Wang Long 52e68924df Documentation: Fix the wrong command echo -1 > set_ftrace_pid for cleaning the filter.
The command `echo > set_ftrace_pid` should be used to clean the filter quietly.
because the command `echo -1 >  set_ftrace_pid` will output the following:
"bash: echo: write error: Invalid argument".

so update the file Documentation/trace/ftrace.txt.

Signed-off-by: Wang Long <long.wanglong@huawei.com>
Acked-by: Steven Rostedt <rostedt@goodmis.org>
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
2015-02-09 11:04:17 -05:00
..
2014-05-05 15:32:05 +02:00
2014-03-21 13:16:58 +01:00