linux/arch/x86/include/asm/numa_64.h
Yinghai Lu 7c43769a97 x86, mm: Fix node_possible_map logic
Recently there were some changes to the meaning of node_possible_map,
and it is quite strange:

- the node without memory would be set in node_possible_map
- but some node with less NODE_MIN_SIZE will be kicked out of node_possible_map.

fix it by adding strict_setup_node_bootmem().

Also, remove unparse_node().

so result will be:

1. cpu_to_node() will return online node only (nearest one)
2. apicid_to_node() still returns the node that could be not online but is set
   in node_possible_map.
3. node_possible_map will include nodes that mem on it are less NODE_MIN_SIZE

v2: after move_cpus_to_node change.

[ Impact: get node_possible_map right ]

Signed-off-by: Yinghai Lu <yinghai@kernel.org>
Tested-by: Jack Steiner <steiner@sgi.com>
LKML-Reference: <4A0C49BE.6080800@kernel.org>
[ v3: various small cleanups and comment clarifications ]
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2009-05-18 09:21:04 +02:00

47 lines
1.3 KiB
C

#ifndef _ASM_X86_NUMA_64_H
#define _ASM_X86_NUMA_64_H
#include <linux/nodemask.h>
#include <asm/apicdef.h>
struct bootnode {
u64 start;
u64 end;
};
extern int compute_hash_shift(struct bootnode *nodes, int numblks,
int *nodeids);
#define ZONE_ALIGN (1UL << (MAX_ORDER+PAGE_SHIFT))
extern void numa_init_array(void);
extern int numa_off;
extern s16 apicid_to_node[MAX_LOCAL_APIC];
extern unsigned long numa_free_all_bootmem(void);
extern void setup_node_bootmem(int nodeid, unsigned long start,
unsigned long end);
#ifdef CONFIG_NUMA
/*
* Too small node sizes may confuse the VM badly. Usually they
* result from BIOS bugs. So dont recognize nodes as standalone
* NUMA entities that have less than this amount of RAM listed:
*/
#define NODE_MIN_SIZE (4*1024*1024)
extern void __init init_cpu_to_node(void);
extern void __cpuinit numa_set_node(int cpu, int node);
extern void __cpuinit numa_clear_node(int cpu);
extern void __cpuinit numa_add_cpu(int cpu);
extern void __cpuinit numa_remove_cpu(int cpu);
#else
static inline void init_cpu_to_node(void) { }
static inline void numa_set_node(int cpu, int node) { }
static inline void numa_clear_node(int cpu) { }
static inline void numa_add_cpu(int cpu, int node) { }
static inline void numa_remove_cpu(int cpu) { }
#endif
#endif /* _ASM_X86_NUMA_64_H */