[Xen-devel] [PATCH] Skip vcpu_hotplug for VCPU 0 in smp_resume

[Brendan Cully <brendan@xxxxxxxxx>]

# 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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