From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-pa0-f71.google.com (mail-pa0-f71.google.com [209.85.220.71]) by kanga.kvack.org (Postfix) with ESMTP id 4E62C6B0005 for ; Wed, 10 Aug 2016 04:02:15 -0400 (EDT) Received: by mail-pa0-f71.google.com with SMTP id ez1so62763312pab.1 for ; Wed, 10 Aug 2016 01:02:15 -0700 (PDT) Received: from out4435.biz.mail.alibaba.com (out4435.biz.mail.alibaba.com. [47.88.44.35]) by mx.google.com with ESMTP id p11si47351423pao.78.2016.08.10.01.02.13 for ; Wed, 10 Aug 2016 01:02:14 -0700 (PDT) Reply-To: "Hillf Danton" From: "Hillf Danton" References: <01f101d1f2da$5e943aa0$1bbcafe0$@alibaba-inc.com> <01f201d1f2dc$bd43f750$37cbe5f0$@alibaba-inc.com> In-Reply-To: <01f201d1f2dc$bd43f750$37cbe5f0$@alibaba-inc.com> Subject: Re: [RFC 11/11] mm, THP, swap: Delay splitting THP during swap out Date: Wed, 10 Aug 2016 16:01:59 +0800 Message-ID: <01f301d1f2dd$78df7660$6a9e6320$@alibaba-inc.com> MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Content-Language: zh-cn Sender: owner-linux-mm@kvack.org List-ID: To: 'Huang Ying' Cc: linux-mm@kvack.org > > @@ -187,6 +221,14 @@ int add_to_swap(struct page *page, struct list_head *list) > VM_BUG_ON_PAGE(!PageLocked(page), page); > VM_BUG_ON_PAGE(!PageUptodate(page), page); > > + if (unlikely(PageTransHuge(page))) { > + err = add_to_swap_trans_huge(page, list); > + if (err < 0) > + return 0; > + else if (err > 0) > + return err; > + /* fallback to split firstly if return 0 */ switch (err) and add vm event count according to the meaning of err? > + } thanks Hillf -- 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