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KVM: PPC: Book3S HV: Fix preempted vcore stolen time calculation 

Whenever a vcore state is VCORE_PREEMPT we need to be counting stolen
time for it.  This currently isn't the case when we have a vcore that
no longer has any runnable threads in it but still has a runner task,
so we do an explicit call to kvmppc_core_start_stolen() in that case.

Signed-off-by: Paul Mackerras <paulus@samba.org>
Signed-off-by: Alexander Graf <agraf@suse.de>
This commit is contained in:
Paul Mackerras 2015-07-16 17:11:14 +10:00 committed by Alexander Graf
parent 402813fe39
commit 563a1e93af
1 changed files with 7 additions and 2 deletions
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9
arch/powerpc/kvm/book3s_hv.c
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@ -2283,9 +2283,14 @@ static void post_guest_process(struct kvmppc_vcore *vc, bool is_master)
}
list_del_init(&vc->preempt_list);
if (!is_master) {
vc->vcore_state = vc->runner ? VCORE_PREEMPT : VCORE_INACTIVE;
if (still_running > 0)
if (still_running > 0) {
kvmppc_vcore_preempt(vc);
} else if (vc->runner) {
vc->vcore_state = VCORE_PREEMPT;
kvmppc_core_start_stolen(vc);
} else {
vc->vcore_state = VCORE_INACTIVE;
}
if (vc->n_runnable > 0 && vc->runner == NULL) {
/* make sure there's a candidate runner awake */
vcpu = list_first_entry(&vc->runnable_threads,