Messages in this thread | | | Date | Mon, 16 Nov 2020 13:02:09 -0800 | From | Martin KaFai Lau <> | Subject | Re: [FIX bpf,perf] bpf,perf: return EOPNOTSUPP for bpf handler on PERF_COUNT_SW_DUMMY |
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On Mon, Nov 16, 2020 at 07:37:52PM +0100, Florian Lehner wrote: > bpf handlers for perf events other than tracepoints, kprobes or uprobes > are attached to the overflow_handler of the perf event. > > Perf events of type software/dummy are placeholder events. So when > attaching a bpf handle to an overflow_handler of such an event, the bpf > handler will not be triggered. > > This fix returns the error EOPNOTSUPP to indicate that attaching a bpf > handler to a perf event of type software/dummy is not supported. > > Signed-off-by: Florian Lehner <dev@der-flo.net> It is missing a Fixes tag.
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