From: Christoph Hellwig <hch@infradead.org>
To: Theodore Ts'o <tytso@mit.edu>
Cc: Christoph Hellwig <hch@infradead.org>,
linux-ext4@vger.kernel.org, Lukas Czerner <lczerner@redhat.com>,
linux-xfs@vger.kernel.org
Subject: Re: [PATCH] ext4: introduce per-inode DAX flag
Date: Fri, 25 Aug 2017 08:40:32 -0700 [thread overview]
Message-ID: <20170825154032.GA1827@infradead.org> (raw)
In-Reply-To: <20170825151445.ycf5xomoxvebgaez@thunk.org>
On Fri, Aug 25, 2017 at 11:14:45AM -0400, Theodore Ts'o wrote:
> > I don't know of anyone that actually uses the flag. If someone did
> > that would probably run into problems like changing that changing it
> > on a file that's currently mmaped would crash an burn badly.
>
> Crash and burn meaning the *kernel* will crash and burn? Or will data
> be damaged?
>
> Given that, maybe XFS should withdraw support for the DAX and hope no
> one is actually using it?
Nah, -o dax works very well. It's just the flag instead of the -o dax
option or rather switching it on a mapped file will probably be very dangerous.
>
> - Ted
>
>
>
> --
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---end quoted text---
next prev parent reply other threads:[~2017-08-25 15:40 UTC|newest]
Thread overview: 24+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-08-02 16:09 [PATCH] ext4: introduce per-inode DAX flag Lukas Czerner
2017-08-05 8:46 ` Christoph Hellwig
2017-08-07 12:12 ` Lukas Czerner
2017-08-08 9:00 ` Lukas Czerner
2017-08-11 10:01 ` Christoph Hellwig
2017-08-11 12:11 ` Lukas Czerner
2017-08-11 12:58 ` Christoph Hellwig
2017-08-11 13:41 ` Lukas Czerner
2017-08-24 18:20 ` Theodore Ts'o
2017-08-25 7:54 ` Christoph Hellwig
2017-08-25 15:14 ` Theodore Ts'o
2017-08-25 15:40 ` Christoph Hellwig [this message]
2017-08-25 16:28 ` Theodore Ts'o
2017-08-25 23:33 ` Dave Chinner
2017-08-28 7:38 ` Christoph Hellwig
2017-08-28 10:10 ` Dave Chinner
2017-08-29 15:49 ` Jan Kara
2017-08-29 22:57 ` Dave Chinner
2017-08-30 10:00 ` Jan Kara
2017-08-30 12:34 ` Christoph Hellwig
2017-08-30 15:00 ` Theodore Ts'o
2017-08-30 15:30 ` Lukas Czerner
2017-08-30 15:29 ` Jan Kara
2017-08-30 16:05 ` Jan Kara
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