Re: Future of FMR support, was: Re: [PATCH v1 5/9] xprtrdma: Add ro_unmap_sync method for FMR

[santosh shilimkar <santosh.shilimkar@oracle.com>]

On 11/25/2015 1:00 AM, Christoph Hellwig wrote:
> On Tue, Nov 24, 2015 at 01:54:02PM -0800, santosh shilimkar wrote:
>> As already indicated to Sagi [1], RDS IB FR support is work in
>> progress and I was hoping to get it ready for 4.5. There are few
>> issues we found with one of the HCA and hence the progress
>> slowed down. Looking at where we are, 4.6 merge window seems
>> to be realistic for me to get RDS FR support.
>
> Ok.
>
>> Now on the iWARP transport itself, it has been bit tough because
>> of lack of hardware to tests. I have been requesting test(s) in
>> previous RDS patches and haven't seen any interest so far. If
>> this continues to be the trend, I might as well get rid of
>> RDS iWARP support after couple of merge windows.
>
> I'd say drop the current iWarp transport if it's not testable.  The
> only real difference between IB and iWarp is the needed to create
> a MR for the RDMA READ sink, and we're much better of adding that into
> the current IB transport if new iWarp users show up.

Agree. I will probably do it along with RDS IB FR support in 4.6

Regards,
Santosh