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| author |   Chris Wilson <chris@chris-wilson.co.uk> | 2018-03-30 16:01:32 +0100 |
|---|---|---|
| committer |   Steven Rostedt (VMware) <rostedt@goodmis.org> | 2018-04-06 08:56:47 -0400 |
| commit | 913ea4d0b1074bac4c42a43ac1677dc56bbbcc52 (patch) | |
| tree | a9eb41e8b6c0a27276fbefd6e517c6565a148056 /kernel | |
| parent | tracing: Default to using trace_global_clock if sched_clock is unstable (diff) | |
| download | linux-dev-913ea4d0b1074bac4c42a43ac1677dc56bbbcc52.tar.xz linux-dev-913ea4d0b1074bac4c42a43ac1677dc56bbbcc52.zip | |
tracing: Mention trace_clock=global when warning about unstable clocks
Mention the alternative of adding trace_clock=global to the kernel
command line when we detect that we've used an unstable clock across a
suspend/resume cycle.
Link: http://lkml.kernel.org/r/20180330150132.16903-2-chris@chris-wilson.co.uk
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
Diffstat (limited to 'kernel')
| -rw-r--r-- | kernel/trace/ring_buffer.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/kernel/trace/ring_buffer.c b/kernel/trace/ring_buffer.c index a2fd3893cc02..515be03e3009 100644 --- a/kernel/trace/ring_buffer.c +++ b/kernel/trace/ring_buffer.c @@ -2731,7 +2731,8 @@ rb_handle_timestamp(struct ring_buffer_per_cpu *cpu_buffer, sched_clock_stable() ? "" : "If you just came from a suspend/resume,\n" "please switch to the trace global clock:\n" - " echo global > /sys/kernel/debug/tracing/trace_clock\n"); + " echo global > /sys/kernel/debug/tracing/trace_clock\n" + "or add trace_clock=global to the kernel command line\n"); info->add_timestamp = 1; } |