smp_store_cpu_info(boot_cpu_id);
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smp_tune_scheduling();
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}
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/* Set this up early so that things like the scheduler can init
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