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 kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by smtp.lore.kernel.org (Postfix) with ESMTP id 8EB07C04E69 for ; Wed, 9 Aug 2023 07:10:16 +0000 (UTC) Received: by kanga.kvack.org (Postfix) id 2971B6B007B; Wed, 9 Aug 2023 03:10:16 -0400 (EDT) Received: by kanga.kvack.org (Postfix, from userid 40) id 247DF6B007D; Wed, 9 Aug 2023 03:10:16 -0400 (EDT) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 0C1DE8D0001; Wed, 9 Aug 2023 03:10:16 -0400 (EDT) X-Delivered-To: linux-mm@kvack.org Received: from relay.hostedemail.com (smtprelay0012.hostedemail.com [216.40.44.12]) by kanga.kvack.org (Postfix) with ESMTP id F0E906B007B for ; Wed, 9 Aug 2023 03:10:15 -0400 (EDT) Received: from smtpin26.hostedemail.com (a10.router.float.18 [10.200.18.1]) by unirelay05.hostedemail.com (Postfix) with ESMTP id C0A624095E for ; Wed, 9 Aug 2023 07:10:15 +0000 (UTC) X-FDA: 81103692390.26.CAD23EE Received: from dfw.source.kernel.org (dfw.source.kernel.org [139.178.84.217]) by imf13.hostedemail.com (Postfix) with ESMTP id ECA3C2000F for ; Wed, 9 Aug 2023 07:10:13 +0000 (UTC) Authentication-Results: imf13.hostedemail.com; dkim=pass header.d=kernel.org header.s=k20201202 header.b=ggBjfw6P; dmarc=pass (policy=none) header.from=kernel.org; spf=pass (imf13.hostedemail.com: domain of brauner@kernel.org designates 139.178.84.217 as permitted sender) smtp.mailfrom=brauner@kernel.org ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=hostedemail.com; s=arc-20220608; t=1691565014; h=from:from:sender:reply-to:subject:subject:date:date: message-id:message-id:to:to:cc:cc:mime-version:mime-version: content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references:dkim-signature; bh=+6I/QTNBngyTccgKcXVt1JYNO+FdIjYjioVaMKNNcUU=; b=XGwCj9KzQ6GobINAh9oIVt4uFWABevd3tWqSXRbNPuvaoybqUAQmO9p5btoL+414TAMPlH FHprqZgfJZ+13L7QbIYdFu19BaVg5ULCXo+Y6OigApOtb0iC8wKDuACUo3VBLjba8ogYls mxV/gaJMQ0UJTf7R9rp/Z9bIkyGnFhE= ARC-Authentication-Results: i=1; imf13.hostedemail.com; dkim=pass header.d=kernel.org header.s=k20201202 header.b=ggBjfw6P; dmarc=pass (policy=none) header.from=kernel.org; spf=pass (imf13.hostedemail.com: domain of brauner@kernel.org designates 139.178.84.217 as permitted sender) smtp.mailfrom=brauner@kernel.org ARC-Seal: i=1; s=arc-20220608; d=hostedemail.com; t=1691565014; a=rsa-sha256; cv=none; b=WRE2Q6N3TvnNgvaUFYggTSrEOqoB2lbuG1o2FliULOX/erv1Vc+FkuegMRCkk/xxsIQfsB W4vqCZm76vR0nxurJeksZoDmg4IqvuI2/ZWCMABLFiRTF7rAaliRNfjw2UWb4umtlP50Dh oPk8VEfOakBtz2eh1Zf0oY7W8xqoSlQ= Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits)) (No client certificate requested) by dfw.source.kernel.org (Postfix) with ESMTPS id 14B3762FBF; Wed, 9 Aug 2023 07:10:13 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 803F7C433C7; Wed, 9 Aug 2023 07:09:57 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1691565012; bh=+3Y6neJgMvW5vfedbEeRcP7JJepyGcWsyiFSr/HW990=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=ggBjfw6PiXZGX2pQ0PAP5cLTD5E0rfqWCYvfni6XgMaAu/qe1HDhVULCR34YpT5YS BKgPskzZUrQN/q0pADH7E3rJp+efq+TJqLpTcE7dWusL6zUTz83z7W2kEcL4C6I9Pl ufDj5BPqocIYlc8GG9bv5prUaOSZXY+wJG0igl2mx/MjAwyCvyPRsvUpSYuoG9hC3v Cpu7fhDWB2xklEWatdaUMtlv7AEsl0+OXnaMFZ2BdukJjZL1AZSUnY8BUua+nFhXag gAEez8RHLWI4JAU/88U4SJjdJFFBI98gXxi6sXBvp3qvswqNnsMmS0Eecbc3TwTHzz J9jzLmchFW2kQ== From: Christian Brauner To: Jeff Layton Cc: Christian Brauner , linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org, v9fs@lists.linux.dev, linux-afs@lists.infradead.org, linux-btrfs@vger.kernel.org, ceph-devel@vger.kernel.org, codalist@coda.cs.cmu.edu, ecryptfs@vger.kernel.org, linux-erofs@lists.ozlabs.org, linux-ext4@vger.kernel.org, linux-f2fs-devel@lists.sourceforge.net, cluster-devel@redhat.com, linux-nfs@vger.kernel.org, ntfs3@lists.linux.dev, ocfs2-devel@lists.linux.dev, devel@lists.orangefs.org, linux-cifs@vger.kernel.org, samba-technical@lists.samba.org, linux-mtd@lists.infradead.org, linux-mm@kvack.org, linux-unionfs@vger.kernel.org, linux-xfs@vger.kernel.org, Jan Kara , Alexander Viro , Eric Van Hensbergen , Latchesar Ionkov , Dominique Martinet , Christian Schoenebeck , David Howells , Marc Dionne , Chris Mason , Josef Bacik , David Sterba , Xiubo Li , Ilya Dryomov , Jan Harkes , coda@cs.cmu.edu, Tyler Hicks , Gao Xiang , Chao Yu , Yue Hu , Jeffle Xu , Namjae Jeon , Sungjong Seo , Jan Kara , Theodore Ts'o , Andreas Dilger , Jaegeuk Kim , OGAWA Hirofumi , Miklos Szeredi , Bob Peterson , Andreas Gruenbacher , Greg Kroah-Hartman , Tejun Heo , Trond Myklebust , Anna Schumaker , Konstantin Komarov , Mark Fasheh , Joel Becker , Joseph Qi , Mike Marshall , Martin Brandenburg , Luis Chamberlain , Kees Cook , Iurii Zaikin , Steve French , Paulo Alcantara , Ronnie Sahlberg , Shyam Prasad N , Tom Talpey , Sergey Senozhatsky , Richard Weinberger , Hans de Goede , Hugh Dickins , Andrew Morton , Amir Goldstein , "Darrick J. Wong" , Benjamin Coddington Subject: Re: [PATCH v7 00/13] fs: implement multigrain timestamps Date: Wed, 9 Aug 2023 09:09:49 +0200 Message-Id: <20230809-neuigkeit-lahmgelegt-ec0ab744a2be@brauner> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20230807-mgctime-v7-0-d1dec143a704@kernel.org> References: <20230807-mgctime-v7-0-d1dec143a704@kernel.org> MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" X-Developer-Signature: v=1; a=openpgp-sha256; l=2693; i=brauner@kernel.org; h=from:subject:message-id; bh=+3Y6neJgMvW5vfedbEeRcP7JJepyGcWsyiFSr/HW990=; b=owGbwMvMwCU28Zj0gdSKO4sYT6slMaRctt58ofGmdrjT46zKic8e+j/qO6J62PGCzlmNRn/PL+ca DhW87ChlYRDjYpAVU2RxaDcJl1vOU7HZKFMDZg4rE8gQBi5OAZiIjiMjw77ybes4w5Z37p3j9lpveq 1v7yzNZOVwx1cX83f9exixeQ8jw5qJVSkpYSKnLt8M6dl09qHqq/xjLU9j3pdUzg+b1x8izQ4A X-Developer-Key: i=brauner@kernel.org; a=openpgp; fpr=4880B8C9BD0E5106FC070F4F7B3C391EFEA93624 Content-Transfer-Encoding: 8bit X-Rspamd-Queue-Id: ECA3C2000F X-Rspam-User: X-Rspamd-Server: rspam02 X-Stat-Signature: 9dj3nseu45pkujsi1zrhp8gwfnkze339 X-HE-Tag: 1691565013-129019 X-HE-Meta: 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 4Z36lyrM UgBwCfRj8P40RjqNzanrd5PTyYN4ISpcEdzk6nAwbvAYMffKD6jlidB9dkVq3okh6GIDGz5qgF7nvU0kKjxbm8baCOG/OwbFSfV/OGV0QyTuqh8z6e2/tck3g3XBsv0D/HwFqoATRUUPxroFMoNxOp4ktOtAeIZ7hWhfsw2idPi7A9K7WVuBtndIxYG4V23+NRnKeZe9lOnrBhDTycIKo0/reXDwfHCFf6WiGvDzMaRZoK6XUEoKbPg9lbo+bsHIhhMXnRgS+8wIHwKOBP5nE66LNiKVctOZRgJi1anheF7h8XSGXt0MmBffR9o4VHX4vaVi1eIsymulJuOZjVDpQ5M3d1A== X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: On Mon, 07 Aug 2023 15:38:31 -0400, Jeff Layton wrote: > The VFS always uses coarse-grained timestamps when updating the > ctime and mtime after a change. This has the benefit of allowing > filesystems to optimize away a lot metadata updates, down to around 1 > per jiffy, even when a file is under heavy writes. > > Unfortunately, this coarseness has always been an issue when we're > exporting via NFSv3, which relies on timestamps to validate caches. A > lot of changes can happen in a jiffy, so timestamps aren't sufficient to > help the client decide to invalidate the cache. > > [...] Applied to the vfs.ctime branch of the vfs/vfs.git tree. Patches in the vfs.ctime branch should appear in linux-next soon. Please report any outstanding bugs that were missed during review in a new review to the original patch series allowing us to drop it. It's encouraged to provide Acked-bys and Reviewed-bys even though the patch has now been applied. If possible patch trailers will be updated. Note that commit hashes shown below are subject to change due to rebase, trailer updates or similar. If in doubt, please check the listed branch. tree: https://git.kernel.org/pub/scm/linux/kernel/git/vfs/vfs.git branch: vfs.ctime [01/13] fs: remove silly warning from current_time https://git.kernel.org/vfs/vfs/c/562bcab11bf4 [02/13] fs: pass the request_mask to generic_fillattr https://git.kernel.org/vfs/vfs/c/3592165f4378 [03/13] fs: drop the timespec64 arg from generic_update_time https://git.kernel.org/vfs/vfs/c/32586bb50943 [04/13] btrfs: have it use inode_update_timestamps https://git.kernel.org/vfs/vfs/c/51fc38e7c7d1 [05/13] fat: make fat_update_time get its own timestamp https://git.kernel.org/vfs/vfs/c/d6e7faae82dc [06/13] ubifs: have ubifs_update_time use inode_update_timestamps https://git.kernel.org/vfs/vfs/c/853ff59b434a [07/13] xfs: have xfs_vn_update_time gets its own timestamp https://git.kernel.org/vfs/vfs/c/7ad056c2cf36 [08/13] fs: drop the timespec64 argument from update_time https://git.kernel.org/vfs/vfs/c/3beae086b71f [09/13] fs: add infrastructure for multigrain timestamps https://git.kernel.org/vfs/vfs/c/b16956ed812f [10/13] tmpfs: add support for multigrain timestamps https://git.kernel.org/vfs/vfs/c/bd21ec574f16 [11/13] xfs: switch to multigrain timestamps https://git.kernel.org/vfs/vfs/c/fb9812d2c39e [12/13] ext4: switch to multigrain timestamps https://git.kernel.org/vfs/vfs/c/7fdf02299f5d [13/13] btrfs: convert to multigrain timestamps https://git.kernel.org/vfs/vfs/c/2ebbf04988b9