path: root/kernel/sched_fair.c
diff options
authorSrivatsa Vaddagiri <vatsa@linux.vnet.ibm.com>2008-01-25 21:07:59 +0100
committerIngo Molnar <mingo@elte.hu>2008-01-25 21:07:59 +0100
commitec2c507fe8c8fa3c04fc6cb99a382a965c477379 (patch)
treef139f738ba08576318ec09047148cdc7ae33ac9b /kernel/sched_fair.c
parentsched: group scheduling code cleanup (diff)
sched: group scheduling, minor fixes
Minor bug fixes for the group scheduler: - Use a mutex to serialize add/remove of task groups and also when changing shares of a task group. Use the same mutex when printing cfs_rq debugging stats for various task groups. - Use list_for_each_entry_rcu in for_each_leaf_cfs_rq macro (when walking task group list) Signed-off-by: Srivatsa Vaddagiri <vatsa@linux.vnet.ibm.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to '')
1 files changed, 3 insertions, 1 deletions
diff --git a/kernel/sched_fair.c b/kernel/sched_fair.c
index da7c061e7206..0c5fdce67228 100644
--- a/kernel/sched_fair.c
+++ b/kernel/sched_fair.c
@@ -690,7 +690,7 @@ static inline struct cfs_rq *cpu_cfs_rq(struct cfs_rq *cfs_rq, int this_cpu)
/* Iterate thr' all leaf cfs_rq's on a runqueue */
#define for_each_leaf_cfs_rq(rq, cfs_rq) \
- list_for_each_entry(cfs_rq, &rq->leaf_cfs_rq_list, leaf_cfs_rq_list)
+ list_for_each_entry_rcu(cfs_rq, &rq->leaf_cfs_rq_list, leaf_cfs_rq_list)
/* Do the two (enqueued) entities belong to the same group ? */
static inline int
@@ -1132,7 +1132,9 @@ static void print_cfs_stats(struct seq_file *m, int cpu)
print_cfs_rq(m, cpu, &cpu_rq(cpu)->cfs);
+ lock_task_group_list();
for_each_leaf_cfs_rq(cpu_rq(cpu), cfs_rq)
print_cfs_rq(m, cpu, cfs_rq);
+ unlock_task_group_list();