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:   Tue, 13 Jun 2017 23:47:31 -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 Tue, Jun 13, 2017 at 06:24:32AM -0400, Jeff Layton wrote:
> That's definitely what I want for the endgame here. My plan was to add
> this flag for now, and then eventually reverse it (or drop it) once all
> or most filesystems are converted.
> 
> We can do it that way from the get-go if you like. It'll mean tossing in
>  a patch add this flag to all filesystems that have an fsync operation
> and that use the pagecache, and then gradually remove it from them as we
> convert them.
> 
> Which method do you prefer?

Please do it from the get-go.  Or in fact figure out if we can get
away without it entirely.  Moving the error reporting into ->fsync
should help greatly with that, so what's missing after that?