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authorAshok Raj <ashok.raj@intel.com>2005-06-25 14:55:00 -0700
committerLinus Torvalds <torvalds@ppc970.osdl.org>2005-06-25 16:24:30 -0700
commit76e4f660d9f4c6d1bb473f72be2988c35eaca948 (patch)
tree3a0b3ae0cc12d6f0d96bf1f3b564f8470e0f72ae /arch/i386
parente6982c671c560da4a0bc5c908cbcbec12bd5991d (diff)
[PATCH] x86_64: CPU hotplug support
Experimental CPU hotplug patch for x86_64 ----------------------------------------- This supports logical CPU online and offline. - Test with maxcpus=1, and then kick other cpu's off to test if init code is all cleaned up. CONFIG_SCHED_SMT works as well. - idle threads are forked on demand from keventd threads for clean startup TBD: 1. Not tested on a real NUMA machine (tested with numa=fake=2) 2. Handle ACPI pieces for physical hotplug support. Signed-off-by: Ashok Raj <ashok.raj@intel.com> Acked-by: Andi Kleen <ak@muc.de> Acked-by: Zwane Mwaikambo <zwane@arm.linux.org.uk> Signed-off-by: Shaohua.li<shaohua.li@intel.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'arch/i386')
-rw-r--r--arch/i386/mach-default/topology.c15
1 files changed, 7 insertions, 8 deletions
diff --git a/arch/i386/mach-default/topology.c b/arch/i386/mach-default/topology.c
index 5b3e8817dae..23395fff35d 100644
--- a/arch/i386/mach-default/topology.c
+++ b/arch/i386/mach-default/topology.c
@@ -73,12 +73,11 @@ static int __init topology_init(void)
{
int i;
- for (i = 0; i < MAX_NUMNODES; i++) {
- if (node_online(i))
- arch_register_node(i);
- }
- for (i = 0; i < NR_CPUS; i++)
- if (cpu_possible(i)) arch_register_cpu(i);
+ for_each_online_node(i)
+ arch_register_node(i);
+
+ for_each_cpu(i)
+ arch_register_cpu(i);
return 0;
}
@@ -88,8 +87,8 @@ static int __init topology_init(void)
{
int i;
- for (i = 0; i < NR_CPUS; i++)
- if (cpu_possible(i)) arch_register_cpu(i);
+ for_each_cpu(i)
+ arch_register_cpu(i);
return 0;
}