linux-kernel - RE: [PATCH bpf-next 1/3] xsk: add launch time support to XDP Tx metadata

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Message-ID: <PH0PR11MB5830B462F82BFFE7E8958B64D887A@PH0PR11MB5830.namprd11.prod.outlook.com>
Date:   Sun, 3 Dec 2023 08:58:05 +0000
From:   "Song, Yoong Siang" <yoong.siang.song@...el.com>
To:     Jakub Kicinski <kuba@...nel.org>
CC:     "David S . Miller" <davem@...emloft.net>,
        Eric Dumazet <edumazet@...gle.com>,
        Paolo Abeni <pabeni@...hat.com>,
        Jonathan Corbet <corbet@....net>,
        Bjorn Topel <bjorn@...nel.org>,
        "Karlsson, Magnus" <magnus.karlsson@...el.com>,
        "Fijalkowski, Maciej" <maciej.fijalkowski@...el.com>,
        Jonathan Lemon <jonathan.lemon@...il.com>,
        Alexei Starovoitov <ast@...nel.org>,
        Daniel Borkmann <daniel@...earbox.net>,
        Jesper Dangaard Brouer <hawk@...nel.org>,
        John Fastabend <john.fastabend@...il.com>,
        Stanislav Fomichev <sdf@...gle.com>,
        "Lorenzo Bianconi" <lorenzo@...nel.org>,
        Tariq Toukan <tariqt@...dia.com>,
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        Maxime Coquelin <mcoquelin.stm32@...il.com>,
        Andrii Nakryiko <andrii@...nel.org>,
        Mykola Lysenko <mykolal@...com>,
        "Martin KaFai Lau" <martin.lau@...ux.dev>,
        Song Liu <song@...nel.org>,
        Yonghong Song <yonghong.song@...ux.dev>,
        KP Singh <kpsingh@...nel.org>, Hao Luo <haoluo@...gle.com>,
        Jiri Olsa <jolsa@...nel.org>, Shuah Khan <shuah@...nel.org>,
        Alexandre Torgue <alexandre.torgue@...s.st.com>,
        "Jose Abreu" <joabreu@...opsys.com>,
        "netdev@...r.kernel.org" <netdev@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "linux-doc@...r.kernel.org" <linux-doc@...r.kernel.org>,
        "bpf@...r.kernel.org" <bpf@...r.kernel.org>,
        "xdp-hints@...-project.net" <xdp-hints@...-project.net>,
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        <linux-stm32@...md-mailman.stormreply.com>,
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        <linux-arm-kernel@...ts.infradead.org>,
        "linux-kselftest@...r.kernel.org" <linux-kselftest@...r.kernel.org>
Subject: RE: [PATCH bpf-next 1/3] xsk: add launch time support to XDP Tx
 metadata

On Saturday, December 2, 2023 11:29 AM, Jakub Kicinski wrote:
>On Fri,  1 Dec 2023 00:20:26 +0800 Song Yoong Siang wrote:
>> +        name: launch-time
>> +        doc:
>> +          HW Time-Based Scheduling (TBS) is supported by the driver.
>
>Does this mean fifo "gating" or HW can do reordering?

Yes, HW will do reordering according to the value of launch time.