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cpusets: enable the dynamical domain flags

PATCH In review Michael Wang 1 participant 1 message Jul 17, 2012 Scheduler

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Michael Wang

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PATCH 3/5 cpusets: enable the dynamical domain flags

From: Michael Wang <[email protected]>

We will record the domain flags for cpuset in update_domain_attr and use it to replace the static domain flags in set_domain_attribute.

Signed-off-by Michael Wang <[email protected]>
---
 kernel/cpuset.c     |    7 +++++++
 kernel/sched/core.c |   10 +++++++++-
 2 files changed, 16 insertions(+), 1 deletions(-)
kernel/cpuset.c +7 -0
index 67ee111..def8080 100644
@@ -476,8 +476,15 @@ static int cpusets_overlap(struct cpuset *a, struct cpuset *b)
 static void
 update_domain_attr(struct sched_domain_attr *dattr, struct cpuset *c)
 {
+	int i;
 	if (dattr->relax_domain_level < c->relax_domain_level)
 		dattr->relax_domain_level = c->relax_domain_level;
+	/* record all the domain flags if cpuset want to use them */
+	if (c->enable_ddf) {
+		dattr->enable_ddf = 1;
+		for (i = 0; i < MAX_DDF; i++)
+			dattr->ddf[i] = c->ddf[i];
+	}
 	return;
 }
kernel/sched/core.c +9 -1
index 3f9d368..7a1c886 100644
@@ -6461,7 +6461,15 @@ static void set_domain_attribute(struct sched_domain *sd,
 {
 	int request;
 
-	if (!attr || attr->relax_domain_level < 0) {
+	if (!attr)
+		return;
+
+	if (attr->enable_ddf) {
+		/* replace domain flags with ddf according to level */
+		sd->flags = attr->ddf[sd->level];
+	}
+
+	if (attr->relax_domain_level < 0) {
 		if (default_relax_domain_level < 0)
 			return;
 		else
Signature · 1 line
1.7.4.1