From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-pf0-f199.google.com (mail-pf0-f199.google.com [209.85.192.199]) by kanga.kvack.org (Postfix) with ESMTP id 3B983828DF for ; Fri, 15 Apr 2016 20:24:34 -0400 (EDT) Received: by mail-pf0-f199.google.com with SMTP id c20so214790534pfc.2 for ; Fri, 15 Apr 2016 17:24:34 -0700 (PDT) Received: from mga14.intel.com (mga14.intel.com. [192.55.52.115]) by mx.google.com with ESMTP id x64si5196980pfi.208.2016.04.15.17.24.19 for ; Fri, 15 Apr 2016 17:24:19 -0700 (PDT) From: "Kirill A. Shutemov" Subject: [PATCHv7 16/29] vmscan: split file huge pages before paging them out Date: Sat, 16 Apr 2016 03:23:47 +0300 Message-Id: <1460766240-84565-17-git-send-email-kirill.shutemov@linux.intel.com> In-Reply-To: <1460766240-84565-1-git-send-email-kirill.shutemov@linux.intel.com> References: <1460766240-84565-1-git-send-email-kirill.shutemov@linux.intel.com> Sender: owner-linux-mm@kvack.org List-ID: To: Hugh Dickins , Andrea Arcangeli , Andrew Morton Cc: Dave Hansen , Vlastimil Babka , Christoph Lameter , Naoya Horiguchi , Jerome Marchand , Yang Shi , Sasha Levin , Andres Lagar-Cavilla , Ning Qu , linux-kernel@vger.kernel.org, linux-mm@kvack.org, linux-fsdevel@vger.kernel.org, "Kirill A. Shutemov" This is preparation of vmscan for file huge pages. We cannot write out huge pages, so we need to split them on the way out. Signed-off-by: Kirill A. Shutemov --- mm/vmscan.c | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/mm/vmscan.c b/mm/vmscan.c index e9fe17c96ef8..df56f6a2dbfe 100644 --- a/mm/vmscan.c +++ b/mm/vmscan.c @@ -1055,8 +1055,14 @@ static unsigned long shrink_page_list(struct list_head *page_list, /* Adding to swap updated mapping */ mapping = page_mapping(page); + } else if (unlikely(PageTransHuge(page))) { + /* Split file THP */ + if (split_huge_page_to_list(page, page_list)) + goto keep_locked; } + VM_BUG_ON_PAGE(PageTransHuge(page), page); + /* * The page is mapped into the page tables of one or more * processes. Try to unmap it here. -- 2.8.0.rc3 -- 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