diff options
| author | holt@sgi.com <holt@sgi.com> | 2008-04-03 15:17:13 -0500 |
|---|---|---|
| committer | Tony Luck <tony.luck@intel.com> | 2008-04-08 13:51:35 -0700 |
| commit | 2c6e6db41f01b6b4eb98809350827c9678996698 (patch) | |
| tree | 00438344c0ad599c1301db2abe32a4c2ee89b607 /arch/ia64/mm/discontig.c | |
| parent | 41bd26d67c41e325c6b9e56aadfe9dad8af9a565 (diff) | |
| download | kernel_samsung_smdk4412-2c6e6db41f01b6b4eb98809350827c9678996698.zip kernel_samsung_smdk4412-2c6e6db41f01b6b4eb98809350827c9678996698.tar.gz kernel_samsung_smdk4412-2c6e6db41f01b6b4eb98809350827c9678996698.tar.bz2 | |
[IA64] Minimize per_cpu reservations.
This attached patch significantly shrinks boot memory allocation on ia64.
It does this by not allocating per_cpu areas for cpus that can never
exist.
In the case where acpi does not have any numa node description of the
cpus, I defaulted to assigning the first 32 round-robin on the known
nodes.. For the !CONFIG_ACPI I used for_each_possible_cpu().
Signed-off-by: Robin Holt <holt@sgi.com>
Signed-off-by: Tony Luck <tony.luck@intel.com>
Diffstat (limited to 'arch/ia64/mm/discontig.c')
| -rw-r--r-- | arch/ia64/mm/discontig.c | 12 |
1 files changed, 4 insertions, 8 deletions
diff --git a/arch/ia64/mm/discontig.c b/arch/ia64/mm/discontig.c index 06c540a..6136a4c 100644 --- a/arch/ia64/mm/discontig.c +++ b/arch/ia64/mm/discontig.c @@ -104,7 +104,7 @@ static int __meminit early_nr_cpus_node(int node) { int cpu, n = 0; - for (cpu = 0; cpu < NR_CPUS; cpu++) + for_each_possible_early_cpu(cpu) if (node == node_cpuid[cpu].nid) n++; @@ -143,7 +143,7 @@ static void *per_cpu_node_setup(void *cpu_data, int node) #ifdef CONFIG_SMP int cpu; - for (cpu = 0; cpu < NR_CPUS; cpu++) { + for_each_possible_early_cpu(cpu) { if (node == node_cpuid[cpu].nid) { memcpy(__va(cpu_data), __phys_per_cpu_start, __per_cpu_end - __per_cpu_start); @@ -346,7 +346,7 @@ static void __init initialize_pernode_data(void) #ifdef CONFIG_SMP /* Set the node_data pointer for each per-cpu struct */ - for (cpu = 0; cpu < NR_CPUS; cpu++) { + for_each_possible_early_cpu(cpu) { node = node_cpuid[cpu].nid; per_cpu(cpu_info, cpu).node_data = mem_data[node].node_data; } @@ -494,13 +494,9 @@ void __cpuinit *per_cpu_init(void) int cpu; static int first_time = 1; - - if (smp_processor_id() != 0) - return __per_cpu_start + __per_cpu_offset[smp_processor_id()]; - if (first_time) { first_time = 0; - for (cpu = 0; cpu < NR_CPUS; cpu++) + for_each_possible_early_cpu(cpu) per_cpu(local_per_cpu_offset, cpu) = __per_cpu_offset[cpu]; } |