[PATCH 3/5] cpusets: enable the dynamical domain flags
From: Michael Wang
Date: Tue Jul 17 2012 - 05:04:11 EST
From: Michael Wang <wangyun@xxxxxxxxxxxxxxxxxx>
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 <wangyun@xxxxxxxxxxxxxxxxxx>
---
kernel/cpuset.c | 7 +++++++
kernel/sched/core.c | 10 +++++++++-
2 files changed, 16 insertions(+), 1 deletions(-)
diff --git a/kernel/cpuset.c b/kernel/cpuset.c
index 67ee111..def8080 100644
--- a/kernel/cpuset.c
+++ b/kernel/cpuset.c
@@ -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;
}
diff --git a/kernel/sched/core.c b/kernel/sched/core.c
index 3f9d368..7a1c886 100644
--- a/kernel/sched/core.c
+++ b/kernel/sched/core.c
@@ -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
--
1.7.4.1
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