From 5973e5b954848c63855a357ad4ff39882e3904f7 Mon Sep 17 00:00:00 2001 From: Peter Zijlstra Date: Fri, 25 Jan 2008 21:08:34 +0100 Subject: [PATCH] sched: fix: don't take a mutex from interrupt context print_cfs_stats is callable from interrupt context (sysrq), hence it should not take mutexes. Change it to use RCU since the task group data is RCU freed anyway. Signed-off-by: Peter Zijlstra Signed-off-by: Ingo Molnar --- kernel/sched_fair.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/kernel/sched_fair.c b/kernel/sched_fair.c index 1b3b40ad7c..45ff4e9411 100644 --- a/kernel/sched_fair.c +++ b/kernel/sched_fair.c @@ -1434,9 +1434,9 @@ static void print_cfs_stats(struct seq_file *m, int cpu) #ifdef CONFIG_FAIR_GROUP_SCHED print_cfs_rq(m, cpu, &cpu_rq(cpu)->cfs); #endif - lock_task_group_list(); + rcu_read_lock(); for_each_leaf_cfs_rq(cpu_rq(cpu), cfs_rq) print_cfs_rq(m, cpu, cfs_rq); - unlock_task_group_list(); + rcu_read_unlock(); } #endif -- 2.39.5