From: Thomas Graf <tgraf@suug.ch>
To: Tom Herbert <therbert@google.com>
Cc: Alexei Starovoitov <alexei.starovoitov@gmail.com>,
Jiri Pirko <jiri@resnulli.us>,
John Fastabend <john.r.fastabend@intel.com>,
Jamal Hadi Salim <jhs@mojatatu.com>,
"netdev@vger.kernel.org" <netdev@vger.kernel.org>,
"David S. Miller" <davem@davemloft.net>,
Neil Horman <nhorman@tuxdriver.com>,
Andy Gospodarek <andy@greyhouse.net>,
Daniel Borkmann <dborkman@redhat.com>,
Or Gerlitz <ogerlitz@mellanox.com>,
Jesse Gross <jesse@nicira.com>,
Pravin Shelar <pshelar@nicira.com>, Andy Zhou <azhou@nicira.com>,
Ben Hutchings <ben@decadent.org.uk>,
Stephen Hemminger <stephen@networkplumber.org>,
Jeff Kirsher <jeffrey.t.kirsher@intel.com>,
Vladislav Yasevich <vyasevic@redhat.com>,
Cong Wang <xiyou.wangcong@gmail.com>,
Eric Dumazet <edumazet@google.com>,
Scott Feldman <sfeldma@cumulusnetworks.com>,
Florian Fainelli <f.fainelli@gmail.com>,
Roopa Prabhu <roopa@cumulusnetworks.com>
Subject: Re: [patch net-next v2 8/9] switchdev: introduce Netlink API
Date: Tue, 23 Sep 2014 10:52:05 +0100 [thread overview]
Message-ID: <20140923095205.GC6944@casper.infradead.org> (raw)
In-Reply-To: <CA+mtBx-mJE6SW2bqf3_t6iu=o5FY1WAF1ByeZpDJnc+6fpK6nA@mail.gmail.com>
On 09/22/14 at 07:16pm, Tom Herbert wrote:
> Turn on UDP RSS on the device and I bet you'll see those differences
> go away! Once we moved to UDP encapsulation, there's really little
> value in looking at inner headers for RSS or ECMP, this should be
> sufficient. Sure someone might want to parse the inner headers for
> some sort of advanced RX steering, but again this implies rx-filtering
> and not switch functionality.
Agreed. The reason we discuss this in the context of this thread is
because the required rx-filtering capabilities seem to be introduced
in the form of (adapted) switch chip integrations onto NICs. In that
sense, OVS is essentially doing advanced RX steering in software.
I agree that switch functionality (whatever that specifically implies)
is not strictly required for the host if you consider queue
redirection as part of RX steering. The exception here would be use
of SR-IOV which could be highly interesting for corner cases if
combined with smart elephant guest detection. A classic example would
be NFV deployed in a virtualized environment, i.e. a virtual firewall
or DPI application serving a bunch of guests.
> If this is something that doesn't require any model change to the
> stack and is just a clever backend for rx-filters or tc, then I'm fine
> with that!
I haven't seen any model change proposed. I'm most certainly not
advocating that. Anyone who can live a model change might as well
just stick to SnabbSwitch or DPDK.
next prev parent reply other threads:[~2014-09-23 9:52 UTC|newest]
Thread overview: 67+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-09-19 13:49 [patch net-next v2 0/9] introduce rocker switch driver with hardware accelerated datapath api Jiri Pirko
2014-09-19 13:49 ` [patch net-next v2 1/9] net: rename netdev_phys_port_id to more generic name Jiri Pirko
[not found] ` <1411134590-4586-2-git-send-email-jiri-rHqAuBHg3fBzbRFIqnYvSA@public.gmane.org>
2014-09-19 13:54 ` Jeff Kirsher
2014-09-19 13:49 ` [patch net-next v2 3/9] rtnl: expose physical switch id for particular device Jiri Pirko
2014-09-19 13:49 ` [patch net-next v2 4/9] net-sysfs: " Jiri Pirko
2014-09-19 13:49 ` [patch net-next v2 5/9] net: introduce dummy switch Jiri Pirko
[not found] ` <1411134590-4586-6-git-send-email-jiri-rHqAuBHg3fBzbRFIqnYvSA@public.gmane.org>
2014-09-20 5:21 ` Florian Fainelli
2014-09-20 7:37 ` Jiri Pirko
2014-09-19 13:49 ` [patch net-next v2 6/9] switchdev: add basic support for flow matching and actions Jiri Pirko
2014-09-20 5:32 ` Florian Fainelli
2014-09-20 7:28 ` Jiri Pirko
2014-09-19 13:49 ` [patch net-next v2 7/9] switchdev: add swdev features Jiri Pirko
2014-09-19 13:49 ` [patch net-next v2 8/9] switchdev: introduce Netlink API Jiri Pirko
2014-09-19 15:25 ` Jamal Hadi Salim
2014-09-19 15:49 ` Jiri Pirko
2014-09-19 17:57 ` Jamal Hadi Salim
2014-09-19 22:12 ` John Fastabend
2014-09-19 22:18 ` Jamal Hadi Salim
2014-09-20 5:39 ` Florian Fainelli
2014-09-20 8:25 ` Jiri Pirko
2014-09-20 8:17 ` Jiri Pirko
2014-09-20 10:19 ` Jamal Hadi Salim
2014-09-20 11:01 ` Thomas Graf
2014-09-20 11:32 ` Jamal Hadi Salim
2014-09-20 11:51 ` Thomas Graf
[not found] ` <20140920115140.GA3777-FZi0V3Vbi30CUdFEqe4BF2D2FQJk+8+b@public.gmane.org>
2014-09-20 12:35 ` Jamal Hadi Salim
2014-09-22 7:53 ` Jiri Pirko
[not found] ` <20140922075337.GA1828-6KJVSR23iU488b5SBfVpbw@public.gmane.org>
2014-09-22 11:48 ` Jamal Hadi Salim
2014-09-20 5:36 ` Florian Fainelli
2014-09-20 8:14 ` Jiri Pirko
2014-09-20 10:53 ` Thomas Graf
2014-09-20 22:50 ` Alexei Starovoitov
2014-09-22 8:13 ` Thomas Graf
2014-09-22 15:10 ` Tom Herbert
2014-09-22 22:17 ` Thomas Graf
[not found] ` <20140922221727.GA4708-FZi0V3Vbi30CUdFEqe4BF2D2FQJk+8+b@public.gmane.org>
2014-09-22 22:40 ` Tom Herbert
2014-09-22 22:53 ` Thomas Graf
2014-09-22 23:07 ` Tom Herbert
2014-09-23 1:36 ` John Fastabend
2014-09-23 7:19 ` Thomas Graf
2014-09-23 11:09 ` Jamal Hadi Salim
[not found] ` <CA+mtBx9ZVQ5r5Hzy9-uEnk+iu+HKkOP4+VANC06Xf8VvTxktwQ-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2014-09-23 9:18 ` Thomas Graf
2014-09-23 1:54 ` Alexei Starovoitov
2014-09-23 2:16 ` Tom Herbert
2014-09-23 4:11 ` Andy Gospodarek
2014-09-23 10:11 ` Thomas Graf
2014-09-23 15:32 ` Or Gerlitz
2014-09-24 13:32 ` Thomas Graf
2014-09-26 20:03 ` Or Gerlitz
2014-09-26 21:02 ` Thomas Graf
2014-09-23 9:52 ` Thomas Graf [this message]
2014-09-20 3:41 ` Roopa Prabhu
2014-09-20 8:09 ` Jiri Pirko
2014-09-20 12:39 ` Roopa Prabhu
2014-09-20 8:10 ` Scott Feldman
2014-09-20 10:31 ` Jamal Hadi Salim
[not found] ` <DDC24110-C3F5-470F-B9BE-1D1792415D1E-qUQiAmfTcIp+XZJcv9eMoEEOCMrvLtNR@public.gmane.org>
2014-09-20 12:51 ` Roopa Prabhu
2014-09-20 17:21 ` Scott Feldman
2014-09-20 17:38 ` Jiri Pirko
2014-09-21 1:30 ` Roopa Prabhu
2014-09-19 13:49 ` [patch net-next v2 9/9] rocker: introduce rocker switch driver Jiri Pirko
[not found] ` <1411134590-4586-1-git-send-email-jiri-rHqAuBHg3fBzbRFIqnYvSA@public.gmane.org>
2014-09-19 13:49 ` [patch net-next v2 2/9] net: introduce generic switch devices support Jiri Pirko
2014-09-19 14:15 ` [patch net-next v2 0/9] introduce rocker switch driver with hardware accelerated datapath api David Laight
[not found] ` <063D6719AE5E284EB5DD2968C1650D6D17495CC6-VkEWCZq2GCInGFn1LkZF6NBPR1lH4CV8@public.gmane.org>
2014-09-19 14:20 ` Jiri Pirko
2014-09-20 5:37 ` Florian Fainelli
-- strict thread matches above, loose matches on Subject: below --
2014-09-23 3:43 [patch net-next v2 8/9] switchdev: introduce Netlink API Alexei Starovoitov
2014-09-23 20:57 ` Tom Herbert
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