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KVM: x86: update pvclock area conditionally, on cpu migration
authorMarcelo Tosatti <mtosatti@redhat.com>
Wed, 28 Nov 2012 01:29:04 +0000 (23:29 -0200)
committerMarcelo Tosatti <mtosatti@redhat.com>
Wed, 28 Nov 2012 01:29:15 +0000 (23:29 -0200)
As requested by Glauber, do not update kvmclock area on vcpu->pcpu
migration, in case the host has stable TSC.

This is to reduce cacheline bouncing.

Acked-by: Glauber Costa <glommer@parallels.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>

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