From: Hugh Dickins I think Andi missed the copy_vma I recently added for mremap, and it'll need something like below.... (Doesn't look like it'll optimize away when it's not needed - rather bloaty.) --- 25-akpm/mm/mmap.c | 7 +++++++ 1 files changed, 7 insertions(+) diff -puN mm/mmap.c~mpol-in-copy_vma mm/mmap.c --- 25/mm/mmap.c~mpol-in-copy_vma 2004-04-13 16:50:22.414391592 -0700 +++ 25-akpm/mm/mmap.c 2004-04-13 16:50:22.418390984 -0700 @@ -1502,6 +1502,7 @@ struct vm_area_struct *copy_vma(struct v struct mm_struct *mm = vma->vm_mm; struct vm_area_struct *new_vma, *prev; struct rb_node **rb_link, *rb_parent; + struct mempolicy *pol; find_vma_prepare(mm, addr, &prev, &rb_link, &rb_parent); new_vma = vma_merge(mm, prev, rb_parent, addr, addr + len, @@ -1510,6 +1511,12 @@ struct vm_area_struct *copy_vma(struct v new_vma = kmem_cache_alloc(vm_area_cachep, SLAB_KERNEL); if (new_vma) { *new_vma = *vma; + pol = mpol_copy(vma_policy(vma)); + if (IS_ERR(pol)) { + kmem_cache_free(vm_area_cachep, new_vma); + return NULL; + } + vma_set_policy(new_vma, pol); INIT_LIST_HEAD(&new_vma->shared); new_vma->vm_start = addr; new_vma->vm_end = addr + len; _