netdev - Re: [rdma-rc PATCH 2/2] iw_cxgb4: cq/qp mask depends on bar2 pages in a host page

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Date:   Thu, 14 Feb 2019 15:41:34 +0000
From:   Jason Gunthorpe <jgg@...lanox.com>
To:     Raju Rangoju <rajur@...lsio.com>
CC:     "davem@...emloft.net" <davem@...emloft.net>,
        "linux-rdma@...r.kernel.org" <linux-rdma@...r.kernel.org>,
        "netdev@...r.kernel.org" <netdev@...r.kernel.org>,
        "swise@...ngridcomputing.com" <swise@...ngridcomputing.com>
Subject: Re: [rdma-rc PATCH 2/2] iw_cxgb4: cq/qp mask depends on bar2 pages in
 a host page

On Thu, Feb 14, 2019 at 05:40:54PM +0530, Raju Rangoju wrote:
> Adjust the cq/qp mask based on no.of bar2 pages in a host page.
> 
> For user-mode rdma, the granularity of the BAR2 memory mapped
> to a user rdma process during queue allocation must be based
> on the host page size. The lld attributes udb_density and
> ucq_density are used to figure out how many sge contexts are
> in a bar2 page. So the rdev->qpmask and rdev->cqmask in
> iw_cxgb4 need to now be adjusted based on how many sge bar2
> pages are in a host page.

Why is this rc? Do certain arches fail to work or something?

Jason