linux-ext4 - Re: hunt for 2.6.37 dm-crypt+ext4 corruption? (was: Re: dm-crypt barrier support is effective)

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Date:	Thu, 9 Dec 2010 13:01:11 -0500
From:	Ted Ts'o <tytso@....edu>
To:	Jon Nelson <jnelson@...poni.net>
Cc:	Mike Snitzer <snitzer@...hat.com>,
	Chris Mason <chris.mason@...cle.com>,
	Matt <jackdachef@...il.com>, Milan Broz <mbroz@...hat.com>,
	Andi Kleen <andi@...stfloor.org>,
	linux-btrfs <linux-btrfs@...r.kernel.org>,
	dm-devel <dm-devel@...hat.com>,
	Linux Kernel <linux-kernel@...r.kernel.org>,
	htd <htd@...cy-poultry.org>, htejun@...il.com,
	linux-ext4@...r.kernel.org
Subject: Re: hunt for 2.6.37 dm-crypt+ext4 corruption? (was: Re: dm-crypt
 barrier support is effective)

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
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