From: Vladimir Oltean <vladimir.oltean@nxp.com>
To: Ferenc Fejes <fejes@inf.elte.hu>
Cc: netdev@vger.kernel.org, "David S. Miller" <davem@davemloft.net>,
Eric Dumazet <edumazet@google.com>,
Jakub Kicinski <kuba@kernel.org>, Paolo Abeni <pabeni@redhat.com>,
Claudiu Manoil <claudiu.manoil@nxp.com>,
Vinicius Costa Gomes <vinicius.gomes@intel.com>,
Kurt Kanzenbach <kurt@linutronix.de>,
Jacob Keller <jacob.e.keller@intel.com>,
Jamal Hadi Salim <jhs@mojatatu.com>,
Cong Wang <xiyou.wangcong@gmail.com>,
Jiri Pirko <jiri@resnulli.us>,
Simon Horman <simon.horman@corigine.com>
Subject: Re: [PATCH v6 net-next 02/13] net/sched: mqprio: refactor offloading and unoffloading to dedicated functions
Date: Thu, 16 Feb 2023 16:28:46 +0200 [thread overview]
Message-ID: <20230216142846.bjura4mf2f64tmcr@skbuf> (raw)
In-Reply-To: <ede5e9a2f27bf83bfb86d3e8c4ca7b34093b99e2.camel@inf.elte.hu>
Hi Ferenc,
On Thu, Feb 16, 2023 at 02:05:22PM +0100, Ferenc Fejes wrote:
> This patch just code refactoring or it modifies the default behavior of
> the offloading too? I'm asking it in regards of the veth interface.
> When you configure mqprio, the "hw" parameter is mandatory. By default,
> it tries to configure it with "hw 1". However as a result, veth spit
> back "Invalid argument" error (before your patches). Same happens after
> this patch too, right?
Yup. iproute2 has a default queue configuration built in, if nothing
else is specified, and this has "hw 1":
https://git.kernel.org/pub/scm/network/iproute2/iproute2.git/tree/tc/q_mqprio.c#n36
> For veth hardware offloading makes no sense, but giving the "hw 0"
> argument explicitly as mqprio parameter might counterintuitive.
Agree that giving the right nlattrs to mqprio and trying to slalom
through their validation is a frustrating minesweeper game. I have some
patches which add some netlink EXT_ACK messages to make this a bit less
sour. I'm regression-testing those, together with some other mqprio
changes and I hope to send them soon.
OTOH, "hw 1" is mandatory with the "mode", "shaper", "min_rate" and
"max_rate" options. This is logical when you think about it (driver has
to act upon them), but indeed it makes mqprio difficult to configure.
With veth, you need to use multi-queue to make use of mqprio/taprio,
have you done that?
ip link add veth0 numtxqueues 8 numrxqueues 8 type veth peer name veth1
next prev parent reply other threads:[~2023-02-16 14:28 UTC|newest]
Thread overview: 22+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-02-04 13:52 [PATCH v6 net-next 00/13] ENETC mqprio/taprio cleanup Vladimir Oltean
2023-02-04 13:52 ` [PATCH v6 net-next 01/13] net/sched: mqprio: refactor nlattr parsing to a separate function Vladimir Oltean
2023-02-04 13:52 ` [PATCH v6 net-next 02/13] net/sched: mqprio: refactor offloading and unoffloading to dedicated functions Vladimir Oltean
2023-02-16 13:05 ` Ferenc Fejes
2023-02-16 14:28 ` Vladimir Oltean [this message]
2023-02-16 14:41 ` Ferenc Fejes
2023-02-04 13:52 ` [PATCH v6 net-next 03/13] net/sched: move struct tc_mqprio_qopt_offload from pkt_cls.h to pkt_sched.h Vladimir Oltean
2023-02-04 13:52 ` [PATCH v6 net-next 04/13] net/sched: mqprio: allow reverse TC:TXQ mappings Vladimir Oltean
2023-02-05 12:42 ` Gerhard Engleder
2023-02-04 13:52 ` [PATCH v6 net-next 05/13] net/sched: mqprio: allow offloading drivers to request queue count validation Vladimir Oltean
2023-02-04 13:53 ` [PATCH v6 net-next 06/13] net/sched: mqprio: add extack messages for " Vladimir Oltean
2023-02-04 13:53 ` [PATCH v6 net-next 07/13] net/sched: taprio: centralize mqprio qopt validation Vladimir Oltean
2023-02-05 12:44 ` Gerhard Engleder
2023-02-04 13:53 ` [PATCH v6 net-next 08/13] net/sched: refactor mqprio qopt reconstruction to a library function Vladimir Oltean
2023-02-04 13:53 ` [PATCH v6 net-next 09/13] net/sched: taprio: pass mqprio queue configuration to ndo_setup_tc() Vladimir Oltean
2023-02-04 13:53 ` [PATCH v6 net-next 10/13] net/sched: taprio: only pass gate mask per TXQ for igc, stmmac, tsnep, am65_cpsw Vladimir Oltean
2023-02-04 13:53 ` [PATCH v6 net-next 11/13] net: enetc: request mqprio to validate the queue counts Vladimir Oltean
2023-02-04 13:53 ` [PATCH v6 net-next 12/13] net: enetc: act upon the requested mqprio queue configuration Vladimir Oltean
2023-02-04 13:53 ` [PATCH v6 net-next 13/13] net: enetc: act upon mqprio queue config in taprio offload Vladimir Oltean
2023-02-06 10:10 ` [PATCH v6 net-next 00/13] ENETC mqprio/taprio cleanup patchwork-bot+netdevbpf
2023-02-06 17:51 ` Jacob Keller
2023-02-07 12:48 ` Vladimir Oltean
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