diff options
| author | Wang Long <long.wanglong@huawei.com> | 2015-02-05 05:16:14 +0000 |
|---|---|---|
| committer | Jonathan Corbet <corbet@lwn.net> | 2015-02-09 11:04:17 -0500 |
| commit | 52e68924dfa8d9de5d82f6798352eecc5f03a97d (patch) | |
| tree | 558e4fb3e080b6e92af56435199985184de04d4b /Documentation/trace | |
| parent | 67c47cfcc7103631eb57f153f7c753bbbbeb2d33 (diff) | |
| download | lwn-52e68924dfa8d9de5d82f6798352eecc5f03a97d.tar.gz lwn-52e68924dfa8d9de5d82f6798352eecc5f03a97d.zip | |
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>
Diffstat (limited to 'Documentation/trace')
| -rw-r--r-- | Documentation/trace/ftrace.txt | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/Documentation/trace/ftrace.txt b/Documentation/trace/ftrace.txt index 8408e040f06f..572ca923631a 100644 --- a/Documentation/trace/ftrace.txt +++ b/Documentation/trace/ftrace.txt @@ -1740,7 +1740,7 @@ no pid yum-updatesd-3111 [003] 1637.254683: lock_hrtimer_base <-hrtimer_try_to_cancel yum-updatesd-3111 [003] 1637.254685: fget_light <-do_sys_poll yum-updatesd-3111 [003] 1637.254686: pipe_poll <-do_sys_poll -# echo -1 > set_ftrace_pid +# echo > set_ftrace_pid # cat trace |head # tracer: function # |