diff options
| author | Ingo Molnar <mingo@elte.hu> | 2009-04-21 10:46:39 +0200 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2009-04-21 10:46:54 +0200 |
| commit | 8ecee4620e76aae418bfa0e8cc830e92cb559bbb (patch) | |
| tree | 49a36784c0a26c8494a37087e37502101013b35d /kernel/trace/trace_stack.c | |
| parent | 6424fb38667fffbbb1b90be0ffd9a0c540db6a4b (diff) | |
| parent | a939b96cccdb65df80a52447ec8e4a6d79c56dbb (diff) | |
Merge branch 'linus' into x86/mm
Merge reason: refresh the topic: there's been 290 non-merges commits upstream
to arch/x86 alone.
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'kernel/trace/trace_stack.c')
| -rw-r--r-- | kernel/trace/trace_stack.c | 19 |
1 files changed, 17 insertions, 2 deletions
diff --git a/kernel/trace/trace_stack.c b/kernel/trace/trace_stack.c index d0871bc0aca5..c750f65f9661 100644 --- a/kernel/trace/trace_stack.c +++ b/kernel/trace/trace_stack.c @@ -245,16 +245,31 @@ static int trace_lookup_stack(struct seq_file *m, long i) #endif } +static void print_disabled(struct seq_file *m) +{ + seq_puts(m, "#\n" + "# Stack tracer disabled\n" + "#\n" + "# To enable the stack tracer, either add 'stacktrace' to the\n" + "# kernel command line\n" + "# or 'echo 1 > /proc/sys/kernel/stack_tracer_enabled'\n" + "#\n"); +} + static int t_show(struct seq_file *m, void *v) { long i; int size; if (v == SEQ_START_TOKEN) { - seq_printf(m, " Depth Size Location" + seq_printf(m, " Depth Size Location" " (%d entries)\n" - " ----- ---- --------\n", + " ----- ---- --------\n", max_stack_trace.nr_entries); + + if (!stack_tracer_enabled && !max_stack_size) + print_disabled(m); + return 0; } |