Hello, On Wed, Feb 21, 2024 at 9:24 AM Alexei Starovoitov <alexei.starovoitov@xxxxxxxxx> wrote: > > 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. I was planning to implement the multi link for tracing after this series in another series. I can do it together with this series if you prefer. Thanks! Menglong Dong
