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Groups > linux.kernel > #1581326
| From | Steven Rostedt <rostedt@goodmis.org> |
|---|---|
| Newsgroups | linux.kernel |
| Subject | [for-next][PATCH 4/8] tracing/hwlat: Update old comment about migration |
| Date | 2017-02-15 15:10 +0100 |
| Message-ID | <tb8ro-107-17@gated-at.bofh.it> (permalink) |
| References | <tb8ro-107-13@gated-at.bofh.it> |
| Organization | linux.* mail to news gateway |
From: Luiz Capitulino <lcapitulino@redhat.com>
The ftrace hwlat does support a cpumask.
Link: http://lkml.kernel.org/r/20170213122517.6e211955@redhat.com
Signed-off-by: Luiz Capitulino <lcapitulino@redhat.com>
Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
---
kernel/trace/trace_hwlat.c | 5 +----
1 file changed, 1 insertion(+), 4 deletions(-)
diff --git a/kernel/trace/trace_hwlat.c b/kernel/trace/trace_hwlat.c
index 775569ec50d0..bf209d2657ab 100644
--- a/kernel/trace/trace_hwlat.c
+++ b/kernel/trace/trace_hwlat.c
@@ -322,10 +322,7 @@ static void move_to_next_cpu(void)
* need to ensure nothing else might be running (and thus preempting).
* Obviously this should never be used in production environments.
*
- * Currently this runs on which ever CPU it was scheduled on, but most
- * real-world hardware latency situations occur across several CPUs,
- * but we might later generalize this if we find there are any actualy
- * systems with alternate SMI delivery or other hardware latencies.
+ * Executes one loop interaction on each CPU in tracing_cpumask sysfs file.
*/
static int kthread_fn(void *data)
{
--
2.10.2
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[for-next][PATCH 0/8] tracing: More updates for 4.11 Steven Rostedt <rostedt@goodmis.org> - 2017-02-15 15:10 +0100 [for-next][PATCH 4/8] tracing/hwlat: Update old comment about migration Steven Rostedt <rostedt@goodmis.org> - 2017-02-15 15:10 +0100 [for-next][PATCH 3/8] timers: Make flags output in the timer_start tracepoint useful Steven Rostedt <rostedt@goodmis.org> - 2017-02-15 15:10 +0100 [for-next][PATCH 5/8] tracing/probe: Show subsystem name in messages Steven Rostedt <rostedt@goodmis.org> - 2017-02-15 15:10 +0100 [for-next][PATCH 7/8] tracing: Use modern function declaration Steven Rostedt <rostedt@goodmis.org> - 2017-02-15 15:10 +0100 [for-next][PATCH 1/8] tracing: Have COMM event filter key be treated as a string Steven Rostedt <rostedt@goodmis.org> - 2017-02-15 15:10 +0100 [for-next][PATCH 2/8] tracing: Have traceprobe_probes_write() not access userspace unnecessarily Steven Rostedt <rostedt@goodmis.org> - 2017-02-15 15:10 +0100 [for-next][PATCH 6/8] jump_label: Reduce the size of struct static_key Steven Rostedt <rostedt@goodmis.org> - 2017-02-15 15:10 +0100 [for-next][PATCH 8/8] tracing: Fix return value check in trace_benchmark_reg() Steven Rostedt <rostedt@goodmis.org> - 2017-02-15 15:10 +0100
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