netdev - Re: [PATCH net-next 0/3] Change BPF_TEST_RUN use the system page pool for live XDP frames

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Message-ID: <4a1ef449-5189-4788-ae51-3d1c4a09d3a2@intel.com>
Date: Thu, 15 Feb 2024 16:30:03 +0100
From: Alexander Lobakin <aleksander.lobakin@...el.com>
To: Toke Høiland-Jørgensen <toke@...hat.com>
CC: "David S. Miller" <davem@...emloft.net>, Eric Dumazet
	<edumazet@...gle.com>, Jakub Kicinski <kuba@...nel.org>, Paolo Abeni
	<pabeni@...hat.com>, Alexei Starovoitov <ast@...nel.org>, Daniel Borkmann
	<daniel@...earbox.net>, Andrii Nakryiko <andrii@...nel.org>, Martin KaFai Lau
	<martin.lau@...ux.dev>, Eduard Zingerman <eddyz87@...il.com>, Song Liu
	<song@...nel.org>, Yonghong Song <yonghong.song@...ux.dev>, John Fastabend
	<john.fastabend@...il.com>, KP Singh <kpsingh@...nel.org>, Stanislav Fomichev
	<sdf@...gle.com>, Hao Luo <haoluo@...gle.com>, Jiri Olsa <jolsa@...nel.org>,
	Jesper Dangaard Brouer <hawk@...nel.org>, <netdev@...r.kernel.org>,
	<bpf@...r.kernel.org>
Subject: Re: [PATCH net-next 0/3] Change BPF_TEST_RUN use the system page pool
 for live XDP frames

From: Toke Høiland-Jørgensen <toke@...hat.com>
Date: Thu, 15 Feb 2024 14:26:29 +0100

> Now that we have a system-wide page pool, we can use that for the live
> frame mode of BPF_TEST_RUN (used by the XDP traffic generator), and
> avoid the cost of creating a separate page pool instance for each
> syscall invocation. See the individual patches for more details.

Tested xdp-trafficgen on my development tree[0], no regressions from the
net-next with my patch which increases live frames PP size.

Reviewed-by: Alexander Lobakin <aleksander.lobakin@...el.com>
Tested-by: Alexander Lobakin <aleksander.lobakin@...el.com>

(with some cosmetics like[1])

> 
> Toke Høiland-Jørgensen (3):
>   net: Register system page pool as an XDP memory model
>   bpf: test_run: Use system page pool for XDP live frame mode
>   bpf: test_run: Fix cacheline alignment of live XDP frame data
>     structures
> 
>  include/linux/netdevice.h |   1 +
>  net/bpf/test_run.c        | 138 +++++++++++++++++++-------------------
>  net/core/dev.c            |  13 +++-
>  3 files changed, 81 insertions(+), 71 deletions(-)
> 

[0] https://github.com/alobakin/linux/commits/idpf-libie-new
[1] https://github.com/alobakin/linux/commit/62b4cb03486a

Thanks,
Olek