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-rw-r--r--virt/kvm/kvm_main.c6
1 files changed, 5 insertions, 1 deletions
diff --git a/virt/kvm/kvm_main.c b/virt/kvm/kvm_main.c
index 439d3b4cd1a9..8495a01d1e41 100644
--- a/virt/kvm/kvm_main.c
+++ b/virt/kvm/kvm_main.c
@@ -3134,15 +3134,19 @@ out:
static void shrink_halt_poll_ns(struct kvm_vcpu *vcpu)
{
- unsigned int old, val, shrink;
+ unsigned int old, val, shrink, grow_start;
old = val = vcpu->halt_poll_ns;
shrink = READ_ONCE(halt_poll_ns_shrink);
+ grow_start = READ_ONCE(halt_poll_ns_grow_start);
if (shrink == 0)
val = 0;
else
val /= shrink;
+ if (val < grow_start)
+ val = 0;
+
vcpu->halt_poll_ns = val;
trace_kvm_halt_poll_ns_shrink(vcpu->vcpu_id, val, old);
}