Commit-ID: 2f335a02b3c816e77e7df1d15b12e3bbb8f4c8f0 Gitweb: http://git.kernel.org/tip/2f335a02b3c816e77e7df1d15b12e3bbb8f4c8f0 Author: Frederic Weisbecker <fweisbec@xxxxxxxxx> AuthorDate: Fri, 5 Jun 2009 19:31:01 +0200 Committer: Ingo Molnar <mingo@xxxxxxx> CommitDate: Fri, 5 Jun 2009 20:42:53 +0200 perf top: Fix zero or negative refresh delay If perf top is executed with a zero value for the refresh rate, we get a division by zero exception while computing samples_per_sec. Also a zero refresh rate is not possible, neither do we want to accept negative values. [ Impact: fix division by zero in perf top ] Cc: Peter Zijlstra <a.p.zijlstra@xxxxxxxxx> Cc: Mike Galbraith <efault@xxxxxx> Cc: Paul Mackerras <paulus@xxxxxxxxx> Cc: Corey Ashford <cjashfor@xxxxxxxxxxxxxxxxxx> Cc: Marcelo Tosatti <mtosatti@xxxxxxxxxx> Cc: Arnaldo Carvalho de Melo <acme@xxxxxxxxxx> Cc: Frederic Weisbecker <fweisbec@xxxxxxxxx> LKML-Reference: <1244223061-5399-1-git-send-email-fweisbec@xxxxxxxxx> Signed-off-by: Ingo Molnar <mingo@xxxxxxx> --- Documentation/perf_counter/builtin-top.c | 3 +++ 1 files changed, 3 insertions(+), 0 deletions(-) diff --git a/Documentation/perf_counter/builtin-top.c b/Documentation/perf_counter/builtin-top.c index ff7e13c..b2f480b 100644 --- a/Documentation/perf_counter/builtin-top.c +++ b/Documentation/perf_counter/builtin-top.c @@ -693,6 +693,9 @@ int cmd_top(int argc, const char **argv, const char *prefix) event_id[0] = 0; } + if (delay_secs < 1) + delay_secs = 1; + for (counter = 0; counter < nr_counters; counter++) { if (event_count[counter]) continue; -- To unsubscribe from this list: send the line "unsubscribe linux-tip-commits" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html