netdev - Re: [PATCH bpf-next v4 3/8] i40e: add support for AF_XDP need

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Message-ID: <DA842C18-42DF-4559-A746-F0B428B3CAB5@gmail.com>
Date:   Wed, 14 Aug 2019 08:41:29 -0700
From:   "Jonathan Lemon" <jonathan.lemon@...il.com>
To:     "Magnus Karlsson" <magnus.karlsson@...el.com>
Cc:     bjorn.topel@...el.com, ast@...nel.org, daniel@...earbox.net,
        netdev@...r.kernel.org, brouer@...hat.com, maximmi@...lanox.com,
        bpf@...r.kernel.org, bruce.richardson@...el.com,
        ciara.loftus@...el.com, jakub.kicinski@...ronome.com,
        xiaolong.ye@...el.com, qi.z.zhang@...el.com,
        sridhar.samudrala@...el.com, kevin.laatz@...el.com,
        ilias.apalodimas@...aro.org, kiran.patil@...el.com,
        axboe@...nel.dk, maciej.fijalkowski@...el.com,
        maciejromanfijalkowski@...il.com, intel-wired-lan@...ts.osuosl.org
Subject: Re: [PATCH bpf-next v4 3/8] i40e: add support for AF_XDP need_wakeup
 feature

On 14 Aug 2019, at 0:27, Magnus Karlsson wrote:

> This patch adds support for the need_wakeup feature of AF_XDP. If the
> application has told the kernel that it might sleep using the new bind
> flag XDP_USE_NEED_WAKEUP, the driver will then set this flag if it has
> no more buffers on the NIC Rx ring and yield to the application. For
> Tx, it will set the flag if it has no outstanding Tx completion
> interrupts and return to the application.
>
> Signed-off-by: Magnus Karlsson <magnus.karlsson@...el.com>

Acked-by: Jonathan Lemon <jonathan.lemon@...il.com>