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| author | Baohong Liu <baohong.liu@intel.com> | 2017-09-05 16:57:19 -0500 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2017-09-27 11:00:16 +0200 |
| commit | d28e96be7c6a2a4310c83c13054475836f6ffbae (patch) | |
| tree | c93c61d3fea45523d55dc274cf1f6640c144625f /kernel/trace | |
| parent | 753154fcfefe0d8be9c68096e7709326b9ede349 (diff) | |
| download | linux-stable-d28e96be7c6a2a4310c83c13054475836f6ffbae.tar.gz linux-stable-d28e96be7c6a2a4310c83c13054475836f6ffbae.tar.bz2 linux-stable-d28e96be7c6a2a4310c83c13054475836f6ffbae.zip | |
tracing: Apply trace_clock changes to instance max buffer
commit 170b3b1050e28d1ba0700e262f0899ffa4fccc52 upstream.
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
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>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'kernel/trace')
| -rw-r--r-- | kernel/trace/trace.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/kernel/trace/trace.c b/kernel/trace/trace.c index d59ebd9d21df..4743066010c4 100644 --- a/kernel/trace/trace.c +++ b/kernel/trace/trace.c @@ -5237,7 +5237,7 @@ 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 |