Re: [PATCH v3 0/5] Reduce RDMA RW API SGE limit

[Laurence Oberman <loberman-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>]

----- Original Message -----
> From: "Bart Van Assche" <bart.vanassche-XdAiOPVOjttBDgjK7y7TUQ@public.gmane.org>
> To: "Doug Ledford" <dledford-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
> Cc: "Christoph Hellwig" <hch-jcswGhMUV9g@public.gmane.org>, "Sagi Grimberg" <sagi-NQWnxTmZq1alnMjI0IkVqw@public.gmane.org>, "Steve Wise" <swise-7bPotxP6k4+P2YhJcF5u+vpXobYPEAuW@public.gmane.org>,
> "Parav Pandit" <pandit.parav-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>, "Laurence Oberman" <loberman-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>, "Nicholas A. Bellinger"
> <nab-IzHhD5pYlfBP7FQvKIMDCQ@public.gmane.org>, linux-rdma-u79uwXL29TY76Z2rM5mHXA@public.gmane.org
> Sent: Tuesday, July 19, 2016 12:20:45 PM
> Subject: [PATCH v3 0/5] Reduce RDMA RW API SGE limit
> 
> Hello Doug,
> 
> The five patches in this series modify the RDMA RW API slightly. This is
> needed to avoid that the SRP and iSER target drivers submit RDMA
> requests with an SGE list that exceeds the queue pair limits. The
> ib_srpt changes in this series have been tested but the ib_isert changes
> not yet.
> 
> The changes compared to v2 of this patch series are:
> * For RDMA READs, limit SGE back to dev->attrs.max_sge_rd for iWARP.
> 
> Changes compared to v1:
> * max_send_sge is now stored in struct ib_qp. This greatly simplifies
>    this patch series.
> * An unneeded initialization that I had added to rdma_rw_init_one_mr()
>    has been left out again.
> * Corrected "Fixes" tag in the patch description where needed.
> 
> The individual patches in this series are:
> 
> 0001-IB-core-Make-rdma_rw_ctx_init-initialize-all-used-fi.patch
> 0002-IB-core-RDMA-RW-API-Do-not-exceed-QP-SGE-send-limit.patch
> 0003-IB-srpt-Limit-the-number-of-SG-elements-per-work-req.patch
> 0004-IB-srpt-Simplify-srpt_queue_response.patch
> 0005-IB-isert-Remove-an-unused-member-variable.patch
> 
> Thanks,
> 
> Bart.
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Will pull and test these ASAP.

Thanks
Laurence
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