linux-kernel - Re: [PATCH] disable barriers in dm-crypt [was Re: BUG: Files corrupt after moving LVM volume to USB disk]

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Date:	Mon, 26 Mar 2007 03:05:19 +0300
From:	"Marti Raudsepp" <marti@...fo.org>
To:	"Milan Broz" <mbroz@...hat.com>
Cc:	"Alasdair G Kergon" <agk@...hat.com>,
	"Lennart Sorensen" <lsorense@...lub.uwaterloo.ca>,
	"device-mapper development" <dm-devel@...hat.com>,
	"Kernel hackers" <linux-kernel@...r.kernel.org>,
	"Andrew Morton" <akpm@...ux-foundation.org>,
	"Christophe Saout" <christophe@...ut.de>
Subject: Re: [PATCH] disable barriers in dm-crypt [was Re: BUG: Files corrupt after moving LVM volume to USB disk]

On 3/23/07, Milan Broz <mbroz@...hat.com> wrote:
> Disable barriers in dm-crypt because of current workqueue processing
> can reorder requests.
>
> --- linux-2.6.20.1.orig/drivers/md/dm-crypt.c   2007-03-23 15:07:11.000000000 +0100
> +++ linux-2.6.20.1/drivers/md/dm-crypt.c        2007-03-23 15:09:59.000000000 +0100
> +       if (bio_barrier(bio))
> +               return -EOPNOTSUPP;
> +

Sorry, this doesn't help either. ext3 is still slow, reiserfs still fails.

(And sorry for the double e-mail, I forgot to reply to all)

Marti Raudsepp
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