[SPARC64]: Set appropriate max_cache_size. (9145bcf6) · Commits · e / devices / android_kernel_fairphone_FP4

arch/sparc64/kernel/smp.c

+35 −0

Original line number	Diff line number	Diff line
		@@ -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