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| author |   Peter Zijlstra <a.p.zijlstra@chello.nl> | 2008-01-25 21:08:34 +0100 |
|---|---|---|
| committer |   Ingo Molnar <mingo@elte.hu> | 2008-01-25 21:08:34 +0100 |
| commit | 5973e5b954848c63855a357ad4ff39882e3904f7 (patch) | |
| tree | e88c2d900a228401cefc7e144bf5628434df18ac /kernel/sched_fair.c | |
| parent | sched: print backtrace of running tasks too (diff) | |
| download | linux-dev-5973e5b954848c63855a357ad4ff39882e3904f7.tar.xz linux-dev-5973e5b954848c63855a357ad4ff39882e3904f7.zip | |
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 <a.p.zijlstra@chello.nl>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'kernel/sched_fair.c')
| -rw-r--r-- | kernel/sched_fair.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/kernel/sched_fair.c b/kernel/sched_fair.c index 1b3b40ad7c54..45ff4e9411e0 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 |