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Date: Fri, 16 Sep 2011 05:24:16 -0400
From: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
To: Christoph Hellwig <hch@infradead.org>, Jan Kara <jack@suse.cz>
Cc: Jan Kara <jack@suse.cz>, Jan Beulich <JBeulich@suse.com>,
        Jeremy Fitzhardinge <jeremy@goop.org>, axboe@kernel.dk,
        linux-kernel@vger.kernel.org
Subject: Re: [PATCH]: xen/blkback: Add support for old BARRIER requests -
 'feature-barrier', was "Help with implementing some form of barriers in 3.0
 kernels."
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On Thu, Sep 15, 2011 at 11:15:40AM -0400, Christoph Hellwig wrote:
> Btw, I'm really against exporting any of the low-level request/elevator
> code interfaces.  I have plans for huge changes in that area, and having
> someone poke into it is just a bad idea.

Thanks for the heads up.
> 
> Try to take a look at the barrier era dm implementation of them, which
> did the draining on the bio layer and copy & paste that.

Jan (K), do you want to poke at that and re-use the patch of yours which I
have been altering?