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authorGleb Natapov <gleb@redhat.com>2010-10-17 18:13:42 +0200
committerAvi Kivity <avi@redhat.com>2011-01-12 11:23:06 +0200
commit56028d0861e48f7cc9c573d79f2d8a0a933a2bba (patch)
treefa42d19f235c585c6514337a26db9641780ac759 /virt
parentaf585b921e5d1e919947c4b1164b59507fe7cd7b (diff)
downloadlinux-2.6.38-lt-ux500-56028d0861e48f7cc9c573d79f2d8a0a933a2bba.tar.gz
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 <riel@redhat.com> Signed-off-by: Gleb Natapov <gleb@redhat.com> Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
Diffstat (limited to 'virt')
-rw-r--r--virt/kvm/async_pf.c2
1 files changed, 2 insertions, 0 deletions
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);