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=-6.8 required=3.0 tests=BAYES_00, 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 32D41C2D0E1 for ; Tue, 15 Sep 2020 10:13:34 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id E3EE521D7D for ; Tue, 15 Sep 2020 10:13:33 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726381AbgIOKNc (ORCPT ); Tue, 15 Sep 2020 06:13:32 -0400 Received: from mail.cn.fujitsu.com ([183.91.158.132]:32367 "EHLO heian.cn.fujitsu.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1726169AbgIOKN2 (ORCPT ); Tue, 15 Sep 2020 06:13:28 -0400 X-IronPort-AV: E=Sophos;i="5.76,429,1592841600"; d="scan'208";a="99252004" Received: from unknown (HELO cn.fujitsu.com) ([10.167.33.5]) by heian.cn.fujitsu.com with ESMTP; 15 Sep 2020 18:13:19 +0800 Received: from G08CNEXMBPEKD04.g08.fujitsu.local (unknown [10.167.33.201]) by cn.fujitsu.com (Postfix) with ESMTP id 2B52448990DF; Tue, 15 Sep 2020 18:13:14 +0800 (CST) Received: from G08CNEXCHPEKD05.g08.fujitsu.local (10.167.33.203) by G08CNEXMBPEKD04.g08.fujitsu.local (10.167.33.201) with Microsoft SMTP Server (TLS) id 15.0.1497.2; Tue, 15 Sep 2020 18:13:12 +0800 Received: from localhost.localdomain (10.167.225.141) by G08CNEXCHPEKD05.g08.fujitsu.local (10.167.33.209) with Microsoft SMTP Server id 15.0.1497.2 via Frontend Transport; Tue, 15 Sep 2020 18:13:11 +0800 From: Shiyang Ruan To: , , , CC: , , , , , , , Subject: [RFC PATCH 0/4] fsdax: introduce fs query to support reflink Date: Tue, 15 Sep 2020 18:13:07 +0800 Message-ID: <20200915101311.144269-1-ruansy.fnst@cn.fujitsu.com> X-Mailer: git-send-email 2.28.0 MIME-Version: 1.0 Content-Transfer-Encoding: 7BIT Content-Type: text/plain; charset=US-ASCII X-yoursite-MailScanner-ID: 2B52448990DF.AB1A2 X-yoursite-MailScanner: Found to be clean X-yoursite-MailScanner-From: ruansy.fnst@cn.fujitsu.com Sender: linux-fsdevel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-fsdevel@vger.kernel.org This patchset is a try to resolve the problem of tracking shared page for fsdax. This patchset moves owner tracking from dax_assocaite_entry() to pmem device, by introducing an interface ->memory_failure() of struct pagemap. The interface is called by memory_failure() in mm, and implemented by pmem device. Then pmem device find the filesystem which the damaged page located in, and call ->storage_lost() to track files or metadata assocaited with this page. Finally we are able to try to fix the damaged data in filesystem and do other necessary processing, such as killing processes who are using the files affected. The call trace is like this: memory_failure() pgmap->ops->memory_failure() => pmem_pgmap_memory_failure() bdev->bd_super->storage_lost() => xfs_fs_storage_lost() xfs_rmap_query_range() xfs_storage_lost_helper() mf_recover_controller->recover_fn => \ memory_failure_dev_pagemap_kill_procs() The collect_procs() and kill_procs() are moved into a callback which is passed from memory_failure() to xfs_storage_lost_helper(). So we can call it when a file assocaited is found, instead of creating a file list and iterate it. The fsdax & reflink support for XFS is not contained in this patchset. (Rebased on v5.9-rc2) == Shiyang Ruan (4): fs: introduce ->storage_lost() for memory-failure pagemap: introduce ->memory_failure() mm, fsdax: refactor dax handler in memory-failure fsdax: remove useless (dis)associate functions block/genhd.c | 12 ++++ drivers/nvdimm/pmem.c | 31 ++++++++++ fs/dax.c | 64 ++------------------ fs/xfs/xfs_super.c | 80 ++++++++++++++++++++++++ include/linux/dax.h | 5 +- include/linux/fs.h | 1 + include/linux/genhd.h | 2 + include/linux/memremap.h | 3 + include/linux/mm.h | 14 +++++ mm/memory-failure.c | 127 ++++++++++++++++++++++++--------------- 10 files changed, 229 insertions(+), 110 deletions(-) -- 2.28.0