From patchwork Wed Aug 5 15:32:14 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Darrick J. Wong" X-Patchwork-Id: 11702493 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id BF25114DD for ; Wed, 5 Aug 2020 20:07:00 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id AB35922CAD for ; Wed, 5 Aug 2020 20:07:00 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1596658020; bh=EA9UGfVrvbiVPmDZOGPrf0JRFEMVJpI+PydD5PB6PFw=; h=Date:From:To:Cc:Subject:List-ID:From; b=wqehGSBcML3YsgsInnsYB5FJqAAJQ51idgDcs4Yu6S/lgKFDo/VEOFGl4DJXKslrY BGGB1o8LcrHTo9P5UrZi8o0bXfSsAmyCXwqrsqMy4vwewOBT6ErH+idgRCCoZLR32R eLLNFmbnWTYnRI6BSgBgQZSPTniHKLQRLb2rto+0= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1729799AbgHEUG4 (ORCPT ); Wed, 5 Aug 2020 16:06:56 -0400 Received: from mail.kernel.org ([198.145.29.99]:50648 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726961AbgHEQeP (ORCPT ); Wed, 5 Aug 2020 12:34:15 -0400 Received: from localhost (c-67-169-218-210.hsd1.or.comcast.net [67.169.218.210]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 517252333F; Wed, 5 Aug 2020 15:32:15 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1596641535; bh=EA9UGfVrvbiVPmDZOGPrf0JRFEMVJpI+PydD5PB6PFw=; h=Date:From:To:Cc:Subject:From; b=a7onUlKCysNFqUi24LerBJz4ZK8a5CWsAnRZAY8sSG+G6kMIS4sDXZGcX5a1c6oRk 6c05X0bAHo84vGahPRRxUqFpKMNpfKcbDuoCilUKWJ337OsMJbLNlDPiPqx83DPIEf QTcX3EuGffXsf+upbBuAh3noAMHYkh+a8bqsg2D8= Date: Wed, 5 Aug 2020 08:32:14 -0700 From: "Darrick J. Wong" To: Linus Torvalds Cc: "Darrick J. Wong" , linux-fsdevel@vger.kernel.org, linux-xfs@vger.kernel.org, david@fromorbit.com, linux-kernel@vger.kernel.org, sandeen@sandeen.net, hch@lst.de, linux-ext4 , Theodore Ts'o , riteshh@linux.ibm.com, rgoldwyn@suse.de, agruenba@redhat.com, linux-btrfs@vger.kernel.org Subject: [GIT PULL] iomap: new code for 5.9-rc1 Message-ID: <20200805153214.GA6090@magnolia> MIME-Version: 1.0 Content-Disposition: inline Sender: linux-btrfs-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-btrfs@vger.kernel.org Hi Linus, Please pull these new changes to the iomap code for 5.9. The most notable changes are: 1) iomap no longer invalidate the page cache when performing a direct read, since doing so is unnecessary and the old directio code doesn't do that either. 2) iomap embraced the use of returning ENOTBLK from a direct write to trigger falling back to a buffered write since ext4 already did this and btrfs wants it for their port. 3) iomap falls back to buffered writes if we're doing a direct write and the page cache invalidation after the flush fails; this was necessary to handle a corner case in the btrfs port. The branch merges cleanly with your HEAD branch as of 15m ago. Please let me know if there are any strange problems. --D The following changes since commit dcb7fd82c75ee2d6e6f9d8cc71c52519ed52e258: Linux 5.8-rc4 (2020-07-05 16:20:22 -0700) are available in the Git repository at: git://git.kernel.org/pub/scm/fs/xfs/xfs-linux.git tags/iomap-5.9-merge-4 for you to fetch changes up to 66143873c6a0b24242f24f65fde70c643b26b4e7: iomap: fall back to buffered writes for invalidation failures (2020-07-23 22:45:59 -0700) ---------------------------------------------------------------- New code for 5.9: - Make sure we call ->iomap_end with a failure code if ->iomap_begin failed in any way; some filesystems need to try to undo things. - Don't invalidate the page cache during direct reads since we already sync'd the cache with disk. - Make direct writes fall back to the page cache if the pre-write cache invalidation fails. This avoids a cache coherency problem. ---------------------------------------------------------------- Andreas Gruenbacher (1): iomap: Make sure iomap_end is called after iomap_begin Christoph Hellwig (2): xfs: use ENOTBLK for direct I/O to buffered I/O fallback iomap: fall back to buffered writes for invalidation failures Dave Chinner (1): iomap: Only invalidate page cache pages on direct IO writes fs/ext4/file.c | 2 ++ fs/gfs2/file.c | 3 ++- fs/iomap/apply.c | 13 +++++++++---- fs/iomap/direct-io.c | 37 +++++++++++++++++++++---------------- fs/iomap/trace.h | 1 + fs/xfs/xfs_file.c | 8 ++++---- fs/zonefs/super.c | 7 +++++-- 7 files changed, 44 insertions(+), 27 deletions(-)