On Sat, Nov 14, 2020 at 5:53 AM Florian Lehner <d...@der-flo.net> wrote: > > At the moment it is not possible to attach a bpf handler to a perf event > of type PERF_TYPE_SOFTWARE with a configuration of PERF_COUNT_SW_DUMMY.
It is possible or it is not possible? Such "commit log as an abstract statement" patches are a mystery to a reader. Please explain what problem you're trying to solve and how it's being addressed. > Signed-off-by: Florian Lehner <d...@der-flo.net> > --- > kernel/events/core.c | 4 ++++ > 1 file changed, 4 insertions(+) > > diff --git a/kernel/events/core.c b/kernel/events/core.c > index da467e1dd49a..4e8846b7ceda 100644 > --- a/kernel/events/core.c > +++ b/kernel/events/core.c > @@ -9668,6 +9668,10 @@ static int perf_event_set_bpf_handler(struct > perf_event *event, u32 prog_fd) > if (event->prog) > return -EEXIST; > > + if (event->attr.type == PERF_TYPE_SOFTWARE && > + event->attr.config == PERF_COUNT_SW_DUMMY) > + return -EOPNOTSUPP; Is it a fix or a feature? If it is a fix please add 'Fixes:' tag.
