From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-pa0-f48.google.com (mail-pa0-f48.google.com [209.85.220.48]) by kanga.kvack.org (Postfix) with ESMTP id 0B61F6B0254 for ; Mon, 14 Dec 2015 06:04:16 -0500 (EST) Received: by pacwq6 with SMTP id wq6so102150613pac.1 for ; Mon, 14 Dec 2015 03:04:15 -0800 (PST) Received: from mail-pf0-x234.google.com (mail-pf0-x234.google.com. [2607:f8b0:400e:c00::234]) by mx.google.com with ESMTPS id p7si2019072pfi.26.2015.12.14.03.04.15 for (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Mon, 14 Dec 2015 03:04:15 -0800 (PST) Received: by pfnn128 with SMTP id n128so104043600pfn.0 for ; Mon, 14 Dec 2015 03:04:15 -0800 (PST) From: 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> Sender: owner-linux-mm@kvack.org List-ID: 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 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, send a message with 'unsubscribe linux-mm' in the body to majordomo@kvack.org. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: email@kvack.org