Date: Sun, 26 Jul 2015 08:53:04 -0700
From: Christoph Hellwig <hch@infradead.org>
To: Sagi Grimberg <sagig@dev.mellanox.co.il>
Cc: Christoph Hellwig <hch@infradead.org>,
        Steve Wise <swise@opengridcomputing.com>, dledford@redhat.com,
        infinipath@intel.com, sagig@mellanox.com, ogerlitz@mellanox.com,
        roid@mellanox.com, linux-rdma@vger.kernel.org, eli@mellanox.com,
        target-devel@vger.kernel.org, linux-nfs@vger.kernel.org,
        bfields@fieldses.org
Subject: Re: [PATCH V6 6/9] isert: Rename IO functions to more descriptive
 names
Message-ID: <20150726155304.GA32464@infradead.org>
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 <55B4B190.7070305@dev.mellanox.co.il>
 <20150726104328.GB18944@infradead.org>
 <55B4BDE3.8040801@dev.mellanox.co.il>
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Sender: linux-nfs-owner@vger.kernel.org

On Sun, Jul 26, 2015 at 02:00:51PM +0300, Sagi Grimberg wrote:
> On the wire iser sends a single rkey, but the target is allowed to
> transfer the data however it wants to.

So you're trying to get above the limit of a single RDMA READ, not
above the limit for memory registration in the initiator?  In that
case your explanation makes sense, that's just not what I expected
to be the limiting factor.