From: Hugh Dickins <hugh@veritas.com>
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;
_