From: Steven Rostedt <rostedt@goodmis.org>
To: LKML <linux-kernel@vger.kernel.org>
Cc: Ingo Molnar <mingo@elte.hu>,
Gregory Haskins <ghaskins@novell.com>,
Peter Zijlstra <a.p.zijlstra@chello.nl>,
Christoph Lameter <clameter@sgi.com>,
Steven Rostedt <srostedt@redhat.com>
Subject: [PATCH v3 12/17] Allow current_cpu to be included in search
Date: Sat, 17 Nov 2007 01:21:16 -0500 [thread overview]
Message-ID: <20071117062404.986828854@goodmis.org> (raw)
In-Reply-To: 20071117062104.177779113@goodmis.org
[-- Attachment #1: 0004-rt-balance-allow-current-cpu-in-search.patch --]
[-- Type: text/plain, Size: 1234 bytes --]
From: Gregory Haskins <ghaskins@novell.com>
It doesn't hurt if we allow the current CPU to be included in the
search. We will just simply skip it later if the current CPU turns out
to be the lowest.
We will use this later in the series
Signed-off-by: Gregory Haskins <ghaskins@novell.com>
Signed-off-by: Steven Rostedt <srostedt@redhat.com>
---
kernel/sched_rt.c | 5 +----
1 file changed, 1 insertion(+), 4 deletions(-)
Index: linux-compile.git/kernel/sched_rt.c
===================================================================
--- linux-compile.git.orig/kernel/sched_rt.c 2007-11-16 22:23:43.000000000 -0500
+++ linux-compile.git/kernel/sched_rt.c 2007-11-16 22:23:45.000000000 -0500
@@ -270,9 +270,6 @@ static int find_lowest_rq(struct task_st
for_each_cpu_mask(cpu, cpu_mask) {
struct rq *rq = cpu_rq(cpu);
- if (cpu == rq->cpu)
- continue;
-
/* We look for lowest RT prio or non-rt CPU */
if (rq->rt.highest_prio >= MAX_RT_PRIO) {
lowest_rq = rq;
@@ -300,7 +297,7 @@ static struct rq *find_lock_lowest_rq(st
for (tries = 0; tries < RT_MAX_TRIES; tries++) {
cpu = find_lowest_rq(task);
- if (cpu == -1)
+ if ((cpu == -1) || (cpu == rq->cpu))
break;
lowest_rq = cpu_rq(cpu);
--
next prev parent reply other threads:[~2007-11-17 6:26 UTC|newest]
Thread overview: 28+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-11-17 6:21 [PATCH v3 00/17] New RT Task Balancing -v3 Steven Rostedt
2007-11-17 6:21 ` [PATCH v3 01/17] Add rt_nr_running accounting Steven Rostedt
2007-11-17 6:21 ` [PATCH v3 02/17] track highest prio queued on runqueue Steven Rostedt
2007-11-17 6:21 ` [PATCH v3 03/17] push RT tasks Steven Rostedt
2007-11-17 6:21 ` [PATCH v3 04/17] RT overloaded runqueues accounting Steven Rostedt
2007-11-17 6:21 ` [PATCH v3 05/17] pull RT tasks Steven Rostedt
2007-11-17 6:21 ` [PATCH v3 06/17] wake up balance RT Steven Rostedt
2007-11-17 6:21 ` [PATCH v3 07/17] disable CFS RT load balancing Steven Rostedt
2007-11-17 6:21 ` [PATCH v3 08/17] Cache cpus_allowed weight for optimizing migration Steven Rostedt
2007-11-17 6:21 ` [PATCH v3 09/17] Consistency cleanup for this_rq usage Steven Rostedt
2007-11-17 6:21 ` [PATCH v3 10/17] Remove some CFS specific code from the wakeup path of RT tasks Steven Rostedt
2007-11-17 17:35 ` Gregory Haskins
2007-11-17 18:51 ` Steven Rostedt
2007-11-17 6:21 ` [PATCH v3 11/17] RT: Break out the search function Steven Rostedt
2007-11-17 6:21 ` Steven Rostedt [this message]
2007-11-17 6:21 ` [PATCH v3 13/17] RT: Pre-route RT tasks on wakeup Steven Rostedt
2007-11-17 6:21 ` [PATCH v3 14/17] Optimize our cpu selection based on topology Steven Rostedt
2007-11-17 6:21 ` [PATCH v3 15/17] RT: Optimize rebalancing Steven Rostedt
2007-11-17 6:21 ` [PATCH v3 16/17] Fix schedstat handling Steven Rostedt
2007-11-17 17:40 ` Gregory Haskins
2007-11-17 18:52 ` Steven Rostedt
2007-11-17 6:21 ` [PATCH v3 17/17] --- kernel/sched_rt.c | 20 ++++++++++++++++---- 1 file changed, 16 insertions(+), 4 deletions(-) Steven Rostedt
2007-11-17 6:33 ` [PATCH v3 17/17] (Avoid overload) Steven Rostedt
2007-11-17 17:42 ` Gregory Haskins
2007-11-17 18:55 ` Steven Rostedt
2007-11-17 17:46 ` Gregory Haskins
2007-11-19 16:34 ` [PATCH] RT: restore the migratable conditional Gregory Haskins
2007-11-17 8:14 ` [PATCH v3 00/17] New RT Task Balancing -v3 Jon Masters
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