From: Phillip Susi <psusi@cfl.rr.com>
To: device-mapper development <dm-devel@redhat.com>
Subject: Re: 2 TB wraparound on 32 bit host
Date: Sat, 12 Jun 2010 11:45:20 -0400 [thread overview]
Message-ID: <4C13AB90.1070802@cfl.rr.com> (raw)
In-Reply-To: <1276290990.2862.161.camel@mulgrave.site>
On 06/11/2010 05:16 PM, James Bottomley wrote:
> So best guess is that CONFIG_LBDAF isn't set. This would make all
> sector_t counts wrap at 2TB (32 bits worth of 512 bytes). It would be
> rather a daft thing for a distribution not to have set, though ...
Bingo, thanks. It doesn't seem to be set on this machine running the
amd64 2.6.32 lucid build which also appears to suffer the same problem.
If this config option isn't set though, shouldn't the kernel fail
calls like llseek() that try to exceed the limit, rather than silently
wrap around to the wrong address?
next prev parent reply other threads:[~2010-06-12 15:45 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-06-11 20:57 2 TB wraparound on 32 bit host Phillip Susi
2010-06-11 21:16 ` James Bottomley
2010-06-12 15:45 ` Phillip Susi [this message]
2010-06-12 16:03 ` James Bottomley
2010-06-12 16:09 ` James Bottomley
2010-06-12 17:58 ` Phillip Susi
2010-06-12 18:47 ` 2 TB wraparound on snapshots Phillip Susi
2010-06-12 20:03 ` James Bottomley
2010-06-12 22:03 ` Phillip Susi
2010-06-15 14:57 ` 2 TB wraparound on snapshots on kernels < 2.6.33 Phillip Susi
2010-06-16 13:13 ` Mikulas Patocka
2010-06-16 13:45 ` Mikulas Patocka
2010-06-16 13:52 ` Phillip Susi
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