perf top: fix segfault
c6eb13 increased stack usage such that perf-top now croaks on startup.
Take event_array and mmap_array off the stack to prevent segfault on boxen
with smallish ulimit -s setting.
Signed-off-by: Mike Galbraith <efault@gmx.de>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Corey Ashford <cjashfor@linux.vnet.ibm.com>
Cc: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: John Kacur <jkacur@redhat.com>
LKML-Reference: <new-submission>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
diff --git a/Documentation/perf_counter/builtin-top.c b/Documentation/perf_counter/builtin-top.c
index a3216a6..74021ac 100644
--- a/Documentation/perf_counter/builtin-top.c
+++ b/Documentation/perf_counter/builtin-top.c
@@ -1035,10 +1035,11 @@
md->prev = old;
}
+static struct pollfd event_array[MAX_NR_CPUS * MAX_COUNTERS];
+static struct mmap_data mmap_array[MAX_NR_CPUS][MAX_COUNTERS];
+
int cmd_top(int argc, char **argv, const char *prefix)
{
- struct pollfd event_array[MAX_NR_CPUS * MAX_COUNTERS];
- struct mmap_data mmap_array[MAX_NR_CPUS][MAX_COUNTERS];
struct perf_counter_hw_event hw_event;
pthread_t thread;
int i, counter, group_fd, nr_poll = 0;