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| author | Gleb Natapov <gleb@redhat.com> | 2009-08-24 11:54:26 +0300 |
|---|---|---|
| committer | Avi Kivity <avi@redhat.com> | 2009-12-03 09:32:08 +0200 |
| commit | 680b3648ba89c44ac8d0316f78a0d6e147b88809 (patch) | |
| tree | b2b40034c4c33affef8b89822673cca835874651 /virt/kvm/kvm_main.c | |
| parent | eba0226bdfffe262e72b8360e4d0d12070e9a0f0 (diff) | |
| download | kernel_samsung_smdk4412-680b3648ba89c44ac8d0316f78a0d6e147b88809.tar.gz kernel_samsung_smdk4412-680b3648ba89c44ac8d0316f78a0d6e147b88809.tar.bz2 kernel_samsung_smdk4412-680b3648ba89c44ac8d0316f78a0d6e147b88809.zip | |
KVM: Drop kvm->irq_lock lock from irq injection path
The only thing it protects now is interrupt injection into lapic and
this can work lockless. Even now with kvm->irq_lock in place access
to lapic is not entirely serialized since vcpu access doesn't take
kvm->irq_lock.
Signed-off-by: Gleb Natapov <gleb@redhat.com>
Signed-off-by: Avi Kivity <avi@redhat.com>
Diffstat (limited to 'virt/kvm/kvm_main.c')
| -rw-r--r-- | virt/kvm/kvm_main.c | 2 |
1 files changed, 0 insertions, 2 deletions
diff --git a/virt/kvm/kvm_main.c b/virt/kvm/kvm_main.c index 6eca153e1a0..c12c95b1b64 100644 --- a/virt/kvm/kvm_main.c +++ b/virt/kvm/kvm_main.c @@ -137,7 +137,6 @@ static void kvm_assigned_dev_interrupt_work_handler(struct work_struct *work) interrupt_work); kvm = assigned_dev->kvm; - mutex_lock(&kvm->irq_lock); spin_lock_irq(&assigned_dev->assigned_dev_lock); if (assigned_dev->irq_requested_type & KVM_DEV_IRQ_HOST_MSIX) { struct kvm_guest_msix_entry *guest_entries = @@ -156,7 +155,6 @@ static void kvm_assigned_dev_interrupt_work_handler(struct work_struct *work) assigned_dev->guest_irq, 1); spin_unlock_irq(&assigned_dev->assigned_dev_lock); - mutex_unlock(&assigned_dev->kvm->irq_lock); } static irqreturn_t kvm_assigned_dev_intr(int irq, void *dev_id) |