From: Luiz Capitulino <lcapitulino@redhat.com>
To: linux-kernel@vger.kernel.org
Cc: rostedt@goodmis.org
Subject: [PATCH] tracing: hwlat: update old comment
Date: Mon, 13 Feb 2017 12:25:17 -0500 [thread overview]
Message-ID: <20170213122517.6e211955@redhat.com> (raw)
The ftrace hwlat does support a cpumask.
Signed-off-by: Luiz Capitulino <lcapitulino@redhat.com>
---
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 af344a1b..1199fe1 100644
--- a/kernel/trace/trace_hwlat.c
+++ b/kernel/trace/trace_hwlat.c
@@ -322,10 +322,7 @@ static void move_to_next_cpu(bool initmask)
* 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)
{
--
2.5.5
next reply other threads:[~2017-02-13 17:25 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-02-13 17:25 Luiz Capitulino [this message]
2017-02-14 20:05 ` [PATCH] tracing: hwlat: update old comment Steven Rostedt
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