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Re: Write barrier support with LVM2/md

To: Martin Lucina <mato@xxxxxxxxxx>
Subject: Re: Write barrier support with LVM2/md
From: Chris Wedgwood <cw@xxxxxxxx>
Date: Fri, 22 Sep 2006 14:24:35 -0700
Cc: xfs@xxxxxxxxxxx
In-reply-to: <20060922104417.GA4161@dezo.moloch.sk>
References: <20060922104417.GA4161@dezo.moloch.sk>
Sender: xfs-bounce@xxxxxxxxxxx
On Fri, Sep 22, 2006 at 12:44:17PM +0200, Martin Lucina wrote:

> Is anyone working on a fix for this?  It might be a good idea to add
> to the FAQ that write barriers are not supported on dm devices.

it's not really an XFS issue, it's that the md/dm/lvm layers don't
support write barriers (and it would in many cases be hard to support
without killing performance).


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