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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)
commitd98d07ca7e0347d712d54a865af323c4aee04bc2
tree2de57537b6c789cb583262d381c92d2640defe0dtree | snapshot
parentb48aa97e38206a84bf8485e7c553412274708ce5commit | diff
KVM: x86: update pvclock area conditionally, on cpu migration

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>
arch/x86/kvm/x86.c diff | blob | history
Linux Kernel Source Tree.