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 Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id E72C2C83F12 for ; Sun, 27 Aug 2023 13:30:47 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender: Content-Transfer-Encoding:Content-Type:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:MIME-Version:Message-Id:Date:Subject:Cc :To:From:Reply-To:Content-ID:Content-Description:Resent-Date:Resent-From: Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:In-Reply-To:References: List-Owner; bh=/l4V/jMUsPeojEfJAUPpKh4VTfmXfmVT0V0paOHfH3U=; b=HHJ6cjiV7Sdv8b F1kjqeco5wL0MhA5Iw+836c6pK+3jeVJVqmfwCXVun/gfS3o7HTtfZNBNn8DJdY+7098shB6sJUIp g0pNp3A2aHHSUMddrF0sv0nTBjlQoz2NH/1Xa4+qGsml/zYffYmbO5diYnU6SoJsIaFnIzRDGlyNt 2vxIn758v7ryRXHhjR4pT/vt+gec1MtVKN5srcdt4oWUoFJxwTWAHYPH0xHiUx865eqVB8NxnOtfH pgzuzTPsxIXExXol1mMcgViYGpPTlguCjq6aEHP05amBI+X5WmPXISYEOA5zcffZExCaoKxES7vZQ DqBVRz9yADtK5RJRgpsA==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.96 #2 (Red Hat Linux)) id 1qaFqV-0085Gz-1e; Sun, 27 Aug 2023 13:30:27 +0000 Received: from out-242.mta1.migadu.com ([2001:41d0:203:375::f2]) by bombadil.infradead.org with esmtps (Exim 4.96 #2 (Red Hat Linux)) id 1qaFqS-0085Fd-2P for linux-mtd@lists.infradead.org; Sun, 27 Aug 2023 13:30:26 +0000 X-Report-Abuse: Please report any abuse attempt to abuse@migadu.com and include these headers. DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linux.dev; s=key1; t=1693143008; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version: content-transfer-encoding:content-transfer-encoding; bh=hH9Z1s3VyDbNI+o0MhVSnq4vtAmGphAu/NP9Lh4Iqho=; b=D4glas+PskglEfull56Ie/EaUGDVyzdgOX1ZIuTOt4hIdaNgYSKi8HuTaE82KbnTe8VrVg RYQOGm2sDsmgjyTzfYWA88b8swvCAy1S+AvUnlRILYK1CLtNBRiYb+57DIqLl/tE9VNEa0 45zeea98vHJXfwWbVyE91LWfpk5toEg= From: Hao Xu To: io-uring@vger.kernel.org, Jens Axboe Cc: Dominique Martinet , Pavel Begunkov , Christian Brauner , Alexander Viro , Stefan Roesch , Clay Harris , Dave Chinner , "Darrick J . Wong" , linux-fsdevel@vger.kernel.org, linux-xfs@vger.kernel.org, linux-ext4@vger.kernel.org, linux-cachefs@redhat.com, ecryptfs@vger.kernel.org, linux-nfs@vger.kernel.org, linux-unionfs@vger.kernel.org, bpf@vger.kernel.org, netdev@vger.kernel.org, linux-s390@vger.kernel.org, linux-kernel@vger.kernel.org, linux-block@vger.kernel.org, linux-btrfs@vger.kernel.org, codalist@coda.cs.cmu.edu, linux-f2fs-devel@lists.sourceforge.net, cluster-devel@redhat.com, linux-mm@kvack.org, linux-nilfs@vger.kernel.org, devel@lists.orangefs.org, linux-cifs@vger.kernel.org, samba-technical@lists.samba.org, linux-mtd@lists.infradead.org, Wanpeng Li Subject: [PATCH v6 00/11] io_uring getdents Date: Sun, 27 Aug 2023 21:28:24 +0800 Message-Id: <20230827132835.1373581-1-hao.xu@linux.dev> MIME-Version: 1.0 X-Migadu-Flow: FLOW_OUT X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20230827_063024_950492_DDD1EC76 X-CRM114-Status: GOOD ( 16.31 ) X-BeenThere: linux-mtd@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: Linux MTD discussion mailing list List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-mtd" Errors-To: linux-mtd-bounces+linux-mtd=archiver.kernel.org@lists.infradead.org From: Hao Xu This series introduce getdents64 to io_uring, the code logic is similar with the snychronized version's. It first try nowait issue, and offload it to io-wq threads if the first try fails. Patch1 and Patch2 are some preparation Patch3 supports nowait for xfs getdents code Patch4-11 are vfs change, include adding helpers and trylock for locks Tests I've done: A liburing test case for functional test: https://github.com/HowHsu/liburing/commit/39dc9a8e19c06a8cebf8c2301b85320eb45c061e?diff=unified Tested it with a liburing performance test: https://github.com/HowHsu/liburing/blob/getdents/test/getdents2.c The test is controlled by the below script[2] which runs getdents2.t 100 times and calulate the avg. The result show that io_uring version is about 2.6% faster: note: [1] the number of getdents call/request in io_uring and normal sync version are made sure to be same beforehand. [2] run_getdents.py ```python3 import subprocess N = 100 sum = 0.0 args = ["/data/home/howeyxu/tmpdir", "sync"] for i in range(N): output = subprocess.check_output(["./liburing/test/getdents2.t"] + args) sum += float(output) average = sum / N print("Average of sync:", average) sum = 0.0 args = ["/data/home/howeyxu/tmpdir", "iouring"] for i in range(N): output = subprocess.check_output(["./liburing/test/getdents2.t"] + args) sum += float(output) average = sum / N print("Average of iouring:", average) ``` v5->v6: - remove xfs journal stuff since there are fundamental issues in the design. v4->v5: - move atime update to the beginning of getdents operation - trylock for i_rwsem - nowait semantics for involved xfs journal stuff v3->v4: - add Dave's xfs nowait code and fix a deadlock problem, with some code style tweak. - disable fixed file to avoid a race problem for now - add a test program. v2->v3: - removed the kernfs patches - add f_pos_lock logic - remove the "reduce last EOF getdents try" optimization since Dominique reports that doesn't make difference - remove the rewind logic, I think the right way is to introduce lseek to io_uring not to patch this logic to getdents. - add Singed-off-by of Stefan Roesch for patch 1 since checkpatch complained that Co-developed-by someone should be accompanied with Signed-off-by same person, I can remove them if Stefan thinks that's not proper. Dominique Martinet (1): fs: split off vfs_getdents function of getdents64 syscall Hao Xu (10): xfs: add NOWAIT semantics for readdir vfs: add nowait flag for struct dir_context vfs: add a vfs helper for io_uring file pos lock vfs: add file_pos_unlock() for io_uring usage vfs: add a nowait parameter for touch_atime() vfs: add nowait parameter for file_accessed() vfs: move file_accessed() to the beginning of iterate_dir() vfs: error out -EAGAIN if atime needs to be updated vfs: trylock inode->i_rwsem in iterate_dir() to support nowait io_uring: add support for getdents arch/s390/hypfs/inode.c | 2 +- block/fops.c | 2 +- fs/btrfs/file.c | 2 +- fs/btrfs/inode.c | 2 +- fs/cachefiles/namei.c | 2 +- fs/coda/dir.c | 4 +-- fs/ecryptfs/file.c | 4 +-- fs/ext2/file.c | 4 +-- fs/ext4/file.c | 6 ++-- fs/f2fs/file.c | 4 +-- fs/file.c | 13 ++++++++ fs/fuse/dax.c | 2 +- fs/fuse/file.c | 4 +-- fs/gfs2/file.c | 2 +- fs/hugetlbfs/inode.c | 2 +- fs/inode.c | 10 ++++-- fs/internal.h | 8 +++++ fs/namei.c | 4 +-- fs/nfsd/vfs.c | 2 +- fs/nilfs2/file.c | 2 +- fs/orangefs/file.c | 2 +- fs/orangefs/inode.c | 2 +- fs/overlayfs/file.c | 2 +- fs/overlayfs/inode.c | 2 +- fs/pipe.c | 2 +- fs/ramfs/file-nommu.c | 2 +- fs/readdir.c | 61 ++++++++++++++++++++++++++-------- fs/smb/client/cifsfs.c | 2 +- fs/splice.c | 2 +- fs/stat.c | 2 +- fs/ubifs/file.c | 2 +- fs/udf/file.c | 2 +- fs/xfs/libxfs/xfs_da_btree.c | 16 +++++++++ fs/xfs/libxfs/xfs_da_btree.h | 1 + fs/xfs/libxfs/xfs_dir2_block.c | 7 ++-- fs/xfs/libxfs/xfs_dir2_priv.h | 2 +- fs/xfs/scrub/dir.c | 2 +- fs/xfs/scrub/readdir.c | 2 +- fs/xfs/xfs_dir2_readdir.c | 49 +++++++++++++++++++++------ fs/xfs/xfs_file.c | 6 ++-- fs/xfs/xfs_inode.c | 27 +++++++++++++++ fs/xfs/xfs_inode.h | 17 ++++++---- fs/zonefs/file.c | 4 +-- include/linux/file.h | 7 ++++ include/linux/fs.h | 15 +++++++-- include/uapi/linux/io_uring.h | 1 + io_uring/fs.c | 53 +++++++++++++++++++++++++++++ io_uring/fs.h | 3 ++ io_uring/opdef.c | 8 +++++ kernel/bpf/inode.c | 4 +-- mm/filemap.c | 8 ++--- mm/shmem.c | 6 ++-- net/unix/af_unix.c | 4 +-- 53 files changed, 310 insertions(+), 96 deletions(-) -- 2.25.1 ______________________________________________________ Linux MTD discussion mailing list http://lists.infradead.org/mailman/listinfo/linux-mtd/