From: Steven Rostedt <rostedt@goodmis.org>
To: linux-kernel@vger.kernel.org
Cc: Ingo Molnar <mingo@kernel.org>,
Andrew Morton <akpm@linux-foundation.org>,
Peter Zijlstra <peterz@infradead.org>,
Masami Hiramatsu <mhiramat@kernel.org>,
Alexei Starovoitov <alexei.starovoitov@gmail.com>,
Peter Wu <peter@lekensteyn.nl>, Jonathan Corbet <corbet@lwn.net>,
Tom Zanussi <zanussi@kernel.org>
Subject: [RFC][PATCH 09/11] tracing: Do not disable tracing when reading the trace file
Date: Tue, 17 Mar 2020 17:32:31 -0400 [thread overview]
Message-ID: <20200317213416.903351225@goodmis.org> (raw)
In-Reply-To: 20200317213222.421100128@goodmis.org
From: "Steven Rostedt (VMware)" <rostedt@goodmis.org>
When opening the "trace" file, it is no longer necessary to disable tracing.
Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
---
kernel/trace/trace.c | 8 --------
1 file changed, 8 deletions(-)
diff --git a/kernel/trace/trace.c b/kernel/trace/trace.c
index 1085b3d5d0dc..a60f49c401f9 100644
--- a/kernel/trace/trace.c
+++ b/kernel/trace/trace.c
@@ -4261,10 +4261,6 @@ __tracing_open(struct inode *inode, struct file *file, bool snapshot)
if (trace_clocks[tr->clock_id].in_ns)
iter->iter_flags |= TRACE_FILE_TIME_IN_NS;
- /* stop the trace while dumping if we are not opening "snapshot" */
- if (!iter->snapshot)
- tracing_stop_tr(tr);
-
if (iter->cpu_file == RING_BUFFER_ALL_CPUS) {
for_each_tracing_cpu(cpu) {
iter->buffer_iter[cpu] =
@@ -4358,10 +4354,6 @@ static int tracing_release(struct inode *inode, struct file *file)
if (iter->trace && iter->trace->close)
iter->trace->close(iter);
- if (!iter->snapshot)
- /* reenable tracing if it was previously enabled */
- tracing_start_tr(tr);
-
__trace_array_put(tr);
mutex_unlock(&trace_types_lock);
--
2.25.1
next prev parent reply other threads:[~2020-03-17 21:35 UTC|newest]
Thread overview: 18+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-03-17 21:32 [RFC][PATCH 00/11] ring-buffer/tracing: Remove disabling of ring buffer while reading trace file Steven Rostedt
2020-03-17 21:32 ` [RFC][PATCH 01/11] tracing: Save off entry when peeking at next entry Steven Rostedt
2020-03-19 13:41 ` Masami Hiramatsu
2020-03-19 19:53 ` Steven Rostedt
2020-03-17 21:32 ` [RFC][PATCH 02/11] ring-buffer: Have ring_buffer_empty() not depend on tracing stopped Steven Rostedt
2020-03-17 21:32 ` [RFC][PATCH 03/11] ring-buffer: Rename ring_buffer_read() to read_buffer_iter_advance() Steven Rostedt
2020-03-17 21:32 ` [RFC][PATCH 04/11] ring-buffer: Add page_stamp to iterator for synchronization Steven Rostedt
2020-03-17 21:32 ` [RFC][PATCH 05/11] ring-buffer: Have rb_iter_head_event() handle concurrent writer Steven Rostedt
2020-03-17 21:32 ` [RFC][PATCH 06/11] ring-buffer: Do not die if rb_iter_peek() fails more than thrice Steven Rostedt
2020-03-17 21:32 ` [RFC][PATCH 07/11] ring-buffer: Optimize rb_iter_head_event() Steven Rostedt
2020-03-17 21:32 ` [RFC][PATCH 08/11] ring-buffer: Do not disable recording when there is an iterator Steven Rostedt
2020-03-17 21:32 ` Steven Rostedt [this message]
2020-03-17 21:32 ` [RFC][PATCH 10/11] ring-buffer/tracing: Have iterator acknowledge dropped events Steven Rostedt
2020-03-17 21:32 ` [RFC][PATCH 11/11] tracing: Have the document reflect that the trace file keeps tracing enabled Steven Rostedt
2020-03-18 15:13 ` [RFC][PATCH 12/11] selftest/ftrace: Fix function trigger test to handle trace not disabling the tracer Steven Rostedt
2020-03-18 16:35 ` Shuah Khan
2020-03-19 13:04 ` Masami Hiramatsu
2020-03-19 5:27 ` [RFC][PATCH 00/11] ring-buffer/tracing: Remove disabling of ring buffer while reading trace file Alexei Starovoitov
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