lk/linux-kernel-test
1
0
Fork 0
Code Issues Pull Requests Releases Wiki Activity

[PATCH] x86_64: CPU hotplug support

Browse Source 
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>
This commit is contained in:
Ashok Raj
2005-06-25 14:55:00 -07:00
committed by Linus Torvalds
parent e6982c671c
commit 76e4f660d9
8 changed files with 280 additions and 28 deletions
Download Patch File Download Diff File Expand all files Collapse all files

15
arch/i386/mach-default/topology.c
View File

@@ -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;
}