linux-kernel - Re: [PATCH 0/5] Enable per-file/directory DAX operations

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Message-ID: <CAPcyv4juj9E1qKSXzOVfugmd=rBLZAvfbDdZT6ut0LdWwza=xA@mail.gmail.com>
Date:   Fri, 1 Nov 2019 21:25:15 -0700
From:   Dan Williams <dan.j.williams@...el.com>
To:     Dave Chinner <david@...morbit.com>
Cc:     Ira Weiny <ira.weiny@...el.com>, Boaz Harrosh <boaz@...xistor.com>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        Alexander Viro <viro@...iv.linux.org.uk>,
        "Darrick J. Wong" <darrick.wong@...cle.com>,
        Christoph Hellwig <hch@....de>,
        "Theodore Y. Ts'o" <tytso@....edu>, Jan Kara <jack@...e.cz>,
        linux-ext4 <linux-ext4@...r.kernel.org>,
        linux-xfs <linux-xfs@...r.kernel.org>,
        linux-fsdevel <linux-fsdevel@...r.kernel.org>
Subject: Re: [PATCH 0/5] Enable per-file/directory DAX operations

On Fri, Nov 1, 2019 at 3:47 PM Dave Chinner <david@...morbit.com> wrote:
[..]
> No, the flag does not get turned on until we've solved the problems
> that resulted in us turning it off. We've gone over this mutliple
> times, and nobody has solved the issues that need solving - everyone
> seems to just hack around the issues rather than solving it
> properly. If we thought taking some kind of shortcut full of
> compromises and gotchas was the right solution, we would have never
> turned the flag off in the first place.

My fault. I thought the effective vs physical distinction was worth
taking an incremental step forward. Ira was continuing to look at the
a_ops issue in the meantime.