netdev - Re: [PATCH rfc 0/6] Automatic affinity settings for nvme over rdma

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Date:   Mon, 10 Apr 2017 13:05:50 -0500
From:   Steve Wise <swise@...ngridcomputing.com>
To:     Sagi Grimberg <sagi@...mberg.me>, linux-rdma@...r.kernel.org,
        linux-nvme@...ts.infradead.org, linux-block@...r.kernel.org
Cc:     netdev@...r.kernel.org, Saeed Mahameed <saeedm@...lanox.com>,
        Or Gerlitz <ogerlitz@...lanox.com>,
        Christoph Hellwig <hch@....de>
Subject: Re: [PATCH rfc 0/6] Automatic affinity settings for nvme over rdma

On 4/2/2017 8:41 AM, Sagi Grimberg wrote:
> This patch set is aiming to automatically find the optimal
> queue <-> irq multi-queue assignments in storage ULPs (demonstrated
> on nvme-rdma) based on the underlying rdma device irq affinity
> settings.
>
> First two patches modify mlx5 core driver to use generic API
> to allocate array of irq vectors with automatic affinity
> settings instead of open-coding exactly what it does (and
> slightly worse).
>
> Then, in order to obtain an affinity map for a given completion
> vector, we expose a new RDMA core API, and implement it in mlx5.
>
> The third part is addition of a rdma-based queue mapping helper
> to blk-mq that maps the tagset hctx's according to the device
> affinity mappings.
>
> I'd happily convert some more drivers, but I'll need volunteers
> to test as I don't have access to any other devices.

I'll test cxgb4 if you convert it. :)