KVM: MMU: fix huge page adapted on non-PAE host
The huge page size is 4M on non-PAE host, but 2M page size is used in
transparent_hugepage_adjust(), so the page we get after adjust the
mapping level is not the head page, the BUG_ON() will be triggered
Signed-off-by: Xiao Guangrong <xiaoguangrong@linux.vnet.ibm.com>
Signed-off-by: Avi Kivity <avi@redhat.com>
diff --git a/arch/x86/kvm/mmu.c b/arch/x86/kvm/mmu.c
index 72102e0..be3cea4 100644
--- a/arch/x86/kvm/mmu.c
+++ b/arch/x86/kvm/mmu.c
@@ -2595,8 +2595,7 @@
*gfnp = gfn;
kvm_release_pfn_clean(pfn);
pfn &= ~mask;
- if (!get_page_unless_zero(pfn_to_page(pfn)))
- BUG();
+ kvm_get_pfn(pfn);
*pfnp = pfn;
}
}