linux-ext4 - Re: [PATCH v6 12/20] fs: add a new fstype flag to indicate how writeback errors are tracked

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Date:   Thu, 15 Jun 2017 01:22:21 -0700
From:   Christoph Hellwig <hch@...radead.org>
To:     Jeff Layton <jlayton@...hat.com>
Cc:     Christoph Hellwig <hch@...radead.org>,
        Andrew Morton <akpm@...ux-foundation.org>,
        Al Viro <viro@...IV.linux.org.uk>, Jan Kara <jack@...e.cz>,
        tytso@....edu, axboe@...nel.dk, mawilcox@...rosoft.com,
        ross.zwisler@...ux.intel.com, corbet@....net,
        Chris Mason <clm@...com>, Josef Bacik <jbacik@...com>,
        David Sterba <dsterba@...e.com>,
        "Darrick J . Wong" <darrick.wong@...cle.com>,
        linux-fsdevel@...r.kernel.org, linux-mm@...ck.org,
        linux-ext4@...r.kernel.org, linux-xfs@...r.kernel.org,
        linux-btrfs@...r.kernel.org, linux-block@...r.kernel.org
Subject: Re: [PATCH v6 12/20] fs: add a new fstype flag to indicate how
 writeback errors are tracked

On Wed, Jun 14, 2017 at 01:24:43PM -0400, Jeff Layton wrote:
> In this smaller set, it's only really used for DAX.

DAX only is implemented by three filesystems, please just fix them
up in one go.

> sync_file_range: ->fsync isn't called directly there, and I think we
> probably want similar semantics to fsync() for it

sync_file_range is only supposed to sync data, so it should not call
->fsync.

> JBD2: will try to re-set the error after clearing it with
> filemap_fdatawait. That's problematic with the new infrastructure so we
> need some way to avoid it.

JBD2 only has two users, please fix them up in one go.