linux-kernel - Re: [PATCH] DM-CRYPT: Scale to multiple CPUs v3 on 2.6.37-rc* ?

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Message-ID: <20101107203637.GA12615@fritha.org>
Date:	Sun, 7 Nov 2010 21:36:37 +0100
From:	Heinz Diehl <htd@...tha.org>
To:	Matt <jackdachef@...il.com>
Cc:	Milan Broz <mbroz@...hat.com>, Andi Kleen <andi@...stfloor.org>,
	Linux Kernel <linux-kernel@...r.kernel.org>,
	dm-devel@...hat.com, htd@...cy-poultry.org
Subject: Re: [PATCH] DM-CRYPT: Scale to multiple CPUs v3 on 2.6.37-rc* ?

On 07.11.2010, Matt wrote: 

> noatime,nodiratime,barrier=1

One of my systems runs a squid webcache and has a lot of disk load,
and I've never seen data loss or corruption, all the way up from 2.6.34 to
the latest -git.

(Btw: "noatime" superseeds "nodiratime", you can therefore drop it when
"noatime" is set.)

> I read about barrier-problems and data getting to the partition when
> using dm-crypt and several layers so I don't know if that could be
> related

I would rather guess that you have filesystem / harddisk problems,
but I must admit I've never mounted one of my filesystems with barriers
enabled (I use XFS exclusively).

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