>From 4858a5c47c5dce88a62a6edf427d8709f3ebda15 Mon Sep 17 00:00:00 2001 From: Xiantao Zhang <xiantao.zhang@xxxxxxxxx> Date: Thu, 23 Oct 2008 15:03:38 +0800 Subject: [PATCH] KVM: ia64: kvm halt logic doesn't need lock to protect. 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: Xiantao Zhang <xiantao.zhang@xxxxxxxxx> --- arch/ia64/kvm/kvm-ia64.c | 2 -- 1 files changed, 0 insertions(+), 2 deletions(-) diff --git a/arch/ia64/kvm/kvm-ia64.c b/arch/ia64/kvm/kvm-ia64.c index 6b1e31b..93c7f18 100644 --- a/arch/ia64/kvm/kvm-ia64.c +++ b/arch/ia64/kvm/kvm-ia64.c @@ -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; -- 1.6.0
Attachment:
0003-KVM-ia64-kvm-halt-logic-doesn-t-need-lock-to-prote.patch
Description: 0003-KVM-ia64-kvm-halt-logic-doesn-t-need-lock-to-prote.patch
