Re: Block layer still stack abuser?

[Christoph Hellwig]

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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