c80d79d746
Current implementations define NODES_SHIFT in include/asm-xxx/numnodes.h for each arch. Its definition is sometimes configurable. Indeed, ia64 defines 5 NODES_SHIFT values in the current git tree. But it looks a bit messy. SGI-SN2(ia64) system requires 1024 nodes, and the number of nodes already has been changeable by config. Suitable node's number may be changed in the future even if it is other architecture. So, I wrote configurable node's number. This patch set defines just default value for each arch which needs multi nodes except ia64. But, it is easy to change to configurable if necessary. On ia64 the number of nodes can be already configured in generic ia64 and SN2 config. But, NODES_SHIFT is defined for DIG64 and HP'S machine too. So, I changed it so that all platforms can be configured via CONFIG_NODES_SHIFT. It would be simpler. See also: http://marc.theaimsgroup.com/?l=linux-kernel&m=114358010523896&w=2 Signed-off-by: Yasunori Goto <y-goto@jp.fujitsu.com> Cc: Hirokazu Takata <takata@linux-m32r.org> Cc: "Luck, Tony" <tony.luck@intel.com> Cc: Andi Kleen <ak@muc.de> Cc: Paul Mackerras <paulus@samba.org> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Ivan Kokshaysky <ink@jurassic.park.msu.ru> Cc: Richard Henderson <rth@twiddle.net> Cc: Kyle McMartin <kyle@mcmartin.ca> Cc: Russell King <rmk@arm.linux.org.uk> Cc: Ralf Baechle <ralf@linux-mips.org> Cc: Jack Steiner <steiner@sgi.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
39 lines
841 B
C
39 lines
841 B
C
#ifndef _ASM_X8664_NUMA_H
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#define _ASM_X8664_NUMA_H 1
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#include <linux/nodemask.h>
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struct bootnode {
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u64 start,end;
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};
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extern int compute_hash_shift(struct bootnode *nodes, int numnodes);
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extern int pxm_to_node(int nid);
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#define ZONE_ALIGN (1UL << (MAX_ORDER+PAGE_SHIFT))
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extern void numa_add_cpu(int cpu);
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extern void numa_init_array(void);
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extern int numa_off;
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extern void numa_set_node(int cpu, int node);
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extern void srat_reserve_add_area(int nodeid);
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extern int hotadd_percent;
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extern unsigned char apicid_to_node[256];
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#ifdef CONFIG_NUMA
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extern void __init init_cpu_to_node(void);
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static inline void clear_node_cpumask(int cpu)
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{
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clear_bit(cpu, &node_to_cpumask[cpu_to_node(cpu)]);
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}
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#else
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#define init_cpu_to_node() do {} while (0)
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#define clear_node_cpumask(cpu) do {} while (0)
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#endif
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#define NUMA_NO_NODE 0xff
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#endif
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