On Mon, Apr 28, 2025 at 04:16:52PM +0800, Jiayuan Chen wrote: > +bpf_sk_skb_set_redirect_cpu() > +^^^^^^^^^^^^^^^^^^^^^^ > +.. code-block:: c > + > + int bpf_sk_skb_set_redirect_cpu(struct __sk_buff *s, int redir_cpu) > + > +This kfunc ``bpf_sk_skb_set_redirect_cpu()`` is available to > +``BPF_PROG_TYPE_SK_SKB`` BPF programs. It sets the CPU affinity, allowing the > +sockmap packet redirecting process to run on the specified CPU as much as > +possible, helping users reduce the interference between the sockmap > redirecting > +background thread and other threads. > +
I am wondering if it is a better idea to use BPF_MAP_TYPE_CPUMAP for redirection here instead? Like we did for bpf_redirect_map(). At least we would not need to store CPU in psock with this approach. Thanks.
