Commit 2db7ab6b authored Jun 17, 2021 by Steven Rostedt (VMware)

tracing: Have ftrace_dump_on_oops kernel parameter take numbers



The kernel parameter for ftrace_dump_on_oops can take a single assignment.
That is, it can be:

  ftrace_dump_on_oops or ftrace_dump_on_oops=orig_cpu

But the content in the sysctl file is a number.

 0 for disabled
 1 for ftrace_dump_on_oops (all CPUs)
 2 for ftrace_dump_on_oops (orig CPU)

Allow the kernel command line to take a number as well to match the sysctl
numbers.

That is:

  ftrace_dump_on_oops=1 is the same as ftrace_dump_on_oops

and

  ftrace_dump_on_oops=2 is the same as ftrace_dump_on_oops=orig_cpu

Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>

parent f3860136

kernel/trace/trace.c

+2 −2

Original line number	Diff line number	Diff line
		@@ -197,12 +197,12 @@ __setup("ftrace=", set_cmdline_ftrace);

		static int __init set_ftrace_dump_on_oops(char *str)
		{
		if (str++ != '=' \|\| !str) {
		if (str++ != '=' \|\| !str \|\| !strcmp("1", str)) {
		ftrace_dump_on_oops = DUMP_ALL;
		return 1;
		}

		if (!strcmp("orig_cpu", str)) {
		if (!strcmp("orig_cpu", str) \|\| !strcmp("2", str)) {
		ftrace_dump_on_oops = DUMP_ORIG;
		return 1;
		}