Donate to e Foundation | Murena handsets with /e/OS | Own a part of Murena! Learn more

Commit 170b3b10 authored by Baohong Liu's avatar Baohong Liu Committed by Steven Rostedt (VMware)
Browse files

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: 277ba044 ("tracing: Add interface to allow multiple trace buffers")
Signed-off-by: default avatarBaohong Liu <baohong.liu@intel.com>
Signed-off-by: default avatarSteven Rostedt (VMware) <rostedt@goodmis.org>
parent 7685ab6c

kernel/trace/trace.c

+1 −1
Original line number Diff line number Diff line
@@ -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