From: Jakub Kicinski <kuba@kernel•org>
To: Taehee Yoo <ap420073@gmail•com>
Cc: davem@davemloft•net, pabeni@redhat•com, edumazet@google•com,
almasrymina@google•com, donald.hunter@gmail•com, corbet@lwn•net,
michael.chan@broadcom•com, andrew+netdev@lunn•ch,
hawk@kernel•org, ilias.apalodimas@linaro•org, ast@kernel•org,
daniel@iogearbox•net, john.fastabend@gmail•com, dw@davidwei•uk,
sdf@fomichev•me, asml.silence@gmail•com, brett.creeley@amd•com,
linux-doc@vger•kernel.org, netdev@vger•kernel.org,
kory.maincent@bootlin•com, maxime.chevallier@bootlin•com,
danieller@nvidia•com, hengqi@linux•alibaba.com,
ecree.xilinx@gmail•com, przemyslaw.kitszel@intel•com,
hkallweit1@gmail•com, ahmed.zaki@intel•com,
rrameshbabu@nvidia•com, idosch@nvidia•com, jiri@resnulli•us,
bigeasy@linutronix•de, lorenzo@kernel•org, jdamato@fastly•com,
aleksander.lobakin@intel•com, kaiyuanz@google•com,
willemb@google•com, daniel.zahka@gmail•com
Subject: Re: [PATCH net-next v6 2/9] net: ethtool: add hds_config member in ethtool_netdev_state
Date: Wed, 18 Dec 2024 18:16:01 -0800 [thread overview]
Message-ID: <20241218181601.4c3c29f7@kernel.org> (raw)
In-Reply-To: <20241218144530.2963326-3-ap420073@gmail.com>
On Wed, 18 Dec 2024 14:45:23 +0000 Taehee Yoo wrote:
> When tcp-data-split is UNKNOWN mode, drivers arbitrarily handle it.
> For example, bnxt_en driver automatically enables if at least one of
> LRO/GRO/JUMBO is enabled.
> If tcp-data-split is UNKNOWN and LRO is enabled, a driver returns
> ENABLES of tcp-data-split, not UNKNOWN.
> So, `ethtool -g eth0` shows tcp-data-split is enabled.
>
> The problem is in the setting situation.
> In the ethnl_set_rings(), it first calls get_ringparam() to get the
> current driver's config.
> At that moment, if driver's tcp-data-split config is UNKNOWN, it returns
> ENABLE if LRO/GRO/JUMBO is enabled.
> Then, it sets values from the user and driver's current config to
> kernel_ethtool_ringparam.
> Last it calls .set_ringparam().
> The driver, especially bnxt_en driver receives
> ETHTOOL_TCP_DATA_SPLIT_ENABLED.
> But it can't distinguish whether it is set by the user or just the
> current config.
>
> When user updates ring parameter, the new hds_config value is updated
> and current hds_config value is stored to old_hdsconfig.
> Driver's .set_ringparam() callback can distinguish a passed
> tcp-data-split value is came from user explicitly.
> If .set_ringparam() is failed, hds_config is rollbacked immediately.
>
> Suggested-by: Jakub Kicinski <kuba@kernel•org>
> Signed-off-by: Taehee Yoo <ap420073@gmail•com>
Reviewed-by: Jakub Kicinski <kuba@kernel•org>
next prev parent reply other threads:[~2024-12-19 2:16 UTC|newest]
Thread overview: 34+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-12-18 14:45 [PATCH net-next v6 0/9] bnxt_en: implement tcp-data-split and thresh option Taehee Yoo
2024-12-18 14:45 ` [PATCH net-next v6 1/9] bnxt_en: add support for rx-copybreak ethtool command Taehee Yoo
2024-12-19 2:07 ` Jakub Kicinski
2024-12-19 13:24 ` Taehee Yoo
2024-12-18 14:45 ` [PATCH net-next v6 2/9] net: ethtool: add hds_config member in ethtool_netdev_state Taehee Yoo
2024-12-19 2:16 ` Jakub Kicinski [this message]
2024-12-18 14:45 ` [PATCH net-next v6 3/9] bnxt_en: add support for tcp-data-split ethtool command Taehee Yoo
2024-12-19 2:25 ` Jakub Kicinski
2024-12-19 2:41 ` Jakub Kicinski
2024-12-19 14:05 ` Taehee Yoo
2024-12-19 14:29 ` Jakub Kicinski
2024-12-19 15:14 ` Taehee Yoo
2024-12-19 15:25 ` Jakub Kicinski
2024-12-19 19:33 ` Andy Gospodarek
2024-12-19 20:18 ` Jakub Kicinski
2024-12-19 23:41 ` Michael Chan
2024-12-20 2:08 ` Jakub Kicinski
2024-12-18 14:45 ` [PATCH net-next v6 4/9] net: ethtool: add support for configuring hds-thresh Taehee Yoo
2024-12-19 2:35 ` Jakub Kicinski
2024-12-19 14:10 ` Taehee Yoo
2024-12-18 14:45 ` [PATCH net-next v6 5/9] bnxt_en: add support for hds-thresh ethtool command Taehee Yoo
2024-12-19 2:40 ` Jakub Kicinski
2024-12-19 14:12 ` Taehee Yoo
2024-12-18 14:45 ` [PATCH net-next v6 6/9] net: devmem: add ring parameter filtering Taehee Yoo
2024-12-18 14:45 ` [PATCH net-next v6 7/9] net: ethtool: " Taehee Yoo
2024-12-18 14:45 ` [PATCH net-next v6 8/9] net: disallow setup single buffer XDP when tcp-data-split is enabled Taehee Yoo
2024-12-19 2:44 ` Jakub Kicinski
2024-12-19 14:14 ` Taehee Yoo
2024-12-18 14:45 ` [PATCH net-next v6 9/9] netdevsim: add HDS feature Taehee Yoo
2024-12-19 2:49 ` Jakub Kicinski
2024-12-19 14:37 ` Taehee Yoo
2024-12-19 14:45 ` Jakub Kicinski
2024-12-19 15:19 ` Taehee Yoo
2024-12-19 15:28 ` Jakub Kicinski
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