Re: Re: [PATCH] Implement barrier support for single device DM devices

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On Mon, Feb 18, 2008 at 08:52:10AM -0500, Ric Wheeler wrote:
> I understand that. Most of the time, dm or md devices are composed of 
> uniform components which will uniformly support (or not) the cache flush 
> commands used by barriers.
 
As a dm developer, it's "almost none of the time" because trivial
configurations aren't the ones that require lots of testing effort.

Let's stop arguing over "most of the time":-)

As Andi points out, there are certainly enough real-world users of
"single linear or crypt target using one physical device" for it to be
worth our supporting it.

Alasdair
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agk@xxxxxxxxxx

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