From: Izik Eidus <[EMAIL PROTECTED]>
When we map a page, we check whether some other vcpu mapped it for us and if
so, bail out. But we should decrease the refcount on the page as we do so.
Signed-off-by: Izik Eidus <[EMAIL PROTECTED]>
Signed-off-by: Avi Kivity <[EMAIL PROTECTED]>
---
drivers/kvm/mmu.c | 4 +++-
1 files changed, 3 insertions(+), 1 deletions(-)
diff --git a/drivers/kvm/mmu.c b/drivers/kvm/mmu.c
index 87d8e70..8add4d5 100644
--- a/drivers/kvm/mmu.c
+++ b/drivers/kvm/mmu.c
@@ -907,8 +907,10 @@ static int nonpaging_map(struct kvm_vcpu *vcpu, gva_t v,
hpa_t p)
pte = table[index];
was_rmapped = is_rmap_pte(pte);
- if (is_shadow_present_pte(pte) && is_writeble_pte(pte))
+ if (is_shadow_present_pte(pte) && is_writeble_pte(pte))
{
+ kvm_release_page(pfn_to_page(p >> PAGE_SHIFT));
return 0;
+ }
mark_page_dirty(vcpu->kvm, v >> PAGE_SHIFT);
page_header_update_slot(vcpu->kvm, table, v);
table[index] = p | PT_PRESENT_MASK | PT_WRITABLE_MASK |
--
1.5.3.7
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