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KVM: MMU: fix huge page adapted on non-PAE host

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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>
This commit is contained in:
Xiao Guangrong 2012-05-28 14:10:43 +08:00 committed by Avi Kivity
parent b48b2c3e50
commit c358666783
1 changed files with 1 additions and 2 deletions
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3
arch/x86/kvm/mmu.c
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@ -2595,8 +2595,7 @@ static void transparent_hugepage_adjust(struct kvm_vcpu *vcpu,
*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;
}
}