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=-3.0 required=3.0 tests=BAYES_50, 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 96D84C43461 for ; Tue, 15 Sep 2020 10:13:26 +0000 (UTC) Received: from ml01.01.org (ml01.01.org [198.145.21.10]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 4AAB4206E6 for ; Tue, 15 Sep 2020 10:13:26 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 4AAB4206E6 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=cn.fujitsu.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-nvdimm-bounces@lists.01.org Received: from ml01.vlan13.01.org (localhost [IPv6:::1]) by ml01.01.org (Postfix) with ESMTP id 012C814C1D6C1; Tue, 15 Sep 2020 03:13:26 -0700 (PDT) Received-SPF: None (mailfrom) identity=mailfrom; client-ip=183.91.158.132; helo=heian.cn.fujitsu.com; envelope-from=ruansy.fnst@cn.fujitsu.com; receiver= Received: from heian.cn.fujitsu.com (mail.cn.fujitsu.com [183.91.158.132]) by ml01.01.org (Postfix) with ESMTP id 415981412ED97 for ; Tue, 15 Sep 2020 03:13:22 -0700 (PDT) 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: , , , 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 X-yoursite-MailScanner-ID: 2B52448990DF.AB1A2 X-yoursite-MailScanner: Found to be clean X-yoursite-MailScanner-From: ruansy.fnst@cn.fujitsu.com Message-ID-Hash: XPZTCYNJYQV4TSXMOVD43GJA3FD54KS3 X-Message-ID-Hash: XPZTCYNJYQV4TSXMOVD43GJA3FD54KS3 X-MailFrom: ruansy.fnst@cn.fujitsu.com X-Mailman-Rule-Misses: dmarc-mitigation; no-senders; approved; emergency; loop; banned-address; member-moderation; nonmember-moderation; administrivia; implicit-dest; max-recipients; max-size; news-moderation; no-subject; suspicious-header CC: linux-fsdevel@vger.kernel.org, darrick.wong@oracle.com, david@fromorbit.com, hch@lst.de, rgoldwyn@suse.de, qi.fuli@fujitsu.com, y-goto@fujitsu.com X-Mailman-Version: 3.1.1 Precedence: list List-Id: "Linux-nvdimm developer list." Archived-At: List-Archive: List-Help: List-Post: List-Subscribe: List-Unsubscribe: Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit 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 _______________________________________________ Linux-nvdimm mailing list -- linux-nvdimm@lists.01.org To unsubscribe send an email to linux-nvdimm-leave@lists.01.org