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-rw-r--r--mm/mempolicy.c21
1 files changed, 19 insertions, 2 deletions
diff --git a/mm/mempolicy.c b/mm/mempolicy.c
index c1592a94582f..83c69f8a64c2 100644
--- a/mm/mempolicy.c
+++ b/mm/mempolicy.c
@@ -722,12 +722,29 @@ out:
}
+/*
+ * Allocate a new page for page migration based on vma policy.
+ * Start assuming that page is mapped by vma pointed to by @private.
+ * Search forward from there, if not. N.B., this assumes that the
+ * list of pages handed to migrate_pages()--which is how we get here--
+ * is in virtual address order.
+ */
static struct page *new_vma_page(struct page *page, unsigned long private, int **x)
{
struct vm_area_struct *vma = (struct vm_area_struct *)private;
+ unsigned long uninitialized_var(address);
- return alloc_page_vma(GFP_HIGHUSER_MOVABLE, vma,
- page_address_in_vma(page, vma));
+ while (vma) {
+ address = page_address_in_vma(page, vma);
+ if (address != -EFAULT)
+ break;
+ vma = vma->vm_next;
+ }
+
+ /*
+ * if !vma, alloc_page_vma() will use task or system default policy
+ */
+ return alloc_page_vma(GFP_HIGHUSER_MOVABLE, vma, address);
}
#else