linux-kernel - Re: Block layer still stack abuser?

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Message-ID: <20070222034424.GC9027@infradead.org>
Date:	Thu, 22 Feb 2007 03:44:24 +0000
From:	Christoph Hellwig <hch@...radead.org>
To:	Neil Brown <neilb@...e.de>
Cc:	Pierre Ossman <drzeus-list@...eus.cx>,
	LKML <linux-kernel@...r.kernel.org>, schwidefsky@...ibm.com
Subject: Re: Block layer still stack abuser?

On Thu, Feb 22, 2007 at 01:48:00PM +1100, Neil Brown wrote:
> Might this:
>    http://lkml.org/lkml/2007/2/10/22
> 
> relate to your question?
> If you are talking about stacking block device (via dm or md), then a
> patch to fix this in in -mm but there are or were some potential
> issues in dm that seem to be holding it up.

What are the current blocking issues?  There are a lot of users of dm/md
double-stacking (e.g. mirroring + multipath) that are in deep trouble
currently and could be helped greatly with this patch.
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