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[Xen-devel] [PATCH] Skip vcpu_hotplug for VCPU 0 in smp_resume
| To: | xen-devel@xxxxxxxxxxxxxxxxxxx |
|---|---|
| Subject: | [Xen-devel] [PATCH] Skip vcpu_hotplug for VCPU 0 in smp_resume |
| From: | Brendan Cully <brendan@xxxxxxxxx> |
| Date: | Tue, 31 Mar 2009 09:53:11 -0700 |
| Delivery-date: | Tue, 31 Mar 2009 09:54:41 -0700 |
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# HG changeset patch
# User Brendan Cully <brendan@xxxxxxxxx>
# Date 1238518139 25200
# Node ID ed51e0ec7b8c08b1f191af7f89e53302f855f7d7
# Parent 4c7eb2e71e9d9d94583336c022042ffaa3ba6481
Skip vcpu_hotplug for VCPU 0 in smp_resume.
This function can occasionally take up to 2 seconds to complete,
and smp_suspend also skips VCPU 0.
Signed-off-by: Brendan Cully <brendan@xxxxxxxxx>
diff --git a/drivers/xen/core/cpu_hotplug.c b/drivers/xen/core/cpu_hotplug.c
--- a/drivers/xen/core/cpu_hotplug.c
+++ b/drivers/xen/core/cpu_hotplug.c
@@ -144,8 +144,11 @@
{
unsigned int cpu;
- for_each_possible_cpu(cpu)
+ for_each_possible_cpu(cpu) {
+ if (cpu == 0)
+ continue;
vcpu_hotplug(cpu);
+ }
}
int cpu_up_check(unsigned int cpu)
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