Commit 90321602 authored by Jan Beulich's avatar Jan Beulich Committed by Ingo Molnar
Browse files

x86: Unify "numa=" command line option handling 



In order to be able to suppress the use of SRAT tables that
32-bit Linux can't deal with (in one case known to lead to a
non-bootable system, unless disabling ACPI altogether), move the
"numa=" option handling to common code.

Signed-off-by: default avatarJan Beulich <jbeulich@novell.com>
Reviewed-by: default avatarThomas Renninger <trenn@suse.de>
Cc: Tejun Heo <tj@kernel.org>
Cc: Thomas Renninger <trenn@suse.de>
LKML-Reference: <4D36B581020000780002D0FF@vpn.id2.novell.com>
Signed-off-by: default avatarIngo Molnar <mingo@elte.hu>
parent 6b35eb9d

arch/x86/include/asm/numa_32.h

+2 −0
Original line number Diff line number Diff line 
#ifndef _ASM_X86_NUMA_32_H

#define _ASM_X86_NUMA_32_H



extern int numa_off;



extern int pxm_to_nid(int pxm);

extern void numa_remove_cpu(int cpu);

arch/x86/include/asm/numa_64.h

+1 −0
Original line number Diff line number Diff line
@@ -40,6 +40,7 @@ extern void __cpuinit numa_remove_cpu(int cpu); 
#ifdef CONFIG_NUMA_EMU

#define FAKE_NODE_MIN_SIZE	((u64)32 << 20)

#define FAKE_NODE_MIN_HASH_MASK	(~(FAKE_NODE_MIN_SIZE - 1UL))

void numa_emu_cmdline(char *);

#endif /* CONFIG_NUMA_EMU */

#else

static inline void init_cpu_to_node(void)		{ }

arch/x86/mm/numa.c

+22 −0
Original line number Diff line number Diff line
@@ -2,6 +2,28 @@ 
#include <linux/topology.h>

#include <linux/module.h>

#include <linux/bootmem.h>

#include <asm/numa.h>

#include <asm/acpi.h>



int __initdata numa_off;



static __init int numa_setup(char *opt)

{

	if (!opt)

		return -EINVAL;

	if (!strncmp(opt, "off", 3))

		numa_off = 1;

#ifdef CONFIG_NUMA_EMU

	if (!strncmp(opt, "fake=", 5))

		numa_emu_cmdline(opt + 5);

#endif

#ifdef CONFIG_ACPI_NUMA

	if (!strncmp(opt, "noacpi", 6))

		acpi_numa = -1;

#endif

	return 0;

}

early_param("numa", numa_setup);



/*

 * Which logical CPUs are on which nodes

arch/x86/mm/numa_64.c

+5 −19
Original line number Diff line number Diff line
@@ -30,7 +30,6 @@ s16 apicid_to_node[MAX_LOCAL_APIC] __cpuinitdata = { 
	[0 ... MAX_LOCAL_APIC-1] = NUMA_NO_NODE

};



int numa_off __initdata;

static unsigned long __initdata nodemap_addr;

static unsigned long __initdata nodemap_size;
@@ -263,6 +262,11 @@ static struct bootnode nodes[MAX_NUMNODES] __initdata; 
static struct bootnode physnodes[MAX_NUMNODES] __cpuinitdata;

static char *cmdline __initdata;



void __init numa_emu_cmdline(char *str)

{

	cmdline = str;

}



static int __init setup_physnodes(unsigned long start, unsigned long end,

					int acpi, int amd)

{
@@ -670,24 +674,6 @@ unsigned long __init numa_free_all_bootmem(void) 
	return pages;

}



static __init int numa_setup(char *opt)

{

	if (!opt)

		return -EINVAL;

	if (!strncmp(opt, "off", 3))

		numa_off = 1;

#ifdef CONFIG_NUMA_EMU

	if (!strncmp(opt, "fake=", 5))

		cmdline = opt + 5;

#endif

#ifdef CONFIG_ACPI_NUMA

	if (!strncmp(opt, "noacpi", 6))

		acpi_numa = -1;

#endif

	return 0;

}

early_param("numa", numa_setup);



#ifdef CONFIG_NUMA



static __init int find_near_online_node(int node)

arch/x86/mm/srat_32.c

+0 −1
Original line number Diff line number Diff line
@@ -59,7 +59,6 @@ static struct node_memory_chunk_s __initdata node_memory_chunk[MAXCHUNKS]; 
static int __initdata num_memory_chunks; /* total number of memory chunks */

static u8 __initdata apicid_to_pxm[MAX_APICID];



int numa_off __initdata;

int acpi_numa __initdata;



static __init void bad_srat(void)

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