From: Michael Wang <wang...@linux.vnet.ibm.com>
Add the variables we need for the implementation of dynamical domain
flags.
Signed-off-by: Michael Wang <wang...@linux.vnet.ibm.com>
---
include/linux/sched.h | 22 ++++++++++++++++++++++
kernel/cpuset.c | 7 +++++++
2 files changed, 29 insertions(+), 0 deletions(-)
diff --git a/include/linux/sched.h b/include/linux/sched.h
index ddc1225..9164309 100644
--- a/include/linux/sched.h
+++ b/include/linux/sched.h
@@ -922,8 +922,30 @@ static inline unsigned int group_first_cpu(struct
sched_group *group)
return cpumask_first(sched_group_cpus(group));
}
+enum {
+#ifdef CONFIG_SCHED_SMT
+ SMT_DDF,
+#endif
+#ifdef CONFIG_SCHED_MC
+ MC_DDF,
+#endif
+#ifdef CONFIG_SCHED_BOOK
+ BOOK_DDF,
+#endif
+ CPU_DDF,
+ MAX_DDF,
+};
+
struct sched_domain_attr {
int relax_domain_level;
+ /*
+ * dynamical domain flag array cover all level, only useful if
+ * enable_ddf is 1.
+ * the static domain flags will be replaced by ddf on each domain
+ * level dynamically in set_domain_attribute.
+ */
+ u64 ddf[MAX_DDF];
+ int enable_ddf;
};
#define SD_ATTR_INIT (struct sched_domain_attr) { \
diff --git a/kernel/cpuset.c b/kernel/cpuset.c
index 0cbc631..35fb585 100644
--- a/kernel/cpuset.c
+++ b/kernel/cpuset.c
@@ -105,6 +105,13 @@ struct cpuset {
/* for custom sched domain */
int relax_domain_level;
+ /*
+ * dynamical domain flag configuration for cpuset, see struct
+ * sched_domain_attr for detail.
+ */
+ u64 ddf[MAX_DDF];
+ int enable_ddf;
+
/* used for walking a cpuset hierarchy */
struct list_head stack_list;
};
--
1.7.4.1
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