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Commit 89b08200 authored by Glauber Costa's avatar Glauber Costa Committed by Ingo Molnar
Browse files

x86: make x86_64 accept the max_cpus parameter 



The parameter passing parsing is done in the common smpboot.c

Signed-off-by: default avatarGlauber Costa <gcosta@redhat.com>
Signed-off-by: default avatarIngo Molnar <mingo@elte.hu>
parent 69c18c15

arch/x86/kernel/mpparse_64.c

+7 −0
Original line number Diff line number Diff line
@@ -32,6 +32,7 @@ 


/* Have we found an MP table */

int smp_found_config;

unsigned int __cpuinitdata maxcpus = NR_CPUS;



/*

 * Various Linux-internal data structures created from the
@@ -115,6 +116,12 @@ static void __cpuinit MP_processor_info(struct mpc_config_processor *m) 
		return;

	}



	if (num_processors >= maxcpus) {

		printk(KERN_WARNING "WARNING: maxcpus limit of %i reached."

			" Processor ignored.\n", maxcpus);

		return;

	}



	num_processors++;

	cpus_complement(tmp_map, cpu_present_map);

	cpu = first_cpu(tmp_map);

arch/x86/kernel/smpboot.c

+12 −0
Original line number Diff line number Diff line
@@ -268,3 +268,15 @@ void __cpu_die(unsigned int cpu) 
}

#endif



/*

 * If the BIOS enumerates physical processors before logical,

 * maxcpus=N at enumeration-time can be used to disable HT.

 */

static int __init parse_maxcpus(char *arg)

{

	extern unsigned int maxcpus;



	maxcpus = simple_strtoul(arg, NULL, 0);

	return 0;

}

early_param("maxcpus", parse_maxcpus);

arch/x86/kernel/smpboot_32.c

+0 −13
Original line number Diff line number Diff line
@@ -1113,16 +1113,3 @@ void __init smp_intr_init(void) 
	/* IPI for generic function call */

	set_intr_gate(CALL_FUNCTION_VECTOR, call_function_interrupt);

}
 


/*

 * If the BIOS enumerates physical processors before logical,

 * maxcpus=N at enumeration-time can be used to disable HT.

 */

static int __init parse_maxcpus(char *arg)

{

	extern unsigned int maxcpus;



	maxcpus = simple_strtoul(arg, NULL, 0);

	return 0;

}

early_param("maxcpus", parse_maxcpus);