From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-3.9 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI, SPF_HELO_NONE,SPF_PASS,USER_AGENT_GIT autolearn=no autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id A8805C5DF62 for ; Wed, 6 Nov 2019 06:10:16 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 67189214D8 for ; Wed, 6 Nov 2019 06:10:16 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=fb.com header.i=@fb.com header.b="Id1K7J29" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1729872AbfKFGKP (ORCPT ); Wed, 6 Nov 2019 01:10:15 -0500 Received: from mx0a-00082601.pphosted.com ([67.231.145.42]:27880 "EHLO mx0a-00082601.pphosted.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1725806AbfKFGKP (ORCPT ); Wed, 6 Nov 2019 01:10:15 -0500 Received: from pps.filterd (m0044010.ppops.net [127.0.0.1]) by mx0a-00082601.pphosted.com (8.16.0.42/8.16.0.42) with SMTP id xA66ACib028981 for ; Tue, 5 Nov 2019 22:10:14 -0800 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=fb.com; h=from : to : cc : subject : date : message-id : mime-version : content-type; s=facebook; bh=iBiMo+12y6HLPZMvxe/0Ndb0dqSCd+cXriHq+6VsBx8=; b=Id1K7J29/MVtCajtXkD61JsiLizYsvBj7UnMnJ6WvGRiYX8CrlEQeYdekTk0ax72kLCt eCCZ6QX4jpI1AF2wUo1UIPrDtIP9KWkRjb7uQ3EuuYvr+RBxFIhA5gbg4aIP6nlu5M9k jLpwdLiMSMXfxGlSxgNDLTw9LIUsERFL4sI= Received: from maileast.thefacebook.com ([163.114.130.16]) by mx0a-00082601.pphosted.com with ESMTP id 2w3em1txkw-3 (version=TLSv1.2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128 verify=NOT) for ; Tue, 05 Nov 2019 22:10:14 -0800 Received: from 2401:db00:30:6012:face:0:17:0 (2620:10d:c0a8:1b::d) by mail.thefacebook.com (2620:10d:c0a8:83::6) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.1713.5; Tue, 5 Nov 2019 22:09:50 -0800 Received: by devbig006.ftw2.facebook.com (Postfix, from userid 4523) id E6D5262E36EB; Tue, 5 Nov 2019 22:09:48 -0800 (PST) Smtp-Origin-Hostprefix: devbig From: Song Liu Smtp-Origin-Hostname: devbig006.ftw2.facebook.com To: , , CC: , , , , Song Liu Smtp-Origin-Cluster: ftw2c04 Subject: [PATCH v5 0/2] fix and improvement for file THP Date: Tue, 5 Nov 2019 22:09:28 -0800 Message-ID: <20191106060930.2571389-1-songliubraving@fb.com> X-Mailer: git-send-email 2.17.1 X-FB-Internal: Safe MIME-Version: 1.0 Content-Type: text/plain X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:6.0.95,18.0.572 definitions=2019-11-06_01:2019-11-05,2019-11-06 signatures=0 X-Proofpoint-Spam-Details: rule=fb_default_notspam policy=fb_default score=0 mlxscore=0 impostorscore=0 suspectscore=0 lowpriorityscore=0 malwarescore=0 adultscore=0 mlxlogscore=469 phishscore=0 clxscore=1015 bulkscore=0 spamscore=0 priorityscore=1501 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-1908290000 definitions=main-1911060064 X-FB-Internal: deliver Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org This set includes a fix and an improvement for file THP. 1/2 fixes pagecache corruption for file THP, where !PageUptodate page gets collapsed into huge page. 1/2 is needed for 5.4. 2/2 improve collapse of file THP by flushing dirty page in collapse_file(). 2/2 can wait until 5.5. Thanks, Song Song Liu (2): mm,thp: recheck each page before collapsing file THP mm/thp: flush file for !is_shmem PageDirty() case in collapse_file() mm/khugepaged.c | 42 ++++++++++++++++++++++++++++++++---------- 1 file changed, 32 insertions(+), 10 deletions(-) -- 2.17.1