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=-11.8 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,MENTIONS_GIT_HOSTING, SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT autolearn=unavailable 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 1E0A5C74A35 for ; Thu, 11 Jul 2019 15:00:23 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id EEFAC21670 for ; Thu, 11 Jul 2019 15:00:22 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1729074AbfGKO6Y (ORCPT ); Thu, 11 Jul 2019 10:58:24 -0400 Received: from szxga04-in.huawei.com ([45.249.212.190]:2209 "EHLO huawei.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1728594AbfGKO6X (ORCPT ); Thu, 11 Jul 2019 10:58:23 -0400 Received: from DGGEMS409-HUB.china.huawei.com (unknown [172.30.72.58]) by Forcepoint Email with ESMTP id 2155F3980DF446C8B868; Thu, 11 Jul 2019 22:58:18 +0800 (CST) Received: from architecture4.huawei.com (10.140.130.215) by smtp.huawei.com (10.3.19.209) with Microsoft SMTP Server (TLS) id 14.3.439.0; Thu, 11 Jul 2019 22:58:10 +0800 From: Gao Xiang To: Alexander Viro , Greg Kroah-Hartman , Andrew Morton , Theodore Ts'o , Linus Torvalds CC: , , LKML , , Chao Yu , Miao Xie , Li Guifu , Fang Wei , Gao Xiang Subject: [PATCH v2 00/24] erofs: promote erofs from staging Date: Thu, 11 Jul 2019 22:57:31 +0800 Message-ID: <20190711145755.33908-1-gaoxiang25@huawei.com> X-Mailer: git-send-email 2.17.1 MIME-Version: 1.0 Content-Type: text/plain X-Originating-IP: [10.140.130.215] X-CFilter-Loop: Reflected Sender: linux-fsdevel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-fsdevel@vger.kernel.org Changelog from v1: o resend the whole filesystem into a patchset suggested by Greg; o code is more cleaner, especially for decompression frontend. --8<---------- Hi, EROFS file system has been in Linux-staging for about a year. It has been proved to be stable enough to move out of staging by 10+ millions of HUAWEI Android mobile phones on the market from EMUI 9.0.1, and it was promoted as one of the key features of EMUI 9.1 [1], including P30(pro). EROFS is a read-only file system designed to save extra storage space with guaranteed end-to-end performance by applying fixed-size output compression, inplace I/O and decompression inplace technologies [2] to Linux filesystem. In our observation, EROFS is one of the fastest Linux compression filesystem using buffered I/O in the world. It will support direct I/O in the future if needed. EROFS even has better read performance in a large CR range compared with generic uncompressed file systems with proper CPU-storage combination, which is a reason why EROFS can be landed to speed up mobile phone performance, and which can be probably used for other use cases such as LiveCD and Docker image as well. Currently EROFS supports 4k LZ4 fixed-size output compression since LZ4 is the fastest widely-used decompression solution in the world and 4k leads to unnoticable read amplification for the worst case. More compression algorithms and cluster sizes could be added later, which depends on the real requirement. More informations about EROFS itself are available at: Documentation/filesystems/erofs.txt https://kccncosschn19eng.sched.com/event/Nru2/erofs-an-introduction-and-our-smartphone-practice-xiang-gao-huawei erofs-utils (mainly mkfs.erofs now) is available at git://git.kernel.org/pub/scm/linux/kernel/git/xiang/erofs-utils.git Preliminary iomap support has been pending in EROFS mailing list by Chao Yu. The key issue is that current iomap doesn't support tail-end packing inline data yet, it should be resolved later. Thanks to many contributors in the last year, the code is more clean and improved. We hope EROFS can be used in wider use cases so let's promote erofs out of staging and enhance it more actively. Share comments about EROFS! We think EROFS is useful to community as a part of Linux upstream. Thank you very much, Gao Xiang [1] http://web.archive.org/web/20190627021241/https://consumer.huawei.com/en/emui/ [2] https://lore.kernel.org/lkml/20190624072258.28362-1-hsiangkao@aol.com/ Cc: Greg Kroah-Hartman Cc: Alexander Viro Cc: Andrew Morton Cc: Theodore Ts'o Cc: Chao Yu Cc: Miao Xie Cc: Li Guifu Cc: Fang Wei Signed-off-by: Gao Xiang Gao Xiang (24): erofs: add on-disk layout erofs: add erofs in-memory stuffs erofs: add super block operations erofs: add raw address_space operations erofs: add inode operations erofs: support special inode erofs: add directory operations erofs: add namei functions erofs: support tracepoint erofs: update Kconfig and Makefile erofs: introduce xattr & posixacl support erofs: introduce tagged pointer erofs: add compression indexes support erofs: introduce superblock registration erofs: introduce erofs shrinker erofs: introduce workstation for decompression erofs: introduce per-CPU buffers implementation erofs: introduce pagevec for decompression subsystem erofs: add erofs_allocpage() erofs: introduce generic decompression backend erofs: introduce LZ4 decompression inplace erofs: introduce the decompression frontend erofs: introduce cached decompression erofs: add document Documentation/filesystems/erofs.txt | 211 ++++ fs/Kconfig | 1 + fs/Makefile | 1 + fs/erofs/Kconfig | 154 +++ fs/erofs/Makefile | 11 + fs/erofs/compress.h | 89 ++ fs/erofs/data.c | 390 ++++++++ fs/erofs/decompressor.c | 329 ++++++ fs/erofs/dir.c | 147 +++ fs/erofs/erofs_fs.h | 317 ++++++ fs/erofs/inode.c | 326 ++++++ fs/erofs/internal.h | 566 +++++++++++ fs/erofs/namei.c | 250 +++++ fs/erofs/super.c | 616 ++++++++++++ fs/erofs/tagptr.h | 110 ++ fs/erofs/utils.c | 416 ++++++++ fs/erofs/xattr.c | 700 +++++++++++++ fs/erofs/xattr.h | 93 ++ fs/erofs/zdata.c | 1439 +++++++++++++++++++++++++++ fs/erofs/zdata.h | 201 ++++ fs/erofs/zmap.c | 462 +++++++++ fs/erofs/zpvec.h | 159 +++ include/trace/events/erofs.h | 256 +++++ 23 files changed, 7244 insertions(+) create mode 100644 Documentation/filesystems/erofs.txt create mode 100644 fs/erofs/Kconfig create mode 100644 fs/erofs/Makefile create mode 100644 fs/erofs/compress.h create mode 100644 fs/erofs/data.c create mode 100644 fs/erofs/decompressor.c create mode 100644 fs/erofs/dir.c create mode 100644 fs/erofs/erofs_fs.h create mode 100644 fs/erofs/inode.c create mode 100644 fs/erofs/internal.h create mode 100644 fs/erofs/namei.c create mode 100644 fs/erofs/super.c create mode 100644 fs/erofs/tagptr.h create mode 100644 fs/erofs/utils.c create mode 100644 fs/erofs/xattr.c create mode 100644 fs/erofs/xattr.h create mode 100644 fs/erofs/zdata.c create mode 100644 fs/erofs/zdata.h create mode 100644 fs/erofs/zmap.c create mode 100644 fs/erofs/zpvec.h create mode 100644 include/trace/events/erofs.h -- 2.17.1