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From: "Ananyev, Konstantin" <konstantin.ananyev@intel.com>
To: "Yigit, Ferruh" <ferruh.yigit@intel.com>,
	Andrew Rybchenko <andrew.rybchenko@oktetlabs.ru>,
	"Yang, SteveX" <stevex.yang@intel.com>,
	"dev@dpdk.org" <dev@dpdk.org>
Cc: "Xing, Beilei" <beilei.xing@intel.com>,
	"Lu, Wenzhuo" <wenzhuo.lu@intel.com>,
	"Iremonger, Bernard" <bernard.iremonger@intel.com>,
	"Yang, Qiming" <qiming.yang@intel.com>,
	"mdr@ashroe.eu" <mdr@ashroe.eu>,
	"nhorman@tuxdriver.com" <nhorman@tuxdriver.com>
Subject: Re: [dpdk-dev] [PATCH v8 2/2] doc: annouce deprecation of jumbo frame flag condition
Date: Mon, 2 Nov 2020 16:05:14 +0000	[thread overview]
Message-ID: <BYAPR11MB3301BD2A8928143448DB45719A100@BYAPR11MB3301.namprd11.prod.outlook.com> (raw)
In-Reply-To: <8721bb8d-e361-f815-257f-08d531e23fba@intel.com>



> On 11/2/2020 1:18 PM, Andrew Rybchenko wrote:
> > On 11/2/20 11:52 AM, SteveX Yang wrote:
> >> Annouce to replace 'RTE_ETHER_MAX_LEN' with 'RTE_ETHER_MTU' as type
> >> condition of jumbo frame. Involved scopes:
> >> - rte_ethdev;
> >> - app, e.g.: test-pmd, test-eventdev;
> >> - examples, e.g.: ipsec-secgw, l3fwd, vhost;
> >> - net PMDs which support VLAN tag(s) within overhead, e.g.: i40e, ixgbe;
> >>
> >> Signed-off-by: SteveX Yang <stevex.yang@intel.com>
> >> ---
> >>   doc/guides/rel_notes/deprecation.rst | 12 ++++++++++++
> >>   1 file changed, 12 insertions(+)
> >>
> >> diff --git a/doc/guides/rel_notes/deprecation.rst
> >> b/doc/guides/rel_notes/deprecation.rst
> >> index 2e082499b..fae139f01 100644
> >> --- a/doc/guides/rel_notes/deprecation.rst
> >> +++ b/doc/guides/rel_notes/deprecation.rst
> >> @@ -138,6 +138,18 @@ Deprecation Notices
> >>     will be limited to maximum 256 queues.
> >>     Also compile time flag ``RTE_ETHDEV_QUEUE_STAT_CNTRS`` will be removed.
> >> +* ethdev: Offload flag ``DEV_RX_OFFLOAD_JUMBO_FRAME`` will be set according to
> >> +  ``RTE_ETHER_MTU`` in next release. Currently, the jumbo frame uses the
> >> +  ``RTE_ETHER_MAX_LEN`` as boundary condition. When the MTU (1500) set, the
> >> +  frame type of rx packet will be different if used different overhead, it will
> >> +  cause the consistency issue. Hence, using fixed value ``RTE_ETHER_MTU`` can
> >> +  avoid this issue.
> >> +  Following scopes will be changed:
> >> +  - ``rte_ethdev``
> >> +  - ``app``, e.g.: ``test-pmd``, ``test-eventdev``;
> >> +  - ``examples``, e.g.: ``ipsec-secgw``, ``l3fwd``, ``vhost``;
> >> +  - net PMDs which support VLAN tag(s) within overhead, e.g.: ``i40e``;
> >> +
> >>   * cryptodev: support for using IV with all sizes is added, J0 still can
> >>     be used but only when IV length in following structs
> >> ``rte_crypto_auth_xform``,
> >>     ``rte_crypto_aead_xform`` is set to zero. When IV length is greater or equal
> >>
> >
> > If so, what's the point to have the offload? May be just deprecate and
> > later remove it?
> >

Same thought actually, can we remove DEV_RX_OFFLOAD_JUMBO_FRAME flag completely?
PMD can decide based on provided MTU size does segmentation, etc. is needed.

> 
> Above just changes the condition of what is called jumbo frame, nothing more.
> 
> ethdev assumes max frame size (without jumbo frame support) can be
> 'RTE_ETHER_MAX_LEN' (1518)
> 
> But a PMD can support double VLAN, and it can have RTE_ETHER_MAX_LEN + 8 bytes
> frame size and still may not support jumbo frame.
> 
> In that case ethdev overwrites the frame size as RTE_ETHER_MAX_LEN, and this
> will reduce the supported MTU to 1492 (instead of expected 1500).
> Above deprecation notice is to fix this.

  reply	other threads:[~2020-11-02 16:05 UTC|newest]

Thread overview: 94+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-09-16  5:52 [dpdk-dev] [PATCH v1 0/5] fix default max mtu size when device configured SteveX Yang
2020-09-16  5:52 ` [dpdk-dev] [PATCH v1 1/5] net/e1000: fix max mtu size packets with vlan tag cannot be received by default SteveX Yang
2020-09-16  5:52 ` [dpdk-dev] [PATCH v1 2/5] net/igc: " SteveX Yang
2020-09-16  5:52 ` [dpdk-dev] [PATCH v1 3/5] net/ice: " SteveX Yang
2020-09-16  5:52 ` [dpdk-dev] [PATCH v1 4/5] net/iavf: " SteveX Yang
2020-09-16  5:52 ` [dpdk-dev] [PATCH v1 5/5] net/i40e: " SteveX Yang
2020-09-16 14:41   ` Ananyev, Konstantin
     [not found]     ` <DM6PR11MB4362E5FF332551D12AA20017F93E0@DM6PR11MB4362.namprd11.prod.outlook.com>
2020-09-17 12:18       ` Ananyev, Konstantin
2020-09-22  1:23 ` [dpdk-dev] [PATCH v2 0/5] fix default max mtu size when device configured SteveX Yang
2020-09-22  1:23   ` [dpdk-dev] [PATCH v2 1/5] net/e1000: fix max mtu size packets with vlan tag cannot be received by default SteveX Yang
2020-09-22  1:23   ` [dpdk-dev] [PATCH v2 2/5] net/igc: " SteveX Yang
2020-09-22  1:23   ` [dpdk-dev] [PATCH v2 3/5] net/ice: " SteveX Yang
2020-09-22  1:23   ` [dpdk-dev] [PATCH v2 4/5] net/i40e: " SteveX Yang
2020-09-22 10:47     ` Ananyev, Konstantin
2020-09-22  1:23   ` [dpdk-dev] [PATCH v2 5/5] net/iavf: " SteveX Yang
2020-09-23  4:09   ` [dpdk-dev] [PATCH v3 0/5] fix default max mtu size when device configured SteveX Yang
2020-09-23  4:09     ` [dpdk-dev] [PATCH v3 1/5] net/e1000: fix max mtu size packets with vlan tag cannot be received by default SteveX Yang
2020-09-23  4:09     ` [dpdk-dev] [PATCH v3 2/5] net/igc: " SteveX Yang
2020-09-23  4:09     ` [dpdk-dev] [PATCH v3 3/5] net/ice: " SteveX Yang
2020-09-23  4:09     ` [dpdk-dev] [PATCH v3 4/5] net/i40e: " SteveX Yang
2020-09-23  4:09     ` [dpdk-dev] [PATCH v3 5/5] net/iavf: " SteveX Yang
2020-09-28  6:55     ` [dpdk-dev] [PATCH v4 0/5] fix default max mtu size when device configured SteveX Yang
2020-09-28  6:55       ` [dpdk-dev] [PATCH v4 1/5] net/e1000: fix max mtu size packets with vlan tag cannot be received by default SteveX Yang
2020-09-28  6:55       ` [dpdk-dev] [PATCH v4 2/5] net/igc: " SteveX Yang
2020-09-28  6:55       ` [dpdk-dev] [PATCH v4 3/5] net/ice: " SteveX Yang
2020-09-29 11:59         ` Zhang, Qi Z
2020-09-29 23:01           ` Ananyev, Konstantin
2020-09-30  0:34             ` Zhang, Qi Z
     [not found]               ` <DM6PR11MB4362515283D00E27A793E6B0F9330@DM6PR11MB4362.namprd11.prod.outlook.com>
2020-09-30  2:32                 ` Zhang, Qi Z
2020-10-14 15:38                   ` Ferruh Yigit
     [not found]                     ` <DM6PR11MB43628BBF9DCE7CC4D7C05AD8F91E0@DM6PR11MB4362.namprd11.prod.outlook.com>
2020-10-19 10:49                       ` Ananyev, Konstantin
2020-10-19 13:07                         ` Ferruh Yigit
2020-10-19 14:07                           ` Ananyev, Konstantin
2020-10-19 14:28                             ` Ananyev, Konstantin
2020-10-19 18:01                               ` Ferruh Yigit
2020-10-20  9:07                                 ` Ananyev, Konstantin
2020-10-20 12:29                                   ` Ferruh Yigit
2020-10-21  9:47                                     ` Ananyev, Konstantin
2020-10-21 10:36                                       ` Ferruh Yigit
2020-10-21 10:44                                         ` Ananyev, Konstantin
2020-10-21 10:53                                           ` Ferruh Yigit
2020-10-19 18:05                       ` Ferruh Yigit
     [not found]                         ` <DM6PR11MB4362F936BFC715BF6BABBAD0F91F0@DM6PR11MB4362.namprd11.prod.outlook.com>
2020-10-20  8:13                           ` Ferruh Yigit
2020-09-28  6:55       ` [dpdk-dev] [PATCH v4 4/5] net/i40e: " SteveX Yang
2020-09-28  6:55       ` [dpdk-dev] [PATCH v4 5/5] net/iavf: " SteveX Yang
2020-10-14  9:19       ` [dpdk-dev] [PATCH v5 0/5] fix default max mtu size when device configured SteveX Yang
2020-10-14  9:19         ` [dpdk-dev] [PATCH v5 1/5] net/e1000: fix max mtu size packets with vlan tag cannot be received by default SteveX Yang
2020-10-14  9:19         ` [dpdk-dev] [PATCH v5 2/5] net/igc: " SteveX Yang
2020-10-14  9:19         ` [dpdk-dev] [PATCH v5 3/5] net/ice: " SteveX Yang
2020-10-14 11:35           ` Zhang, Qi Z
2020-10-14  9:19         ` [dpdk-dev] [PATCH v5 4/5] net/i40e: " SteveX Yang
2020-10-14 10:30           ` Ananyev, Konstantin
2020-10-14  9:19         ` [dpdk-dev] [PATCH v5 5/5] net/iavf: " SteveX Yang
2020-10-14 11:43         ` [dpdk-dev] [PATCH v5 0/5] fix default max mtu size when device configured Zhang, Qi Z
2020-10-22  8:48         ` [dpdk-dev] [PATCH v6 0/2] " SteveX Yang
2020-10-22  8:48           ` [dpdk-dev] [PATCH v6 1/2] app/testpmd: fix max rx packet length for VLAN packets SteveX Yang
2020-10-22 16:22             ` Ferruh Yigit
2020-10-22  8:48           ` [dpdk-dev] [PATCH v6 2/2] librte_ethdev: fix MTU size exceeds max rx packet length SteveX Yang
2020-10-22 16:31             ` Ferruh Yigit
2020-10-22 16:52             ` Ananyev, Konstantin
2020-10-28  3:03           ` [dpdk-dev] [PATCH v7 0/1] fix default max mtu size when device configured SteveX Yang
2020-10-28  3:03             ` [dpdk-dev] [PATCH v7 1/1] app/testpmd: fix max rx packet length for VLAN packets SteveX Yang
2020-10-29  8:41               ` Ferruh Yigit
2020-11-02  8:52             ` [dpdk-dev] [PATCH v8 0/2] fix default max mtu size when device configured SteveX Yang
2020-11-02  8:52               ` [dpdk-dev] [PATCH v8 1/2] app/testpmd: fix max rx packet length for VLAN packets SteveX Yang
2020-11-02 11:48                 ` Ferruh Yigit
2020-11-03 13:29                   ` Ferruh Yigit
2020-11-04 16:51                     ` Thomas Monjalon
2020-11-04 17:07                       ` Ferruh Yigit
2020-11-04 17:55                         ` Thomas Monjalon
2020-11-04 20:19                           ` Ferruh Yigit
2020-11-04 20:39                             ` Thomas Monjalon
2020-11-05  8:54                               ` Andrew Rybchenko
     [not found]                                 ` <DM6PR11MB43622CC5DF485DD034037CD3F9EE0@DM6PR11MB4362.namprd11.prod.outlook.com>
2020-11-05 10:37                                   ` Ferruh Yigit
2020-11-05 10:44                                     ` Thomas Monjalon
2020-11-05 10:48                                       ` Thomas Monjalon
2020-11-05 10:50                                         ` Ferruh Yigit
2020-11-05 13:52                                           ` Olivier Matz
2020-11-05 15:11                                             ` Lance Richardson
2020-11-05 15:56                                               ` Ferruh Yigit
2020-11-05 16:23                                                 ` Lance Richardson
2020-11-05 17:44                                                 ` [dpdk-dev] [PATCH 1/1] app/testpmd: revert max Rx packet length adjustment Thomas Monjalon
2020-11-05 18:02                                                   ` Lance Richardson
2020-11-05 18:11                                                   ` Ferruh Yigit
2020-11-05 18:18                                                     ` Thomas Monjalon
2020-11-05 10:49                                       ` [dpdk-dev] [PATCH v8 1/2] app/testpmd: fix max rx packet length for VLAN packets Ferruh Yigit
2020-11-02  8:52               ` [dpdk-dev] [PATCH v8 2/2] doc: annouce deprecation of jumbo frame flag condition SteveX Yang
2020-11-02 11:50                 ` Ferruh Yigit
2020-11-02 13:18                 ` Andrew Rybchenko
2020-11-02 13:58                   ` Ferruh Yigit
2020-11-02 16:05                     ` Ananyev, Konstantin [this message]
     [not found]                       ` <DM6PR11MB43625C5CF594BEDC9CE479F7F9110@DM6PR11MB4362.namprd11.prod.outlook.com>
2020-11-24 17:46                         ` Ferruh Yigit
2020-11-27 12:19                           ` Andrew Rybchenko
2020-11-27 17:08                             ` Bruce Richardson

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