All of lore.kernel.org
 help / color / mirror / Atom feed
From: Steven Rostedt <rostedt@goodmis.org>
To: linux-kernel@vger.kernel.org
Cc: Ingo Molnar <mingo@kernel.org>,
	Andrew Morton <akpm@linux-foundation.org>,
	Luiz Capitulino <lcapitulino@redhat.com>
Subject: [for-next][PATCH 4/8] tracing/hwlat: Update old comment about migration
Date: Wed, 15 Feb 2017 09:04:54 -0500	[thread overview]
Message-ID: <20170215140504.560085026@goodmis.org> (raw)
In-Reply-To: 20170215140450.739053917@goodmis.org

[-- Attachment #1: 0004-tracing-hwlat-Update-old-comment-about-migration.patch --]
[-- Type: text/plain, Size: 1154 bytes --]

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

  parent reply	other threads:[~2017-02-15 14:05 UTC|newest]

Thread overview: 9+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2017-02-15 14:04 [for-next][PATCH 0/8] tracing: More updates for 4.11 Steven Rostedt
2017-02-15 14:04 ` [for-next][PATCH 1/8] tracing: Have COMM event filter key be treated as a string Steven Rostedt
2017-02-15 14:04 ` [for-next][PATCH 2/8] tracing: Have traceprobe_probes_write() not access userspace unnecessarily Steven Rostedt
2017-02-15 14:04 ` [for-next][PATCH 3/8] timers: Make flags output in the timer_start tracepoint useful Steven Rostedt
2017-02-15 14:04 ` Steven Rostedt [this message]
2017-02-15 14:04 ` [for-next][PATCH 5/8] tracing/probe: Show subsystem name in messages Steven Rostedt
2017-02-15 14:04 ` [for-next][PATCH 6/8] jump_label: Reduce the size of struct static_key Steven Rostedt
2017-02-15 14:04 ` [for-next][PATCH 7/8] tracing: Use modern function declaration Steven Rostedt
2017-02-15 14:04 ` [for-next][PATCH 8/8] tracing: Fix return value check in trace_benchmark_reg() Steven Rostedt

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=20170215140504.560085026@goodmis.org \
    --to=rostedt@goodmis.org \
    --cc=akpm@linux-foundation.org \
    --cc=lcapitulino@redhat.com \
    --cc=linux-kernel@vger.kernel.org \
    --cc=mingo@kernel.org \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line before the message body.
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.