Re: [PATCH v6 net-next 15/15] net: Move per-CPU flush-lists to bpf_net_context on PREEMPT_RT.

[Jesper Dangaard Brouer]

On 12/06/2024 18.44, Sebastian Andrzej Siewior wrote:
> The per-CPU flush lists, which are accessed from within the NAPI callback
> (xdp_do_flush() for instance), are per-CPU. There are subject to the
> same problem as struct bpf_redirect_info.
>
> Add the per-CPU lists cpu_map_flush_list, dev_map_flush_list and
> xskmap_map_flush_list to struct bpf_net_context. Add wrappers for the
> access. The lists initialized on first usage (similar to
> bpf_net_ctx_get_ri()).
[...]
> Reviewed-by: Toke Høiland-Jørgensen<toke@xxxxxxxxxx>
> Signed-off-by: Sebastian Andrzej Siewior<bigeasy@xxxxxxxxxxxxx>
> ---
>   include/linux/filter.h | 42 ++++++++++++++++++++++++++++++++++++++++++
>   kernel/bpf/cpumap.c    | 19 +++----------------
>   kernel/bpf/devmap.c    | 11 +++--------
>   net/xdp/xsk.c          | 12 ++++--------
>   4 files changed, 52 insertions(+), 32 deletions(-)

Acked-by: Jesper Dangaard Brouer <hawk@xxxxxxxxxx>