LKML Archive on lore.kernel.org
help / color / mirror / Atom feed
From: Byungchul Park <byungchul.park@lge.com>
To: peterz@infradead.org, mingo@kernel.org, rostedt@goodmis.org
Cc: tglx@linutronix.de, raistlin@linux.it,
	linux-kernel@vger.kernel.org, juri.lelli@gmail.com,
	bristot@redhat.com, kernel-team@lge.com
Subject: [RESEND PATCH v3 1/2] sched/deadline: Add cpudl_maximum_dl() for clean-up
Date: Fri, 29 Dec 2017 08:32:13 +0900	[thread overview]
Message-ID: <1514503934-10244-1-git-send-email-byungchul.park@lge.com> (raw)

Changes from v2
 - Run spellchecker over the text and fix typos
 - Add acked-by Daniel

Changes from v1
 - Enhance commit msg
 - Prevent WARN in cpumask_test_cpu() in cpudl_find() when best_cpu == -1

-----8<-----
>From 7735382d07ae6a61d740ae39ba2ecf169d43b8a2 Mon Sep 17 00:00:00 2001
From: Byungchul Park <byungchul.park@lge.com>
Date: Wed, 22 Mar 2017 14:25:56 +0900
Subject: [RESEND PATCH v3 1/2] sched/deadline: Add cpudl_maximum_dl() for clean-up

Current code uses cpudl_maximum() to get the root node's cpu, while it
directly accesses the root node like 'cp->elements[0].dl' to get the
root node's dl. It would be more readable to add a function for the dl,
as well. Added it.

Signed-off-by: Byungchul Park <byungchul.park@lge.com>
Acked-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
Acked-by: Daniel Bristot de Oliveira <bristot@redhat.com>
---
 kernel/sched/cpudeadline.c | 11 ++++++++---
 1 file changed, 8 insertions(+), 3 deletions(-)

diff --git a/kernel/sched/cpudeadline.c b/kernel/sched/cpudeadline.c
index 8d9562d..9f02035 100644
--- a/kernel/sched/cpudeadline.c
+++ b/kernel/sched/cpudeadline.c
@@ -108,11 +108,16 @@ static void cpudl_heapify(struct cpudl *cp, int idx)
 		cpudl_heapify_down(cp, idx);
 }
 
-static inline int cpudl_maximum(struct cpudl *cp)
+static inline int cpudl_maximum_cpu(struct cpudl *cp)
 {
 	return cp->elements[0].cpu;
 }
 
+static inline u64 cpudl_maximum_dl(struct cpudl *cp)
+{
+	return cp->elements[0].dl;
+}
+
 /*
  * cpudl_find - find the best (later-dl) CPU in the system
  * @cp: the cpudl max-heap context
@@ -130,11 +135,11 @@ int cpudl_find(struct cpudl *cp, struct task_struct *p,
 	    cpumask_and(later_mask, cp->free_cpus, &p->cpus_allowed)) {
 		return 1;
 	} else {
-		int best_cpu = cpudl_maximum(cp);
+		int best_cpu = cpudl_maximum_cpu(cp);
 		WARN_ON(best_cpu != -1 && !cpu_present(best_cpu));
 
 		if (cpumask_test_cpu(best_cpu, &p->cpus_allowed) &&
-		    dl_time_before(dl_se->deadline, cp->elements[0].dl)) {
+		    dl_time_before(dl_se->deadline, cpudl_maximum_dl(cp))) {
 			if (later_mask)
 				cpumask_set_cpu(best_cpu, later_mask);
 
-- 
1.9.1

             reply	other threads:[~2017-12-28 23:33 UTC|newest]

Thread overview: 15+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2017-12-28 23:32 Byungchul Park [this message]
2017-12-28 23:32 ` [RESEND PATCH v3 2/2] sched/deadline: Initialize cp->elements[].cpu to an invalid value Byungchul Park
  -- strict thread matches above, loose matches on Subject: below --
2018-01-08  6:14 [RESEND PATCH v3 1/2] sched/deadline: Add cpudl_maximum_dl() for clean-up Byungchul Park
2018-01-11  9:07 ` Peter Zijlstra
2018-02-09  0:37   ` Byungchul Park
2018-02-26  7:51   ` Byungchul Park
2018-03-13  5:52   ` Byungchul Park
2018-04-23  7:01     ` Byungchul Park
2018-05-09  6:33   ` Byungchul Park
2018-05-25  5:13     ` Byungchul Park
2018-06-01  3:07       ` Byungchul Park
2018-06-01  6:02         ` Joel Fernandes
2018-06-01  6:30           ` Byungchul Park
2017-12-19  1:19 Byungchul Park
2017-12-22  6:53 ` Byungchul Park

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=1514503934-10244-1-git-send-email-byungchul.park@lge.com \
    --to=byungchul.park@lge.com \
    --cc=bristot@redhat.com \
    --cc=juri.lelli@gmail.com \
    --cc=kernel-team@lge.com \
    --cc=linux-kernel@vger.kernel.org \
    --cc=mingo@kernel.org \
    --cc=peterz@infradead.org \
    --cc=raistlin@linux.it \
    --cc=rostedt@goodmis.org \
    --cc=tglx@linutronix.de \
    --subject='Re: [RESEND PATCH v3 1/2] sched/deadline: Add cpudl_maximum_dl() for clean-up' \
    /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

This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).