linux-ext4 - Re: [RFC PATCH 0/4] fs: introduce new writeback error tracking infrastructure and convert ext4 to use it

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Message-ID: <20170403145107.GC30811@bombadil.infradead.org>
Date:   Mon, 3 Apr 2017 07:51:07 -0700
From:   Matthew Wilcox <willy@...radead.org>
To:     NeilBrown <neilb@...e.com>
Cc:     Jeff Layton <jlayton@...hat.com>, linux-fsdevel@...r.kernel.org,
        linux-kernel@...r.kernel.org, linux-ext4@...r.kernel.org,
        akpm@...ux-foundation.org, tytso@....edu, jack@...e.cz
Subject: Re: [RFC PATCH 0/4] fs: introduce new writeback error tracking
 infrastructure and convert ext4 to use it

On Mon, Apr 03, 2017 at 02:25:11PM +1000, NeilBrown wrote:
> I don't like that you need to add a 'flush' handler to every filesystem,
> most of which just call
>  +	return filemap_report_wb_error(file);
> 
> Could we just have
> 	if (filp->f_op->flush)
> 		retval = filp->f_op->flush(filp, id);
> +	else
> +		retval = filemap_report_wb_error(filp);
> in flip_close() ??

Maybe this is badly named as ext4_flush_file().  Maybe this should be
generic_flush_file(), and then there's no per-filesystem overhead to this?