On Fri, Jan 18, 2019 at 12:09:38PM -0300, Arnaldo Carvalho de Melo wrote: > commit 1b3b3dee572d0b77a316ab6715091201be6832de > Author: Arnaldo Carvalho de Melo <a...@redhat.com> > Date: Fri Jan 11 13:20:20 2019 -0300 > > perf: Make perf_event_output() propagate the output() return > > For the original mode of operation it isn't needed, since we report back > errors via PERF_RECORD_LOST records in the ring buffer, but for use in > bpf_perf_event_output() it is convenient to return the errors, basically > -ENOSPC. > > Currently bpf_perf_event_output() returns an error indication, the last > thing it does, which is to push it to the ring buffer is that can fail > and if so, this failure won't be reported back to its users, fix it. > > Reported-by: Jamal Hadi Salim <j...@mojatatu.com> > Tested-by: Jamal Hadi Salim <j...@mojatatu.com> > Cc: Adrian Hunter <adrian.hun...@intel.com> > Cc: Alexei Starovoitov <alexei.starovoi...@gmail.com> > Cc: Daniel Borkmann <dan...@iogearbox.net> > Cc: Jiri Olsa <jo...@kernel.org> > Cc: Namhyung Kim <namhy...@kernel.org> > Cc: Peter Zijlstra <pet...@infradead.org> > Link: https://lkml.kernel.org/r/20190111155538.gx22...@kernel.org > Signed-off-by: Arnaldo Carvalho de Melo <a...@redhat.com>
/me hates on git-format :-) Acked-by: Peter Zijlstra (Intel) <pet...@infradead.org>
