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@xxxxxxxxxxxxxxxxxx> --- 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 -- To unsubscribe from this list: send the line "unsubscribe kvm" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
