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

[Alexander Lobakin <aleksander.lobakin@intel.com>]

From: Toke Høiland-Jørgensen <toke@redhat.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@intel.com>
Tested-by: Alexander Lobakin <aleksander.lobakin@intel.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