δΊ 2014/2/19 9:48, xiakaixu ει: > Hi all, > > There is a bug found in my work when running "perf record". The basic > information > is here. As we know, perf record is a parent process and the programme traced > is > a child process when running "perf record". Sometimes the child process become > zombie state and disappear until the parent process is killed. The bug stays > in linux/ > tools/perf/builtin-record.c. > ********************************************************************* > static int __cmd_record(struct perf_record *rec, int argc, const char **argv) > ...... > if (hits == rec->samples) { > if (done) > break; > err = poll(evsel_list->pollfd, evsel_list->nr_fds, > -1); > waking++; > } > ...... > ********************************************************************* > The parent process still call the function > poll(evsel_list->pollfd, evsel_list->nr_fds, -1) when the child process has > exited > already, which caused a zombie process. > > May I have your opinion ? > Waiting for your reply! > > Best Regards > Kaixu Xia >
-- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/