Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932346AbbLNLES (ORCPT ); Mon, 14 Dec 2015 06:04:18 -0500 Received: from mail-pf0-f176.google.com ([209.85.192.176]:34133 "EHLO mail-pf0-f176.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S932140AbbLNLEP (ORCPT ); Mon, 14 Dec 2015 06:04:15 -0500 From: yalin wang To: akpm@linux-foundation.org, kirill.shutemov@linux.intel.com, oleg@redhat.com, gang.chen.5i5j@gmail.com, mhocko@suse.com, kwapulinski.piotr@gmail.com, aarcange@redhat.com, dcashman@google.com, linux-mm@kvack.org, linux-kernel@vger.kernel.org Cc: yalin wang Subject: [RFC] mm: change find_vma() function Date: Mon, 14 Dec 2015 19:02:25 +0800 Message-Id: <1450090945-4020-1-git-send-email-yalin.wang2010@gmail.com> X-Mailer: git-send-email 1.9.1 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 873 Lines: 30 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 --- 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 from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/