diff options
| author | Alex Nixon <alex.nixon@citrix.com> | 2008-08-22 11:52:15 +0100 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2008-08-25 11:25:14 +0200 |
| commit | d68d82afd4c88e25763b23cd9cd4974573a3706f (patch) | |
| tree | 42a3fb93a5cef70db7ad01fda1ed0dc68dbe6110 /arch/x86/xen/spinlock.c | |
| parent | 8227dce7dc2cfdcc28ee0eadfb482a7ee77fba03 (diff) | |
| download | linux-d68d82afd4c88e25763b23cd9cd4974573a3706f.tar.bz2 | |
xen: implement CPU hotplugging
Note the changes from 2.6.18-xen CPU hotplugging:
A vcpu_down request from the remote admin via Xenbus both hotunplugs the
CPU, and disables it by removing it from the cpu_present map, and removing
its entry in /sys.
A vcpu_up request from the remote admin only re-enables the CPU, and does
not immediately bring the CPU up. A udev event is emitted, which can be
caught by the user if he wishes to automatically re-up CPUs when available,
or implement a more complex policy.
Signed-off-by: Alex Nixon <alex.nixon@citrix.com>
Acked-by: Jeremy Fitzhardinge <jeremy@goop.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'arch/x86/xen/spinlock.c')
| -rw-r--r-- | arch/x86/xen/spinlock.c | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/arch/x86/xen/spinlock.c b/arch/x86/xen/spinlock.c index d072823bc06d..dd71e3a021cd 100644 --- a/arch/x86/xen/spinlock.c +++ b/arch/x86/xen/spinlock.c @@ -357,6 +357,11 @@ void __cpuinit xen_init_lock_cpu(int cpu) printk("cpu %d spinlock event irq %d\n", cpu, irq); } +void xen_uninit_lock_cpu(int cpu) +{ + unbind_from_irqhandler(per_cpu(lock_kicker_irq, cpu), NULL); +} + void __init xen_init_spinlocks(void) { pv_lock_ops.spin_is_locked = xen_spin_is_locked; |