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    Subject[PATCH] 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>
    ---
    arch/x86/kvm/mmu.c | 3 +--
    1 files changed, 1 insertions(+), 2 deletions(-)

    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 @@ 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;
    }
    }
    --
    1.7.7.6


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