change find_vma() to break ealier when found the adderss is not in any vma, don't need loop to search all vma. Signed-off-by: yalin wang <yalin.wang2010@xxxxxxxxx> --- mm/mmap.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/mm/mmap.c b/mm/mmap.c index b513f20..8294c9b 100644 --- a/mm/mmap.c +++ b/mm/mmap.c @@ -2064,6 +2064,9 @@ struct vm_area_struct *find_vma(struct mm_struct *mm, unsigned long addr) vma = tmp; if (tmp->vm_start <= addr) break; + if (!tmp->vm_prev || tmp->vm_prev->vm_end <= addr) + break; + rb_node = rb_node->rb_left; } else rb_node = rb_node->rb_right; -- 1.9.1 -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@xxxxxxxxx. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: <a href=mailto:"dont@xxxxxxxxx";> email@xxxxxxxxx </a>