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    perf evsel: Set attr.task bit for a tracking event · 62e503b7
    Namhyung Kim 提交于
    The perf_event_attr.task bit is to track task (fork and exit) events but
    it missed to be set by perf_evsel__config().  While it was not a problem
    in practice since setting other bits (comm/mmap) ended up being in same
    result, it'd be good to set it explicitly anyway.
    
    The attr->task is to track task related events (fork/exit) only but
    other meta events like comm and mmap[2] also needs the task events.  So
    setting attr->comm and/or attr->mmap causes the kernel emits the task
    events anyway.  So the attr->task is only meaningful when other bits are
    off but I'd like to set it for completeness.
    Signed-off-by: NNamhyung Kim <namhyung@kernel.org>
    Cc: Adrian Hunter <adrian.hunter@intel.com>
    Cc: Andi Kleen <andi@firstfloor.org>
    Cc: David Ahern <dsahern@gmail.com>
    Cc: Frederic Weisbecker <fweisbec@gmail.com>
    Cc: Jiri Olsa <jolsa@redhat.com>
    Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
    Cc: Stephane Eranian <eranian@google.com>
    Link: http://lkml.kernel.org/r/1422518843-25818-6-git-send-email-namhyung@kernel.orgSigned-off-by: NArnaldo Carvalho de Melo <acme@redhat.com>
    62e503b7
evsel.c 50.7 KB