From: "Björn Töpel" <bjorn.topel@intel.com>
To: Jesper Dangaard Brouer <brouer@redhat.com>,
Toshiaki Makita <makita.toshiaki@lab.ntt.co.jp>
Cc: "Alexei Starovoitov" <ast@kernel.org>,
"Daniel Borkmann" <daniel@iogearbox.net>,
netdev@vger.kernel.org,
"Jakub Kicinski" <jakub.kicinski@netronome.com>,
"John Fastabend" <john.fastabend@gmail.com>,
"Tariq Toukan" <tariqt@mellanox.com>,
"Björn Töpel" <bjorn.topel@gmail.com>,
intel-wired-lan@lists.osuosl.org
Subject: Re: [PATCH v8 bpf-next 00/10] veth: Driver XDP
Date: Mon, 6 Aug 2018 10:22:10 +0200 [thread overview]
Message-ID: <82583528-9c49-5db8-db11-04d501ca0bfc@intel.com> (raw)
In-Reply-To: <20180803114538.382664c8@redhat.com>
On 2018-08-03 11:45, Jesper Dangaard Brouer wrote:
> On Fri, 3 Aug 2018 16:58:08 +0900
> Toshiaki Makita <makita.toshiaki@lab.ntt.co.jp> wrote:
>
>> This patch set introduces driver XDP for veth.
>> Basically this is used in conjunction with redirect action of another XDP
>> program.
>>
>> NIC -----------> veth===veth
>> (XDP) (redirect) (XDP)
>>
>
> I'm was playing with V7 on my testlab yesterday and I noticed one
> fundamental issue. You are not updating the "ifconfig" stats counters,
> when in XDP mode. This makes receive or send via XDP invisible to
> sysadm/management tools. This for-sure is going to cause confusion...
>
> I took a closer look at other driver. The ixgbe driver is doing the
> right thing. Driver i40e have a bug, where RX/TX stats are swapped
> getting (strange!).
Indeed! Thanks for finding/reporting this! I'll have look!
Björn
> The mlx5 driver is not updating the regular RX/TX
> counters, but A LOT of other ethtool stats counters (which are the ones
> I usually monitor when testing).
>
> So, given other drivers also didn't get this right, we need to have a
> discussion outside your/this patchset. Thus, I don't want to
> stop/stall this patchset, but this is something we need to fixup in a
> followup patchset to other drivers as well.
>
> Thus, I'm acking the patchset, but I request that we do a joint effort
> of fixing this as followup patches.
>
> Acked-by: Jesper Dangaard Brouer <brouer@redhat.com>
>
next prev parent reply other threads:[~2018-08-06 10:32 UTC|newest]
Thread overview: 19+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-08-03 7:58 [PATCH v8 bpf-next 00/10] veth: Driver XDP Toshiaki Makita
2018-08-03 7:58 ` [PATCH v8 bpf-next 01/10] net: Export skb_headers_offset_update Toshiaki Makita
2018-08-03 7:58 ` [PATCH v8 bpf-next 02/10] veth: Add driver XDP Toshiaki Makita
2018-08-07 14:26 ` Daniel Borkmann
2018-08-08 0:53 ` Toshiaki Makita
2018-08-03 7:58 ` [PATCH v8 bpf-next 03/10] veth: Avoid drops by oversized packets when XDP is enabled Toshiaki Makita
2018-08-03 7:58 ` [PATCH v8 bpf-next 04/10] xdp: Helper function to clear kernel pointers in xdp_frame Toshiaki Makita
2018-08-03 9:06 ` Jesper Dangaard Brouer
2018-08-03 7:58 ` [PATCH v8 bpf-next 05/10] veth: Handle xdp_frames in xdp napi ring Toshiaki Makita
2018-08-03 9:07 ` Jesper Dangaard Brouer
2018-08-03 7:58 ` [PATCH v8 bpf-next 06/10] veth: Add ndo_xdp_xmit Toshiaki Makita
2018-08-03 7:58 ` [PATCH v8 bpf-next 07/10] bpf: Make redirect_info accessible from modules Toshiaki Makita
2018-08-03 7:58 ` [PATCH v8 bpf-next 08/10] xdp: Helpers for disabling napi_direct of xdp_return_frame Toshiaki Makita
2018-08-03 7:58 ` [PATCH v8 bpf-next 09/10] veth: Add XDP TX and REDIRECT Toshiaki Makita
2018-08-03 7:58 ` [PATCH v8 bpf-next 10/10] veth: Support per queue XDP ring Toshiaki Makita
2018-08-03 9:45 ` [PATCH v8 bpf-next 00/10] veth: Driver XDP Jesper Dangaard Brouer
2018-08-03 11:14 ` Toshiaki Makita
2018-08-06 8:22 ` Björn Töpel [this message]
2018-08-10 14:24 ` Daniel Borkmann
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