> On Aug 25, 2022, at 9:57 AM, Namhyung Kim <namhyung@xxxxxxxxxx> wrote: > > On Tue, Aug 23, 2022 at 10:32 PM John Fastabend > <john.fastabend@xxxxxxxxx> wrote: >> Namhyung Kim wrote: >>> Ok, now I think that I can use a bpf-output sw event. It would need >>> another BPF program to write data to the event and the test program >>> can read it from BPF using this helper. :) >> >> Ah good idea. Feel free to carry my ACK to the v2 with the test. > > Hmm.. it seems not to work because > 1. bpf_output sw event doesn't have the overflow mechanism and it > doesn't call the bpf program. > 2. even if I added it, it couldn't run due to the recursion protection by > bpf_prog_active. How about we enable some raw record for a software event? Something not controlled by BPF? If this doesn't work, a self test that only runs on some hardware is also helpful. Thanks, Song
