From 56028d0861e48f7cc9c573d79f2d8a0a933a2bba Mon Sep 17 00:00:00 2001 From: Gleb Natapov Date: Sun, 17 Oct 2010 18:13:42 +0200 Subject: KVM: Retry fault before vmentry When page is swapped in it is mapped into guest memory only after guest tries to access it again and generate another fault. To save this fault we can map it immediately since we know that guest is going to access the page. Do it only when tdp is enabled for now. Shadow paging case is more complicated. CR[034] and EFER registers should be switched before doing mapping and then switched back. Acked-by: Rik van Riel Signed-off-by: Gleb Natapov Signed-off-by: Marcelo Tosatti --- virt/kvm/async_pf.c | 2 ++ 1 file changed, 2 insertions(+) (limited to 'virt') diff --git a/virt/kvm/async_pf.c b/virt/kvm/async_pf.c index 857d63431cb..e97eae965a4 100644 --- a/virt/kvm/async_pf.c +++ b/virt/kvm/async_pf.c @@ -132,6 +132,8 @@ void kvm_check_async_pf_completion(struct kvm_vcpu *vcpu) 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); list_del(&work->queue); -- cgit v1.2.3