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KVM: handle more completed apfs if possible 

If it's no need to inject async #PF to PV guest we can handle
more completed apfs at one time, so we can retry guest #PF
as early as possible

Signed-off-by: Xiao Guangrong <xiaoguangrong@cn.fujitsu.com>
Acked-by: Gleb Natapov <gleb@redhat.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
This commit is contained in:
Xiao Guangrong 2010-11-02 17:35:35 +08:00 committed by Avi Kivity
parent e6d53e3b0d
commit 15096ffcea
1 changed files with 16 additions and 16 deletions
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32
virt/kvm/async_pf.c
View File

@ -124,24 +124,24 @@ void kvm_check_async_pf_completion(struct kvm_vcpu *vcpu)
{
struct kvm_async_pf *work;
if (list_empty_careful(&vcpu->async_pf.done) ||
!kvm_arch_can_inject_async_page_present(vcpu))
return;
while (!list_empty_careful(&vcpu->async_pf.done) &&
kvm_arch_can_inject_async_page_present(vcpu)) {
spin_lock(&vcpu->async_pf.lock);
work = list_first_entry(&vcpu->async_pf.done, typeof(*work),
link);
list_del(&work->link);
spin_unlock(&vcpu->async_pf.lock);
spin_lock(&vcpu->async_pf.lock);
work = list_first_entry(&vcpu->async_pf.done, typeof(*work), link);
list_del(&work->link);
spin_unlock(&vcpu->async_pf.lock);
if (work->page)
kvm_arch_async_page_ready(vcpu, work);
kvm_arch_async_page_present(vcpu, work);
if (work->page)
kvm_arch_async_page_ready(vcpu, work);
kvm_arch_async_page_present(vcpu, work);
list_del(&work->queue);
vcpu->async_pf.queued--;
if (work->page)
put_page(work->page);
kmem_cache_free(async_pf_cache, work);
list_del(&work->queue);
vcpu->async_pf.queued--;
if (work->page)
put_page(work->page);
kmem_cache_free(async_pf_cache, work);
}
}
int kvm_setup_async_pf(struct kvm_vcpu *vcpu, gva_t gva, gfn_t gfn,