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Commit 853dafb6 authored by Xiantao Zhang's avatar Xiantao Zhang Committed by Avi Kivity
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KVM: ia64: Remove lock held by halted vcpu 



Remove the lock protection for kvm halt logic, otherwise,
once other vcpus want to acquire the lock, and they have to
wait all vcpus are waken up from halt.

Signed-off-by: default avatarXiantao Zhang <xiantao.zhang@intel.com>
Signed-off-by: default avatarAvi Kivity <avi@redhat.com>
parent a917f7af

arch/ia64/kvm/kvm-ia64.c

+0 −2
Original line number Diff line number Diff line
@@ -439,7 +439,6 @@ int kvm_emulate_halt(struct kvm_vcpu *vcpu) 
		expires = div64_u64(itc_diff, cyc_per_usec);

		kt = ktime_set(0, 1000 * expires);



		down_read(&vcpu->kvm->slots_lock);

		vcpu->arch.ht_active = 1;

		hrtimer_start(p_ht, kt, HRTIMER_MODE_ABS);
@@ -452,7 +451,6 @@ int kvm_emulate_halt(struct kvm_vcpu *vcpu) 
			if (vcpu->arch.mp_state == KVM_MP_STATE_HALTED)

				vcpu->arch.mp_state =

					KVM_MP_STATE_RUNNABLE;

		up_read(&vcpu->kvm->slots_lock);



		if (vcpu->arch.mp_state != KVM_MP_STATE_RUNNABLE)

			return -EINTR;