From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 6590D330B19; Fri, 6 Feb 2026 16:51:28 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1770396688; cv=none; b=XX/12PxVVqfqPQlyqSM6GZjrqunHnx5538Owyhw2Xk+cnqbJRSkw4X4cPEw+AoQzUAMRfMpC0nER00Z6fJkFjJyedr9cQapwCLyUR4I2X+nWEA5L0VIeuawGxEnsR2da/ZPzx3fckZkSGYf9yX8yt1+q6ZM0OblU2XIU5DSVyD4= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1770396688; c=relaxed/simple; bh=1LRXDt7RI+IMWSeoD5YYO/2KRUciC6Usl7JV6pWjFfo=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=lZ/JvISOAIfbJ5YGIexszn7WMCgaZzIDUl5QpVOdudTPcr/skjkvtEglTXbSa8XaxZhWG2REYLtFfchDrMEu/94weJ7aUDvkbDzN+Z0qBhZsXCZj+P5l9Yatq7cGqtYxiKF/CwqYL62Hy2E8Q9eOXAvSWTTON/xQ/7XH48ZPQJ8= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=DbFahG8y; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="DbFahG8y" Received: by smtp.kernel.org (Postfix) with ESMTPSA id E077FC19423; Fri, 6 Feb 2026 16:51:26 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1770396688; bh=1LRXDt7RI+IMWSeoD5YYO/2KRUciC6Usl7JV6pWjFfo=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=DbFahG8yZjsxVO0I0HYVnHd9ccKVMJ4bty0Fl5gtw4nJ/EiOSa4yq7N2qw018MHD4 TXwBLVrW4FHd5m04IDxmk1Xzt4QiY2ZrSWn3405PrmWv28WeLT/PeiKZiLOfo0oyH2 MyYaCA24qeVvWsWerJsCeSO5GRoy48zxU6k2FtW72M+nV+ea4rEyb2jsyyHu5h4R7b EqiUNPWisItNr6H2pOjj1bQet/S9hDzqbpPVmqPI/yYmVys1maiA2yNOHWmTgRuup1 OyC6s2nw2L/+XqkcxrLsouTaOsDHD2kYUn0qBz4DGwF/J4kZz2Z1wJygOpF6V9gw+7 wn+uiDBjATY5A== From: Christian Brauner To: Linus Torvalds Cc: Christian Brauner , linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [GIT PULL 03/12 for v7.0] vfs nonblocking_timestamps Date: Fri, 6 Feb 2026 17:49:59 +0100 Message-ID: <20260206-vfs-nonblocking_timestamps-v70-59f22fca9b3a@brauner> X-Mailer: git-send-email 2.47.3 In-Reply-To: <20260206-vfs-v70-7df0b750d594@brauner> References: <20260206-vfs-v70-7df0b750d594@brauner> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Developer-Signature: v=1; a=openpgp-sha256; l=4119; i=brauner@kernel.org; h=from:subject:message-id; bh=1LRXDt7RI+IMWSeoD5YYO/2KRUciC6Usl7JV6pWjFfo=; b=owGbwMvMwCU28Zj0gdSKO4sYT6slMWS2Se+s2D7ftmnCb3Xlsz1na9dN5jZ++kXmU/4tW6kqu 47D4sbpHaUsDGJcDLJiiiwO7Sbhcst5KjYbZWrAzGFlAhnCwMUpABMpF2NkaL7o15Ay5SlT9CSm ow6hkt3HTq25w2Blyrd4+aWL7IvnKjEyvP369faEoE2Pz81UX8Slu9Xx9TUvPfut7pOqv5+fcuf NZEYA X-Developer-Key: i=brauner@kernel.org; a=openpgp; fpr=4880B8C9BD0E5106FC070F4F7B3C391EFEA93624 Content-Transfer-Encoding: 8bit Hey Linus, /* Summary */ This contains the changes to support non-blocking timestamp updates. Since 66fa3cedf16a ("fs: Add async write file modification handling.") file_update_time_flags() unconditionally returns -EAGAIN when any timestamp needs updating and IOCB_NOWAIT is set. This makes non-blocking direct writes impossible on file systems with granular enough timestamps, which in practice means all of them. This series reworks the timestamp update path to propagate IOCB_NOWAIT through ->update_time so that file systems which can update timestamps without blocking are no longer penalized. With that groundwork in place, the core change passes IOCB_NOWAIT into ->update_time and returns -EAGAIN only when the file system indicates it would block. XFS implements non-blocking timestamp updates by using the new ->sync_lazytime and open-coding generic_update_time without the S_NOWAIT check, since the lazytime path through the generic helpers can never block in XFS. /* Testing */ gcc (Debian 14.2.0-19) 14.2.0 Debian clang version 19.1.7 (3+b1) No build failures or warnings were observed. /* Conflicts */ Merge conflicts with mainline ============================= No known conflicts. Merge conflicts with other trees ================================ The following changes since commit 8f0b4cce4481fb22653697cced8d0d04027cb1e8: Linux 6.19-rc1 (2025-12-14 16:05:07 +1200) are available in the Git repository at: git@gitolite.kernel.org:pub/scm/linux/kernel/git/vfs/vfs tags/vfs-7.0-rc1.nonblocking_timestamps for you to fetch changes up to 77ef2c3ff5916d358c436911ca6a961060709f04: Merge patch series "re-enable IOCB_NOWAIT writes to files v6" (2026-01-12 14:01:42 +0100) ---------------------------------------------------------------- vfs-7.0-rc1.nonblocking_timestamps Please consider pulling these changes from the signed vfs-7.0-rc1.nonblocking_timestamps tag. Thanks! Christian ---------------------------------------------------------------- Christian Brauner (1): Merge patch series "re-enable IOCB_NOWAIT writes to files v6" Christoph Hellwig (11): fs: remove inode_update_time fs: allow error returns from generic_update_time nfs: split nfs_update_timestamps fat: cleanup the flags for fat_truncate_time fs: refactor ->update_time handling fs: factor out a sync_lazytime helper fs: add a ->sync_lazytime method fs: add support for non-blocking timestamp updates fs: refactor file_update_time_flags xfs: implement ->sync_lazytime xfs: enable non-blocking timestamp updates Documentation/filesystems/locking.rst | 5 +- Documentation/filesystems/vfs.rst | 9 +- fs/bad_inode.c | 3 +- fs/btrfs/inode.c | 13 ++- fs/fat/dir.c | 2 +- fs/fat/fat.h | 11 +- fs/fat/file.c | 14 +-- fs/fat/inode.c | 2 +- fs/fat/misc.c | 59 ++++------ fs/fat/namei_msdos.c | 13 +-- fs/fat/namei_vfat.c | 9 +- fs/fs-writeback.c | 33 ++++-- fs/gfs2/inode.c | 9 +- fs/inode.c | 202 ++++++++++++++++++---------------- fs/internal.h | 3 +- fs/nfs/inode.c | 37 +++---- fs/orangefs/inode.c | 29 +++-- fs/orangefs/orangefs-kernel.h | 3 +- fs/overlayfs/inode.c | 7 +- fs/overlayfs/overlayfs.h | 3 +- fs/sync.c | 4 +- fs/ubifs/file.c | 28 ++--- fs/ubifs/ubifs.h | 3 +- fs/xfs/xfs_iops.c | 49 ++++++--- fs/xfs/xfs_super.c | 29 ----- include/linux/fs.h | 30 +++-- include/trace/events/writeback.h | 6 - 27 files changed, 325 insertions(+), 290 deletions(-)