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KVM guest: Move a printk that's using the clock before it's ready 

Fix a hang during SMP kernel boot on KVM that showed up
after commit 489fb490db
(2.6.35) and 59aab522154a2f17b25335b63c1cf68a51fb6ae0
(2.6.34.1). The problem only occurs when
CONFIG_PRINTK_TIME is set.

KVM-Stable-Tag.
Signed-off-by: Arjan Koers <0h61vkll2ly8@xutrox.com>
Signed-off-by: Avi Kivity <avi@redhat.com>
This commit is contained in:
Arjan Koers 2010-08-02 23:35:28 +02:00 committed by Avi Kivity
parent c285545f81
commit 19b6a85b78
1 changed files with 4 additions and 2 deletions
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6
arch/x86/kernel/kvmclock.c
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@ -128,13 +128,15 @@ static struct clocksource kvm_clock = {
static int kvm_register_clock(char *txt)
{
int cpu = smp_processor_id();
int low, high;
int low, high, ret;
low = (int)__pa(&per_cpu(hv_clock, cpu)) | 1;
high = ((u64)__pa(&per_cpu(hv_clock, cpu)) >> 32);
ret = native_write_msr_safe(msr_kvm_system_time, low, high);
printk(KERN_INFO "kvm-clock: cpu %d, msr %x:%x, %s\n",
cpu, high, low, txt);
return native_write_msr_safe(msr_kvm_system_time, low, high);
return ret;
}
#ifdef CONFIG_X86_LOCAL_APIC