linux-ext4 - Re: [PATCH v2 2/9] ext2: tell DAX the size of allocation holes

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Date:   Sat, 10 Sep 2016 00:31:51 -0700
From:   Christoph Hellwig <hch@...radead.org>
To:     Dan Williams <dan.j.williams@...el.com>
Cc:     Matthew Wilcox <mawilcox@...rosoft.com>,
        Ross Zwisler <ross.zwisler@...ux.intel.com>,
        Theodore Ts'o <tytso@....edu>,
        Christoph Hellwig <hch@...radead.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        Andrew Morton <akpm@...ux-foundation.org>,
        "linux-nvdimm@...1.01.org" <linux-nvdimm@...1.01.org>,
        Dave Chinner <david@...morbit.com>,
        "linux-mm@...ck.org" <linux-mm@...ck.org>,
        Andreas Dilger <adilger.kernel@...ger.ca>,
        Alexander Viro <viro@...iv.linux.org.uk>,
        Jan Kara <jack@...e.com>,
        "linux-fsdevel@...r.kernel.org" <linux-fsdevel@...r.kernel.org>,
        "linux-ext4@...r.kernel.org" <linux-ext4@...r.kernel.org>
Subject: Re: [PATCH v2 2/9] ext2: tell DAX the size of allocation holes

On Fri, Sep 09, 2016 at 03:34:43PM -0700, Dan Williams wrote:
> I agree with you that continuing to touch ext2 is not a good idea, but
> I'm not yet convinced that now is the time to go do dax-2.0 when we
> haven't finished shipping dax-1.0.

I've mentioned this before, but I'd like to repeat it.  With all the
work reqwuired in the file system I would prefer to drop DAX support
in ext2 (and if people really cry for it reinstate the trivial old xip
support).
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