Messages in this thread Patch in this message | | | Date | Thu, 7 Sep 2017 08:46:52 -0400 | From | Steven Rostedt <> | Subject | [for-next][PATCH] tracing: Apply trace_clock changes to instance max buffer |
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git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace.git for-next
Head SHA1: 170b3b1050e28d1ba0700e262f0899ffa4fccc52
Baohong Liu (1): tracing: Apply trace_clock changes to instance max buffer
---- kernel/trace/trace.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) --------------------------- commit 170b3b1050e28d1ba0700e262f0899ffa4fccc52 Author: Baohong Liu <baohong.liu@intel.com> Date: Tue Sep 5 16:57:19 2017 -0500
tracing: Apply trace_clock changes to instance max buffer Currently trace_clock timestamps are applied to both regular and max buffers only for global trace. For instance trace, trace_clock timestamps are applied only to regular buffer. But, regular and max buffers can be swapped, for example, following a snapshot. So, for instance trace, bad timestamps can be seen following a snapshot. Let's apply trace_clock timestamps to instance max buffer as well. Link: http://lkml.kernel.org/r/ebdb168d0be042dcdf51f81e696b17fabe3609c1.1504642143.git.tom.zanussi@linux.intel.com Cc: stable@vger.kernel.org Fixes: 277ba0446 ("tracing: Add interface to allow multiple trace buffers") Signed-off-by: Baohong Liu <baohong.liu@intel.com> Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
diff --git a/kernel/trace/trace.c b/kernel/trace/trace.c index 78842557eea0..5360b7aec57a 100644 --- a/kernel/trace/trace.c +++ b/kernel/trace/trace.c @@ -6229,7 +6229,7 @@ static int tracing_set_clock(struct trace_array *tr, const char *clockstr) tracing_reset_online_cpus(&tr->trace_buffer); #ifdef CONFIG_TRACER_MAX_TRACE - if (tr->flags & TRACE_ARRAY_FL_GLOBAL && tr->max_buffer.buffer) + if (tr->max_buffer.buffer) ring_buffer_set_clock(tr->max_buffer.buffer, trace_clocks[i].func); tracing_reset_online_cpus(&tr->max_buffer); #endif
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