From: Dave Chinner <david@fromorbit.com>
To: Josef Bacik <jbacik@fb.com>
Cc: Chris Murphy <lists@colorremedies.com>,
Btrfs BTRFS <linux-btrfs@vger.kernel.org>
Subject: Re: BUG: >16TB Btrfs volumes are mountable on 32 bit kernels
Date: Fri, 28 Feb 2014 15:38:07 +1100 [thread overview]
Message-ID: <20140228043807.GC13647@dastard> (raw)
In-Reply-To: <530FA8FA.9020700@fb.com>
On Thu, Feb 27, 2014 at 04:07:06PM -0500, Josef Bacik wrote:
> -----BEGIN PGP SIGNED MESSAGE-----
> Hash: SHA1
>
> On 02/27/2014 04:05 PM, Chris Murphy wrote:
> > User reports successfully formatting and using an ~18TB Btrfs
> > volume on hardware raid5 using i686 kernel for over a year, and
> > then suddenly the file system starts behaving weirdly:
> >
> > https://urldefense.proofpoint.com/v1/url?u=http://www.mail-archive.com/linux-btrfs%40vger.kernel.org/msg31856.html&k=ZVNjlDMF0FElm4dQtryO4A%3D%3D%0A&r=cKCbChRKsMpTX8ybrSkonQ%3D%3D%0A&m=6eUt5RgBggFh930oFrH19iR4z%2BFVzT%2F0%2F4dYPt3g48U%3D%0A&s=5ac126734d7fa1d3238ab09a2ddc021a8dcc8fff7b022560a4d068be2de37c00
> >
> >
> >
> > I think this is due to the kernel page cache address space being
> > 16TB limited on 32-bit kernels, as mentioned by Dave Chinner in
> > this thread:
> >
> > https://urldefense.proofpoint.com/v1/url?u=http://oss.sgi.com/pipermail/xfs/2014-February/034588.html&k=ZVNjlDMF0FElm4dQtryO4A%3D%3D%0A&r=cKCbChRKsMpTX8ybrSkonQ%3D%3D%0A&m=6eUt5RgBggFh930oFrH19iR4z%2BFVzT%2F0%2F4dYPt3g48U%3D%0A&s=3e45f9288e6a77bc1a24dded368802c2ab46b812bf59953f74d4ee1d4141f7d2
> >
> > So it sounds like it shouldn't be possible to mount a Btrfs volume
> > larger than 16TB on 32-bit kernels. This is consistent with ext4
> > and XFS which refuse to mount large file systems.
> >
> >
>
> Well that's not good, I'll fix this up. Thanks,
Well, don't go assuming there's a problem just because I made an
off-hand comment. i.e my comment was simply "maybe it hasn't been
tested", and not an assertion that there is a bug or a problem....
Cheers,
Dave.
--
Dave Chinner
david@fromorbit.com
next prev parent reply other threads:[~2014-02-28 4:38 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-02-27 21:05 BUG: >16TB Btrfs volumes are mountable on 32 bit kernels Chris Murphy
2014-02-27 21:07 ` Josef Bacik
2014-02-27 21:13 ` Chris Murphy
2014-02-28 4:38 ` Dave Chinner [this message]
2014-02-28 13:05 ` Josef Bacik
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