From: Wang Long Date: Thu, 5 Feb 2015 05:16:14 +0000 (+0000) Subject: Documentation: Fix the wrong command `echo -1 > set_ftrace_pid` for cleaning the... X-Git-Tag: firefly_0821_release~176^2~2358^2 X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=52e68924dfa8d9de5d82f6798352eecc5f03a97d;p=firefly-linux-kernel-4.4.55.git 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 Acked-by: Steven Rostedt Signed-off-by: Jonathan Corbet --- 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 #