On Mon, Feb 19, 2024 at 7:51 PM Menglong Dong <dongmenglong.8@xxxxxxxxxxxxx> wrote: > > For now, the BPF program of type BPF_PROG_TYPE_TRACING is not allowed to > be attached to multiple hooks, and we have to create a BPF program for > each kernel function, for which we want to trace, even through all the > program have the same (or similar) logic. This can consume extra memory, > and make the program loading slow if we have plenty of kernel function to > trace. Should this be combined with multi link ? (As was recently done for kprobe_multi and uprobe_multi). Loading fentry prog once and attaching it through many bpf_links to multiple places is a nice addition, but we should probably add a multi link right away too.
