[RFC PATCH 6/6] powerpc/kvm: change the condition of identifying hugetlb vm

Wenwei Tao
2015-06-10T06:33:13Z

Hugetlb VMAs are not mergeable, that means a VMA couldn't have VM_HUGETLB and
VM_MERGEABLE been set in the same time. So we use VM_HUGETLB to indicate new
mergeable VMAs. Because of that a VMA which has VM_HUGETLB been set is a hugetlb
VMA only if it doesn't have VM_MERGEABLE been set in the same time.

Signed-off-by: Wenwei Tao <wenweitaowenwei@gmail.com>
---
arch/powerpc/kvm/e500_mmu_host.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/arch/powerpc/kvm/e500_mmu_host.c b/arch/powerpc/kvm/e500_mmu_host.c
index cc536d4..d76f518 100644
--- a/arch/powerpc/kvm/e500_mmu_host.c
+++ b/arch/powerpc/kvm/e500_mmu_host.c
@@ -423,7 +423,8 @@ static inline int kvmppc_e500_shadow_map(struct kvmppc_vcpu_e500 *vcpu_e500,
break;
}
} else if (vma && hva >= vma->vm_start &&
- (vma->vm_flags & VM_HUGETLB)) {
+ ((vma->vm_flags & (VM_HUGETLB | VM_MERGEABLE)) ==
+ VM_HUGETLB)) {
unsigned long psize = vma_kernel_pagesize(vma);

tsize = (gtlbe->mas1 & MAS1_TSIZE_MASK) >>
--
1.7.9.5