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| author | Tejun Heo <tj@kernel.org> | 2011-01-23 13:37:40 (GMT) |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2011-01-28 13:54:09 (GMT) |
| commit | 645a79195f66eb68ef3ab2b21d9829ac3aa085a9 (patch) | |
| tree | 5808c94ad0371f70a391e1e77baf12465969e19c /arch/x86/kernel/smpboot.c | |
| parent | bbc9e2f452d9c4b166d1f9a78d941d80173312fe (diff) | |
| download | linux-645a79195f66eb68ef3ab2b21d9829ac3aa085a9.tar.xz | |
x86: Unify CPU -> NUMA node mapping between 32 and 64bit
Unlike 64bit, 32bit has been using its own cpu_to_node_map[] for
CPU -> NUMA node mapping. Replace it with early_percpu variable
x86_cpu_to_node_map and share the mapping code with 64bit.
* USE_PERCPU_NUMA_NODE_ID is now enabled for 32bit too.
* x86_cpu_to_node_map and numa_set/clear_node() are moved from
numa_64 to numa. For now, on 32bit, x86_cpu_to_node_map is initialized
with 0 instead of NUMA_NO_NODE. This is to avoid introducing unexpected
behavior change and will be updated once init path is unified.
* srat_detect_node() is now enabled for x86_32 too. It calls
numa_set_node() and initializes the mapping making explicit
cpu_to_node_map[] updates from map/unmap_cpu_to_node() unnecessary.
Signed-off-by: Tejun Heo <tj@kernel.org>
Cc: eric.dumazet@gmail.com
Cc: yinghai@kernel.org
Cc: brgerst@gmail.com
Cc: gorcunov@gmail.com
Cc: penberg@kernel.org
Cc: shaohui.zheng@intel.com
Cc: rientjes@google.com
LKML-Reference: <1295789862-25482-15-git-send-email-tj@kernel.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Cc: David Rientjes <rientjes@google.com>
Diffstat (limited to 'arch/x86/kernel/smpboot.c')
| -rw-r--r-- | arch/x86/kernel/smpboot.c | 6 |
1 files changed, 0 insertions, 6 deletions
diff --git a/arch/x86/kernel/smpboot.c b/arch/x86/kernel/smpboot.c index b7cfce5..2c20382 100644 --- a/arch/x86/kernel/smpboot.c +++ b/arch/x86/kernel/smpboot.c @@ -133,16 +133,11 @@ EXPORT_PER_CPU_SYMBOL(cpu_info); atomic_t init_deasserted; #if defined(CONFIG_NUMA) && defined(CONFIG_X86_32) -/* which node each logical CPU is on */ -int cpu_to_node_map[NR_CPUS] __read_mostly = { [0 ... NR_CPUS-1] = 0 }; -EXPORT_SYMBOL(cpu_to_node_map); - /* set up a mapping between cpu and node. */ static void map_cpu_to_node(int cpu, int node) { printk(KERN_INFO "Mapping cpu %d to node %d\n", cpu, node); cpumask_set_cpu(cpu, node_to_cpumask_map[node]); - cpu_to_node_map[cpu] = node; } /* undo a mapping between cpu and node. */ @@ -153,7 +148,6 @@ static void unmap_cpu_to_node(int cpu) printk(KERN_INFO "Unmapping cpu %d from all nodes\n", cpu); for (node = 0; node < MAX_NUMNODES; node++) cpumask_clear_cpu(cpu, node_to_cpumask_map[node]); - cpu_to_node_map[cpu] = 0; } #else /* !(CONFIG_NUMA && CONFIG_X86_32) */ #define map_cpu_to_node(cpu, node) ({}) |