netdev - Re: [PATCH net-next] sfc: reduce the number of requested xdp ev queues

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Message-ID: <20201217101441.3d5085f3@kicinski-fedora-pc1c0hjn.dhcp.thefacebook.com>
Date:   Thu, 17 Dec 2020 10:14:41 -0800
From:   Jakub Kicinski <kuba@...nel.org>
To:     Ivan Babrou <ivan@...udflare.com>
Cc:     netdev@...r.kernel.org, linux-kernel@...r.kernel.org,
        bpf@...r.kernel.org, kernel-team@...udflare.com,
        Edward Cree <ecree.xilinx@...il.com>,
        Martin Habets <habetsm.xilinx@...il.com>,
        "David S. Miller" <davem@...emloft.net>,
        Alexei Starovoitov <ast@...nel.org>,
        Daniel Borkmann <daniel@...earbox.net>,
        Jesper Dangaard Brouer <hawk@...nel.org>,
        John Fastabend <john.fastabend@...il.com>
Subject: Re: [PATCH net-next] sfc: reduce the number of requested xdp ev
 queues

On Mon, 14 Dec 2020 17:29:06 -0800 Ivan Babrou wrote:
> Without this change the driver tries to allocate too many queues,
> breaching the number of available msi-x interrupts on machines
> with many logical cpus and default adapter settings:
> 
> Insufficient resources for 12 XDP event queues (24 other channels, max 32)
> 
> Which in turn triggers EINVAL on XDP processing:
> 
> sfc 0000:86:00.0 ext0: XDP TX failed (-22)
> 
> Signed-off-by: Ivan Babrou <ivan@...udflare.com>

Looks like the discussion may have concluded, but we don't take -next
patches during the merge window, so please repost when net-next reopens.

Thanks!
--
# Form letter - net-next is closed

We have already sent the networking pull request for 5.11 and therefore
net-next is closed for new drivers, features, code refactoring and
optimizations. We are currently accepting bug fixes only.

Please repost when net-next reopens after 5.11-rc1 is cut.

Look out for the announcement on the mailing list or check:
http://vger.kernel.org/~davem/net-next.html

RFC patches sent for review only are obviously welcome at any time.