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[PATCH] cpu to node relationship fixup: map cpu to node

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Assume that a cpu is *physically* offlined at boot time...

Because smpboot.c::smp_boot_cpu_map() canoot find cpu's sapicid,
numa.c::build_cpu_to_node_map() cannot build cpu<->node map for
offlined cpu.

For such cpus, cpu_to_node map should be fixed at cpu-hot-add.
This mapping should be done before cpu onlining.

This patch also handles cpu hotremove case.

Signed-off-by: KAMEZAWA Hiroyuki <[email protected]>
Cc: "Luck, Tony" <[email protected]>
Cc: <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>
This commit is contained in:
KAMEZAWA Hiroyuki 2006-09-25 16:25:31 -07:00 • committed by Linus Torvalds
commit 3212fe1594
3 changed files with 40 additions and 4 deletions
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4
include/asm-ia64/numa.h
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@ -64,6 +64,10 @@ extern int paddr_to_nid(unsigned long paddr);
#define local_nodeid (cpu_to_node_map[smp_processor_id()])
extern void map_cpu_to_node(int cpu, int nid);
extern void unmap_cpu_from_node(int cpu, int nid);
#else /* !CONFIG_NUMA */
#define paddr_to_nid(addr) 0