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,URIBL_BLOCKED,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 05C53C433FF for ; Mon, 29 Jul 2019 05:43:46 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id D2F992070B for ; Mon, 29 Jul 2019 05:43:45 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=fb.com header.i=@fb.com header.b="A8b/82fs" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726693AbfG2Fno (ORCPT ); Mon, 29 Jul 2019 01:43:44 -0400 Received: from mx0b-00082601.pphosted.com ([67.231.153.30]:45498 "EHLO mx0a-00082601.pphosted.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1726164AbfG2Fno (ORCPT ); Mon, 29 Jul 2019 01:43:44 -0400 Received: from pps.filterd (m0001303.ppops.net [127.0.0.1]) by m0001303.ppops.net (8.16.0.27/8.16.0.27) with SMTP id x6T5g17b023383 for ; Sun, 28 Jul 2019 22:43:42 -0700 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=XvNEAXSYk797t3wYKn6N5VrcNz0WTBZX3qvsbOv7a4c=; b=A8b/82fs2baZD13oePcPAjzSlGKD56bvl+KGs1VwPWHL7UtnsAQ61RS5p268oY93FiUW EOzHr/W7yCC1z6nF3GH/3T7ehRQg6KYxPhR2wATX456Xxb9Y+hLFUm1VjondE85DW8HV usu3OQJH8my43Ci+btBCAcAkT6bkMn3Uvns= Received: from mail.thefacebook.com (mailout.thefacebook.com [199.201.64.23]) by m0001303.ppops.net with ESMTP id 2u1tf1022x-3 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-SHA384 bits=256 verify=NOT) for ; Sun, 28 Jul 2019 22:43:42 -0700 Received: from mx-out.facebook.com (2620:10d:c081:10::13) by mail.thefacebook.com (2620:10d:c081:35::125) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA) id 15.1.1713.5; Sun, 28 Jul 2019 22:43:41 -0700 Received: by devbig006.ftw2.facebook.com (Postfix, from userid 4523) id CA78A62E2BC0; Sun, 28 Jul 2019 22:43:38 -0700 (PDT) Smtp-Origin-Hostprefix: devbig From: Song Liu Smtp-Origin-Hostname: devbig006.ftw2.facebook.com To: , , CC: , , , , , , Song Liu Smtp-Origin-Cluster: ftw2c04 Subject: [PATCH 0/2] khugepaged: collapse pmd for pte-mapped THP Date: Sun, 28 Jul 2019 22:43:33 -0700 Message-ID: <20190729054335.3241150-1-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:,, definitions=2019-07-29_03:,, signatures=0 X-Proofpoint-Spam-Details: rule=fb_default_notspam policy=fb_default score=0 priorityscore=1501 malwarescore=0 suspectscore=0 phishscore=0 bulkscore=0 spamscore=0 clxscore=1015 lowpriorityscore=0 mlxscore=0 impostorscore=0 mlxlogscore=549 adultscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.0.1-1906280000 definitions=main-1907290068 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 is the newer version of 5/6 and 6/6 of [1]. v9 of 1-4 of the work [2] was recently picked by Andrew. Patch 1 enables khugepaged to handle pte-mapped THP. These THPs are left in such state when khugepaged failed to get exclusive lock of mmap_sem. Patch 2 leverages work in 1 for uprobe on THP. After [2], uprobe only splits the PMD. When the uprobe is disabled, we get pte-mapped THP. After this set, these pte-mapped THP will be collapsed as pmd-mapped. [1] https://lkml.org/lkml/2019/6/23/23 [2] https://www.spinics.net/lists/linux-mm/msg185889.html Song Liu (2): khugepaged: enable collapse pmd for pte-mapped THP uprobe: collapse THP pmd after removing all uprobes include/linux/khugepaged.h | 15 ++++ kernel/events/uprobes.c | 9 +++ mm/khugepaged.c | 136 +++++++++++++++++++++++++++++++++++++ 3 files changed, 160 insertions(+) -- 2.17.1