Messages in this thread Patch in this message | | | From | Wang Long <> | Subject | [PATCH] Documentation: Fix the wrong command `echo -1 > set_ftrace_pid` for cleaning the filter. | Date | Thu, 5 Feb 2015 05:16:14 +0000 |
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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> --- Documentation/trace/ftrace.txt | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/Documentation/trace/ftrace.txt b/Documentation/trace/ftrace.txt index 8408e04..572ca92 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 # -- 1.8.3.4
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