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

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Date:   Tue, 19 Jan 2021 15:43:43 -0800
From:   Ivan Babrou <ivan@...udflare.com>
To:     Jakub Kicinski <kuba@...nel.org>
Cc:     Linux Kernel Network Developers <netdev@...r.kernel.org>,
        linux-kernel <linux-kernel@...r.kernel.org>, bpf@...r.kernel.org,
        kernel-team <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 Thu, Dec 17, 2020 at 10:14 AM Jakub Kicinski <kuba@...nel.org> wrote:
>
> 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.

Should I resend my patch now that the window is open or is bumping
this thread enough?

> 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.