From: Ted Ts'o <tytso@mit.edu>
Subject: Re: hunt for 2.6.37 dm-crypt+ext4 corruption? (was: Re: dm-crypt
 barrier support is effective)
Date: Thu, 9 Dec 2010 13:01:11 -0500
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Cc: Mike Snitzer <snitzer@redhat.com>,
	Chris Mason <chris.mason@oracle.com>,
	Matt <jackdachef@gmail.com>, Milan Broz <mbroz@redhat.com>,
	Andi Kleen <andi@firstfloor.org>,
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	Linux Kernel <linux-kernel@vger.kernel.org>,
	htd <htd@fancy-poultry.org>, htejun@gmail.com,
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To: Jon Nelson <jnelson@jamponi.net>
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On Tue, Dec 07, 2010 at 09:37:20PM -0600, Jon Nelson wrote:
> One difference is the location of the transaction logs (pg_xlog). In
> my case, /var/lib/pgsql/data *is* mountpoint for the test volume
> (actually, it's a symlink to the mount point). In your case, that is
> not so. Perhaps that makes a difference?  pgsql_tmp might also be on
> two different volumes in your case (I can't be sure).

I just tried tried to run t.sql five times with /var/lib/postgres as a
mountpoint for a 5400 rpm disk, and I still haven't been able to
replicate it.

If you can point out how to query pgsql_tmp (I'm using a completely
default postgres install), that would be helpful, but I don't think it
would be going anywhere else.

Still trying....

						- Ted