Date: Tue, 24 Nov 2015 00:12:15 -0700
From: Jason Gunthorpe <jgunthorpe@obsidianresearch.com>
To: Christoph Hellwig <hch@infradead.org>
Cc: Tom Talpey <tom@talpey.com>, Chuck Lever <chuck.lever@oracle.com>,
        linux-rdma@vger.kernel.org, linux-nfs@vger.kernel.org,
        Sagi Grimberg <sagig@mellanox.com>, santosh.shilimkar@oracle.com
Subject: Re: Future of FMR support, was: Re: [PATCH v1 5/9] xprtrdma: Add
 ro_unmap_sync method for FMR
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On Mon, Nov 23, 2015 at 10:52:26PM -0800, Christoph Hellwig wrote:
> 
> So at lest for 4.5 we're unlikely to be able to get rid of it alone
> due to the RDS issue.  We'll then need performance numbers for mlx4,
> and figure out how much we care about mthca.

mthca is unfortunately very popular in the used market, it is very
easy to get cards, build a cheap test cluster, etc. :(

Jason