linux-ext4 - Re: [PATCH v2 1/2] fs, xfs: perform dax

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Message-ID: <20170829213635.GA8946@lst.de>
Date:   Tue, 29 Aug 2017 23:36:35 +0200
From:   Christoph Hellwig <hch@....de>
To:     Dan Williams <dan.j.williams@...el.com>
Cc:     Christoph Hellwig <hch@....de>,
        linux-fsdevel <linux-fsdevel@...r.kernel.org>,
        Jan Kara <jack@...e.cz>,
        "linux-nvdimm@...ts.01.org" <linux-nvdimm@...ts.01.org>,
        "Darrick J. Wong" <darrick.wong@...cle.com>,
        linux-xfs@...r.kernel.org, linux-ext4 <linux-ext4@...r.kernel.org>
Subject: Re: [PATCH v2 1/2] fs, xfs: perform dax_device lookup at mount

On Tue, Aug 29, 2017 at 02:35:27PM -0700, Dan Williams wrote:
> Actually, why not just do this directly in xfs_fs_mount()? I think I
> can refactor this to not touch mount_bdev() and put all the details in
> the per-fs mount/umount paths.

Yes, and just cache in in the fs specific superblock.