mm: change anon_vma linking to fix multi-process server scalability issue

[pandora-kernel.git] / mm / mremap.c

diff --git a/mm/mremap.c b/mm/mremap.c
index 4c4c803..e9c75ef 100644 (file)
--- a/mm/mremap.c
+++ b/mm/mremap.c
@@ -460,8 +460,11 @@ unsigned long do_mremap(unsigned long addr,
                if (vma_expandable(vma, new_len - old_len)) {
                        int pages = (new_len - old_len) >> PAGE_SHIFT;
 
-                       vma_adjust(vma, vma->vm_start,
-                               addr + new_len, vma->vm_pgoff, NULL);
+                       if (vma_adjust(vma, vma->vm_start, addr + new_len,
+                                      vma->vm_pgoff, NULL)) {
+                               ret = -ENOMEM;
+                               goto out;
+                       }
 
                        mm->total_vm += pages;
                        vm_stat_account(mm, vma->vm_flags, vma->vm_file, pages);