linux-ext4 - Re: [PATCH 1/2] dax: Pass detailed error code from dax_iomap

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Date:   Thu, 21 Dec 2017 10:16:44 -0700
From:   Ross Zwisler <ross.zwisler@...ux.intel.com>
To:     Jan Kara <jack@...e.cz>
Cc:     linux-ext4@...r.kernel.org, Ted Tso <tytso@....edu>,
        Ross Zwisler <ross.zwisler@...ux.intel.com>,
        Dan Williams <dan.j.williams@...el.com>,
        linux-fsdevel@...r.kernel.org, linux-nvdimm@...ts.01.org
Subject: Re: [PATCH 1/2] dax: Pass detailed error code from dax_iomap_fault()

On Thu, Dec 21, 2017 at 05:30:54PM +0100, Jan Kara wrote:
> Ext4 needs to pass through error from its iomap handler to the page
> fault handler so that it can properly detect ENOSPC and force
> transaction commit and retry the fault (and block allocation). Add
> argument to dax_iomap_fault() for passing such error.
> 
> Signed-off-by: Jan Kara <jack@...e.cz>

I like how much simpler this version is.  Looks good.

Reviewed-by: Ross Zwisler <ross.zwisler@...ux.intel.com>