Commit 8490db06 authored by Masami Hiramatsu's avatar Masami Hiramatsu Committed by Steven Rostedt (VMware)

tracing/boot: Add per-instance tracing_on option support

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@devnote2Signed-off-by: default avatarMasami Hiramatsu <mhiramat@kernel.org>
Signed-off-by: default avatarSteven Rostedt (VMware) <rostedt@goodmis.org>
parent 40d14da3
...@@ -40,6 +40,16 @@ trace_boot_set_instance_options(struct trace_array *tr, struct xbc_node *node) ...@@ -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); 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); p = xbc_node_find_value(node, "trace_clock", NULL);
if (p && *p != '\0') { if (p && *p != '\0') {
if (tracing_set_clock(tr, p) < 0) if (tracing_set_clock(tr, p) < 0)
......
Markdown is supported
0%
or
You are about to add 0 people to the discussion. Proceed with caution.
Finish editing this message first!
Please register or to comment