diff options
Diffstat (limited to 'Documentation/trace/ftrace.txt')
-rw-r--r-- | Documentation/trace/ftrace.txt | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/Documentation/trace/ftrace.txt b/Documentation/trace/ftrace.txt index 8179692fbb90..03485bfbd797 100644 --- a/Documentation/trace/ftrace.txt +++ b/Documentation/trace/ftrace.txt | |||
@@ -1588,7 +1588,7 @@ module author does not need to worry about it. | |||
1588 | 1588 | ||
1589 | When tracing is enabled, kstop_machine is called to prevent | 1589 | When tracing is enabled, kstop_machine is called to prevent |
1590 | races with the CPUS executing code being modified (which can | 1590 | races with the CPUS executing code being modified (which can |
1591 | cause the CPU to do undesireable things), and the nops are | 1591 | cause the CPU to do undesirable things), and the nops are |
1592 | patched back to calls. But this time, they do not call mcount | 1592 | patched back to calls. But this time, they do not call mcount |
1593 | (which is just a function stub). They now call into the ftrace | 1593 | (which is just a function stub). They now call into the ftrace |
1594 | infrastructure. | 1594 | infrastructure. |
@@ -1625,7 +1625,7 @@ If I am only interested in sys_nanosleep and hrtimer_interrupt: | |||
1625 | 1625 | ||
1626 | # echo sys_nanosleep hrtimer_interrupt \ | 1626 | # echo sys_nanosleep hrtimer_interrupt \ |
1627 | > set_ftrace_filter | 1627 | > set_ftrace_filter |
1628 | # echo ftrace > current_tracer | 1628 | # echo function > current_tracer |
1629 | # echo 1 > tracing_enabled | 1629 | # echo 1 > tracing_enabled |
1630 | # usleep 1 | 1630 | # usleep 1 |
1631 | # echo 0 > tracing_enabled | 1631 | # echo 0 > tracing_enabled |