From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: <dev-bounces@dpdk.org> Received: from dpdk.org (dpdk.org [92.243.14.124]) by inbox.dpdk.org (Postfix) with ESMTP id 0FCB0A052A; Mon, 3 Aug 2020 16:34:14 +0200 (CEST) Received: from [92.243.14.124] (localhost [127.0.0.1]) by dpdk.org (Postfix) with ESMTP id 40BD42BE6; Mon, 3 Aug 2020 16:34:13 +0200 (CEST) Received: from dispatch1-us1.ppe-hosted.com (dispatch1-us1.ppe-hosted.com [67.231.154.164]) by dpdk.org (Postfix) with ESMTP id 93FA12BE1 for <dev@dpdk.org>; Mon, 3 Aug 2020 16:34:11 +0200 (CEST) Received: from mx1-us1.ppe-hosted.com (unknown [10.110.50.144]) by dispatch1-us1.ppe-hosted.com (PPE Hosted ESMTP Server) with ESMTP id 3EA1C2005F; Mon, 3 Aug 2020 14:34:11 +0000 (UTC) Received: from us4-mdac16-22.at1.mdlocal (unknown [10.110.49.204]) by mx1-us1.ppe-hosted.com (PPE Hosted ESMTP Server) with ESMTP id 3CACD800A4; Mon, 3 Aug 2020 14:34:11 +0000 (UTC) X-Virus-Scanned: Proofpoint Essentials engine Received: from mx1-us1.ppe-hosted.com (unknown [10.110.49.107]) by mx1-us1.ppe-hosted.com (PPE Hosted ESMTP Server) with ESMTPS id 98DC24007A; Mon, 3 Aug 2020 14:34:10 +0000 (UTC) Received: from webmail.solarflare.com (uk.solarflare.com [193.34.186.16]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-SHA384 (256/256 bits)) (No client certificate requested) by mx1-us1.ppe-hosted.com (PPE Hosted ESMTP Server) with ESMTPS id 4929D28005C; Mon, 3 Aug 2020 14:34:10 +0000 (UTC) Received: from [192.168.38.17] (10.17.10.39) by ukex01.SolarFlarecom.com (10.17.10.4) with Microsoft SMTP Server (TLS) id 15.0.1497.2; Mon, 3 Aug 2020 15:34:05 +0100 To: Ori Kam <orika@mellanox.com>, <thomas@monjalon.net>, John McNamara <john.mcnamara@intel.com>, Marko Kovacevic <marko.kovacevic@intel.com> CC: <dev@dpdk.org> References: <1596464905-43867-1-git-send-email-orika@mellanox.com> From: Andrew Rybchenko <arybchenko@solarflare.com> Autocrypt: addr=arybchenko@solarflare.com; keydata= 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X-ClientProxiedBy: ocex03.SolarFlarecom.com (10.20.40.36) To ukex01.SolarFlarecom.com (10.17.10.4) X-TM-AS-Product-Ver: SMEX-12.5.0.1300-8.6.1012-25580.005 X-TM-AS-Result: No-15.437200-8.000000-10 X-TMASE-MatchedRID: 8+bhjh9TQnEeimh1YYHcKPZvT2zYoYOwC/ExpXrHizweeOmdPBXZbhX0 C/Gbw7Ij2Vt6jneXAxGgihKUOJd73go28QW8mesc1uDM+OtX7Bw0AJe3B5qfBgCOLD+ckgKHW5b BKjPYdXK7VoNmAnN570AFcnpD9mZeI9uvmW7ehh6a+cpJvTbSHKCAPRBOSGO0HDQcqEqNN+mAec OigRAltRKirpSv+djUj0IvV7jlqDhLiq8fPT8HyWpjhlm7EiBXb1d/zpzApVqrGGfEwKMDIicN/ 7nuYGKBIycykIRMn0dwo+aTu/CBwOYlblXJFLruRRDrDHhyfDe3xwqfnvnKHoB4XybRlTmE5QQK f2safFDi8zVgXoAltkWL4rBlm20vt7DW3B48kkHdB/CxWTRRu25FeHtsUoHuY3mtkcCetvpj49Y RS7zVHGuQQiV9eyaGMu3FpREWVqaUTGVAhB5EbQ== X-TM-AS-User-Approved-Sender: Yes X-TM-AS-User-Blocked-Sender: No X-TMASE-Result: 10--15.437200-8.000000 X-TMASE-Version: SMEX-12.5.0.1300-8.6.1012-25580.005 X-MDID: 1596465251-siwQ7iHKUzVK Subject: Re: [dpdk-dev] [PATCH] doc: update RSS action with best effort X-BeenThere: dev@dpdk.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: DPDK patches and discussions <dev.dpdk.org> List-Unsubscribe: <https://mails.dpdk.org/options/dev>, <mailto:dev-request@dpdk.org?subject=unsubscribe> List-Archive: <http://mails.dpdk.org/archives/dev/> List-Post: <mailto:dev@dpdk.org> List-Help: <mailto:dev-request@dpdk.org?subject=help> List-Subscribe: <https://mails.dpdk.org/listinfo/dev>, <mailto:dev-request@dpdk.org?subject=subscribe> Errors-To: dev-bounces@dpdk.org Sender: "dev" <dev-bounces@dpdk.org> On 8/3/20 5:28 PM, Ori Kam wrote: > Using the rte_flow action RSS types field, > may result in an undefined outcome. > > For example selecting both UDP and TCP, > selecting TCP RSS type but the pattern is targeting UDP traffic. > another option is that the PMD doesn't support all requested types. > > Until now, it wasn't clear what will happen in such cases. > This commit clarify this issue by stating that the PMD > will work in the best-effort mode. > > Signed-off-by: Ori Kam <orika@mellanox.com> > --- > doc/guides/prog_guide/rte_flow.rst | 10 ++++++++++ > 1 file changed, 10 insertions(+) > > diff --git a/doc/guides/prog_guide/rte_flow.rst b/doc/guides/prog_guide/rte_flow.rst > index 3e5cd1e..d000560 100644 > --- a/doc/guides/prog_guide/rte_flow.rst > +++ b/doc/guides/prog_guide/rte_flow.rst > @@ -1735,6 +1735,16 @@ unspecified "best-effort" settings from the underlying PMD, which depending > on the flow rule, may result in anything ranging from empty (single queue) > to all-inclusive RSS. > > +Best effort will be used, in case there is a conflict inside the rule. > +The conflict can be the result of: > + > +- Conflicting RSS types, for example setting both UDP and TCP. > + > +- Conflicting between RSS types and the requested pattern to match, > + for example matching on UDP and hashing RSS on TCP. IMHO it is not a problem at all, but good to clarify anyway. > + > +- Hashing on types that are not supported by the PMD. Shouldn't it return error to the caller? > + > Note: RSS hash result is stored in the ``hash.rss`` mbuf field which > overlaps ``hash.fdir.lo``. Since `Action: MARK`_ sets the ``hash.fdir.hi`` > field only, both can be requested simultaneously. >