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| author | Paul E. McKenney <paulmck@linux.vnet.ibm.com> | 2018-01-11 12:08:20 -0800 |
|---|---|---|
| committer | Paul E. McKenney <paulmck@linux.vnet.ibm.com> | 2018-02-20 16:10:29 -0800 |
| commit | d07aee2c035e04dce11209a870b48091a47bd04a (patch) | |
| tree | 4edd492d889e362dc37de61ab1f885e4c1589b1b /kernel/rcu | |
| parent | d62df57370a5215fbf1b088d2ee51fa5d69bd0c3 (diff) | |
| download | linux-d07aee2c035e04dce11209a870b48091a47bd04a.tar.bz2 | |
rcu: More clearly identify grace-period kthread stack dump
It is not always obvious that the stack dump from a starved grace-period
kthread isn't instead that of a CPU stalling the current grace period.
This commit therefore adds a pr_err() flagging these dumps.
Reported-by: Peter Zijlstra <peterz@infradead.org>
Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Diffstat (limited to 'kernel/rcu')
| -rw-r--r-- | kernel/rcu/tree.c | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/kernel/rcu/tree.c b/kernel/rcu/tree.c index 86fc087c7777..4d7c727020f0 100644 --- a/kernel/rcu/tree.c +++ b/kernel/rcu/tree.c @@ -1350,6 +1350,7 @@ static void rcu_check_gp_kthread_starvation(struct rcu_state *rsp) rsp->gp_kthread ? rsp->gp_kthread->state : ~0, rsp->gp_kthread ? task_cpu(rsp->gp_kthread) : -1); if (rsp->gp_kthread) { + pr_err("RCU grace-period kthread stack dump:\n"); sched_show_task(rsp->gp_kthread); wake_up_process(rsp->gp_kthread); } |