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author | Yinghai Lu <yinghai@kernel.org> | 2009-05-15 13:59:37 -0700 |
---|---|---|
committer | Ingo Molnar <mingo@elte.hu> | 2009-05-18 09:21:04 +0200 |
commit | 7c43769a9776141ec23ca81a1bdd5a9c0512f165 (patch) | |
tree | e24d99a84d76386b0bf910152d1841853857e63f /arch/x86/include/asm | |
parent | 888a589f6be07d624e21e2174d98375e9f95911b (diff) | |
download | op-kernel-dev-7c43769a9776141ec23ca81a1bdd5a9c0512f165.zip op-kernel-dev-7c43769a9776141ec23ca81a1bdd5a9c0512f165.tar.gz |
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>
Diffstat (limited to 'arch/x86/include/asm')
-rw-r--r-- | arch/x86/include/asm/numa_64.h | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/arch/x86/include/asm/numa_64.h b/arch/x86/include/asm/numa_64.h index 7feff06..c4ae822 100644 --- a/arch/x86/include/asm/numa_64.h +++ b/arch/x86/include/asm/numa_64.h @@ -24,6 +24,13 @@ 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); |