From: Michael Wang <wang...@linux.vnet.ibm.com>
Add the fundamental functions which will help to record the status of
dynamical domain flags for cpuset.
Signed-off-by: Michael Wang <wang...@linux.vnet.ibm.com>
---
kernel/cpuset.c | 31 +++++++++++++++++++++++++++++++
1 files changed, 31 insertions(+), 0 deletions(-)
diff --git a/kernel/cpuset.c b/kernel/cpuset.c
index def8080..066c61c 100644
--- a/kernel/cpuset.c
+++ b/kernel/cpuset.c
@@ -1189,6 +1189,37 @@ static int update_relax_domain_level(struct cpuset *cs,
s64 val)
}
/*
+ * update the ddf of cs according to level and rebuild domain
+ * if ddf enabled.
+ */
+static int update_ddf(int level, struct cpuset *cs, u64 val)
+{
+ if (!is_sched_load_balance(cs))
+ return -EINVAL;
+
+ cs->ddf[level] = val;
+ if (cs->enable_ddf)
+ async_rebuild_sched_domains();
+
+ return 0;
+}
+
+/* enable or disable ddf supporting and rebuild domain */
+static int enable_ddf(struct cpuset *cs, u64 val)
+{
+ if (!is_sched_load_balance(cs))
+ return -EINVAL;
+
+ if ((val != 0 && val != 1) || cs->enable_ddf == val)
+ return -EINVAL;
+
+ cs->enable_ddf = val;
+ async_rebuild_sched_domains();
+
+ return 0;
+}
+
+/*
* cpuset_change_flag - make a task's spread flags the same as its cpuset's
* @tsk: task to be updated
* @scan: struct cgroup_scanner containing the cgroup of the task
--
1.7.4.1
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