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Date:   Wed, 22 Sep 2021 16:06:09 +0300
From:   Leon Romanovsky <leon@kernel.org>
To:     Junji Wei <weijunji@bytedance.com>
Cc:     Jason Gunthorpe <jgg@nvidia.com>,
        Doug Ledford <dledford@redhat.com>, mst <mst@redhat.com>,
        Jason Wang <jasowang@redhat.com>, yuval.shaia.ml@gmail.com,
        marcel.apfelbaum@gmail.com, Cornelia Huck <cohuck@redhat.com>,
        Hannes Reinecke <hare@suse.de>,
        Yongji Xie <xieyongji@bytedance.com>,
        =?utf-8?B?5p+056iz?= <chaiwen.cc@bytedance.com>,
        RDMA mailing list <linux-rdma@vger.kernel.org>,
        virtualization <virtualization@lists.linux-foundation.org>,
        qemu-devel <qemu-devel@nongnu.org>
Subject: Re: [RFC 0/5] VirtIO RDMA
Message-ID: <YUsqQY5zY00bj4ul@unreal>
References: <20210902130625.25277-1-weijunji@bytedance.com>
 <20210915134301.GA211485@nvidia.com>
 <E8353F66-4F9E-4A6A-8AB2-2A7F84DF4104@bytedance.com>
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On Wed, Sep 22, 2021 at 08:08:44PM +0800, Junji Wei wrote:
> > On Sep 15, 2021, at 9:43 PM, Jason Gunthorpe <jgg@nvidia.com> wrote:

<...>

> >> 4. The FRMR api need to set key of MR through IB_WR_REG_MR.
> >>   But it is impossible to change a key of mr using uverbs.
> > 
> > FRMR is more like memory windows in user space, you can't support it
> > using just regular MRs.
> 
> It is hard to support this using uverbs, but it is easy to support
> with uRDMA that we can get full control of mrs.

What is uRDMA?

Thanks