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| author |   Ingo Molnar <mingo@elte.hu> | 2009-04-06 01:41:22 +0200 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2009-04-06 01:41:22 +0200 |
| commit | 9efe21cb82b5dbe3b0b2ae4de4eccc64ecb94e95 (patch) | |
| tree | 7ff8833745d2f268f897f6fa4a27263b4a572245 /kernel/trace/trace_stack.c | |
| parent | genirq: fix devres.o build for GENERIC_HARDIRQS=n (diff) | |
| parent | Merge branch 'audit.b62' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/audit-current (diff) | |
| download | wireguard-linux-9efe21cb82b5dbe3b0b2ae4de4eccc64ecb94e95.tar.xz wireguard-linux-9efe21cb82b5dbe3b0b2ae4de4eccc64ecb94e95.zip | |
Merge branch 'linus' into irq/threaded
Conflicts:
include/linux/irq.h
kernel/irq/handle.c
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; } |