linux-kernel - Re: [PATCH 1/7] fs: allow per-device dax status checking for filesystems

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Message-ID: <20180525154229.GA11044@linux.intel.com>
Date:   Fri, 25 May 2018 09:42:29 -0600
From:   Ross Zwisler <ross.zwisler@...ux.intel.com>
To:     "Darrick J. Wong" <darrick.wong@...cle.com>
Cc:     Ross Zwisler <ross.zwisler@...ux.intel.com>,
        Toshi Kani <toshi.kani@....com>,
        Mike Snitzer <snitzer@...hat.com>, dm-devel@...hat.com,
        linux-fsdevel@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-nvdimm@...ts.01.org, xfs <linux-xfs@...r.kernel.org>
Subject: Re: [PATCH 1/7] fs: allow per-device dax status checking for
 filesystems

On Thu, May 24, 2018 at 10:02:18PM -0700, Darrick J. Wong wrote:
> On Thu, May 24, 2018 at 08:55:12PM -0600, Ross Zwisler wrote:
> > From: "Darrick J. Wong" <darrick.wong@...cle.com>
> > 
> > Remove __bdev_dax_supported and change to bdev_dax_supported that takes a
> > bdev parameter.  This enables multi-device filesystems like xfs to check
> > that a dax device can work for the particular filesystem.  Once that's
> > in place, actually fix all the parts of XFS where we need to be able to
> > distinguish between datadev and rtdev.
> > 
> > This patch fixes the problem where we screw up the dax support checking
> > in xfs if the datadev and rtdev have different dax capabilities.
> > 
> > Signed-off-by: Darrick J. Wong <darrick.wong@...cle.com>
> > Signed-off-by: Ross Zwisler <ross.zwisler@...ux.intel.com>
> 
> Reviewed-by: Darr...oh, I'm not allowed to do that, am I?
> 
> Would you mind (re)sending this to the xfs list so that someone else can
> review it?
> 
> --D

Thanks for the review, Darrick.

I think at one point Dave said that if you touch more than 1 filesystem with a
series you should just CC linux-fsdevel and omit the individual filesystems?
I realize that this series only touches ext2 and ext4 a little, but that's
what I opted for.

Is that sufficient to get to the rest of the XFS developers, or would you like
a resend adding linux-xfs?