From: Vladimir Riabchun <vladimir.riabchun@virtuozzo.com>
To: Eva Kurchatova <eva.kurchatova@virtuozzo.com>
Cc: devel@openvz.org
Subject: Re: [Devel] [PATCH vz10 4/7] selftests: net: make the veth GRO checks independent of host tunnels
Date: Mon, 21 Sep 2026 14:51:47 +0000 [thread overview]
Message-ID: <179000230736.645403.14575711999525636303.b4-review@b4> (raw)
In-Reply-To: <20260831224850.1642265-4-eva.kurchatova@virtuozzo.com>
On Tue, 01 Sep 2026 01:48:22 +0300, Eva Kurchatova <eva.kurchatova@virtuozzo.com> wrote:
> Three aggregation checks report 10 packets where they want 1 on a host
> that has a vxlan, and pass on a host that does not. The kernel is doing
> what it is written to do.
>
> udp4_gro_receive() looks up the receiving socket only when
> udp_encap_needed_key is on, and that key is global: any UDP
> encapsulation socket on the machine, in any namespace, turns it on.
> udp_gro_receive() then aggregates for a packet that has no socket, or
> for a socket that asked for UDP GRO, and consults NETIF_F_GRO_UDP_FWD
> only in the first case. So with a vxlan somewhere on the box the lookup
> finds the test's own receiver, and rx-udp-gro-forwarding never gets a
> say.
>
> [...]
Reviewed-by: Vladimir Riabchun <vladimir.riabchun@virtuozzo.com>
--
Vladimir Riabchun <vladimir.riabchun@virtuozzo.com>
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next prev parent reply other threads:[~2026-09-21 14:53 UTC|newest]
Thread overview: 15+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-08-31 22:48 [Devel] [PATCH vz10 1/7] ms/vxlan: do not reuse cached ip_hdr() value after skb_tunnel_check_pmtu() Eva Kurchatova
2026-08-31 22:48 ` [Devel] [PATCH vz10 2/7] selftests: net: run the fdb and bind tests in their own netns Eva Kurchatova
2026-09-21 14:51 ` Vladimir Riabchun
2026-08-31 22:48 ` [Devel] [PATCH vz10 3/7] selftests: net: skip what this kernel and iproute2 do not have Eva Kurchatova
2026-09-21 14:51 ` Vladimir Riabchun
2026-08-31 22:48 ` [Devel] [PATCH vz10 4/7] selftests: net: make the veth GRO checks independent of host tunnels Eva Kurchatova
2026-09-21 14:51 ` Vladimir Riabchun [this message]
2026-08-31 22:48 ` [Devel] [PATCH vz10 5/7] selftests: net: install pmtu.sh, the script pmtu_wrapper.sh runs Eva Kurchatova
2026-09-21 14:51 ` Vladimir Riabchun
2026-08-31 22:48 ` [Devel] [PATCH vz10 6/7] selftests: net: mark test_ingress_egress_chaining.sh executable Eva Kurchatova
2026-09-21 14:51 ` Vladimir Riabchun
2026-08-31 22:48 ` [Devel] [PATCH vz10 7/7] selftests: net: let the bridged PMTU tests take the ICMP they ask for Eva Kurchatova
2026-09-21 14:51 ` Vladimir Riabchun
2026-09-18 10:50 ` [Devel] [PATCH vz10 1/7] ms/vxlan: do not reuse cached ip_hdr() value after skb_tunnel_check_pmtu() Vasileios Almpanis
2026-09-21 14:51 ` Vladimir Riabchun
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