From: Steven Rostedt <rostedt@goodmis.org>
To: linux-kernel@vger.kernel.org
Cc: Ingo Molnar <mingo@kernel.org>,
Andrew Morton <akpm@linux-foundation.org>,
Masami Hiramatsu <mhiramat@kernel.org>
Subject: [for-next][PATCH 14/26] tracing/boot: Add per-instance tracing_on option support
Date: Mon, 21 Sep 2020 21:24:28 -0400 [thread overview]
Message-ID: <20200922012452.005374318@goodmis.org> (raw)
In-Reply-To: 20200922012414.115238201@goodmis.org
From: Masami Hiramatsu <mhiramat@kernel.org>
Add per-instance tracing_on option, which will be useful with
traceon/traceoff event trigger actions. For example, if we
disable tracing_on by default and set traceon and traceoff on
a pair of events, we can trace functions between the pair of
events.
Link: https://lkml.kernel.org/r/159972811538.428528.2561315102284268611.stgit@devnote2
Signed-off-by: Masami Hiramatsu <mhiramat@kernel.org>
Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
---
kernel/trace/trace_boot.c | 10 ++++++++++
1 file changed, 10 insertions(+)
diff --git a/kernel/trace/trace_boot.c b/kernel/trace/trace_boot.c
index fa0fc08c6ef8..d52d441a17e8 100644
--- a/kernel/trace/trace_boot.c
+++ b/kernel/trace/trace_boot.c
@@ -40,6 +40,16 @@ trace_boot_set_instance_options(struct trace_array *tr, struct xbc_node *node)
pr_err("Failed to set option: %s\n", buf);
}
+ p = xbc_node_find_value(node, "tracing_on", NULL);
+ if (p && *p != '\0') {
+ if (kstrtoul(p, 10, &v))
+ pr_err("Failed to set tracing on: %s\n", p);
+ if (v)
+ tracer_tracing_on(tr);
+ else
+ tracer_tracing_off(tr);
+ }
+
p = xbc_node_find_value(node, "trace_clock", NULL);
if (p && *p != '\0') {
if (tracing_set_clock(tr, p) < 0)
--
2.28.0
next prev parent reply other threads:[~2020-09-22 1:26 UTC|newest]
Thread overview: 30+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-09-22 1:24 [for-next][PATCH 00/26] tracing: Updates for 5.10 Steven Rostedt
2020-09-22 1:24 ` [for-next][PATCH 01/26] tools/bootconfig: Show bootconfig compact tree from bootconfig file Steven Rostedt
2020-09-22 1:24 ` [for-next][PATCH 02/26] tools/bootconfig: Add list option Steven Rostedt
2020-09-22 1:24 ` [for-next][PATCH 03/26] tools/bootconfig: Make all functions static Steven Rostedt
2020-09-22 1:24 ` [for-next][PATCH 04/26] tools/bootconfig: Add a script to generate ftrace shell-command from bootconfig Steven Rostedt
2020-09-22 1:24 ` [for-next][PATCH 05/26] tools/bootconfig: Add a script to generates bootconfig from ftrace Steven Rostedt
2020-09-22 1:24 ` [for-next][PATCH 06/26] tools/bootconfig: Add --init option for bconf2ftrace.sh Steven Rostedt
2020-09-22 1:24 ` [for-next][PATCH 07/26] tracing: toplevel d_entry already initialized Steven Rostedt
2020-09-22 1:24 ` [for-next][PATCH 08/26] tracing: make tracing_init_dentry() returns an integer instead of a d_entry pointer Steven Rostedt
2020-09-22 1:24 ` [for-next][PATCH 09/26] tracing: Delete repeated words in comments Steven Rostedt
2020-09-22 1:24 ` [for-next][PATCH 10/26] tracing: Use __this_cpu_read() in trace_buffered_event_enable() Steven Rostedt
2020-09-22 1:24 ` [for-next][PATCH 11/26] kprobes: Use module_name() macro Steven Rostedt
2020-09-22 1:24 ` [for-next][PATCH 12/26] tracing: remove a pointless assignment Steven Rostedt
2020-09-22 1:24 ` [for-next][PATCH 13/26] fgraph: Convert ret_stack tasklist scanning to rcu Steven Rostedt
2020-09-22 1:24 ` Steven Rostedt [this message]
2020-09-22 1:24 ` [for-next][PATCH 15/26] Documentation: tracing: Add tracing_on option to boot-time tracer Steven Rostedt
2020-09-22 1:24 ` [for-next][PATCH 16/26] tracing/kprobes: Support perf-style return probe Steven Rostedt
2020-09-22 1:24 ` [for-next][PATCH 17/26] tracing/uprobes: " Steven Rostedt
2020-09-22 1:24 ` [for-next][PATCH 18/26] Documentation: tracing: Add %return suffix description Steven Rostedt
2020-09-22 1:24 ` [for-next][PATCH 19/26] Documentation: tracing: boot: Add an example of tracing function-calls Steven Rostedt
2020-09-22 1:24 ` [for-next][PATCH 20/26] selftests/ftrace: Add %return suffix tests Steven Rostedt
2020-09-22 1:24 ` [for-next][PATCH 21/26] kprobes: Init kprobes in early_initcall Steven Rostedt
2020-09-22 1:24 ` [for-next][PATCH 22/26] tracing: Define event fields early stage Steven Rostedt
2020-09-22 1:24 ` [for-next][PATCH 23/26] tracing: Enable adding dynamic events " Steven Rostedt
2020-09-22 1:24 ` [for-next][PATCH 24/26] tracing: Enable creating new instance early boot Steven Rostedt
2020-09-23 23:52 ` Masami Hiramatsu
2020-09-24 16:40 ` [PATCH] tracing/boot: Initialize per-instance event list in " Masami Hiramatsu
2020-09-25 19:37 ` Steven Rostedt
2020-09-22 1:24 ` [for-next][PATCH 25/26] tracing/boot, kprobe, synth: Initialize boot-time tracing earlier Steven Rostedt
2020-09-22 1:24 ` [for-next][PATCH 26/26] Documentation: tracing: Add the startup timing of boot-time tracing Steven Rostedt
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