rcu: Remove self-stack-trace when all quiescent states seen

When all quiescent states have been seen, it is normally the grace-period
kthread that is in trouble.  Although the existing stack trace from
the current CPU might possibly provide useful information, experience
indicates that there is too much noise for this to be worthwhile.

This commit therefore removes this stack trace from the output.

Signed-off-by: Paul E. McKenney <paulmck@kernel.org>

diff --git a/kernel/rcu/tree_stall.h b/kernel/rcu/tree_stall.h
index 4da41a613ece49840475bd891baf0a28d4fc67ae..535762b0754366c046748cd47829a278785a111c 100644 (file)
--- a/kernel/rcu/tree_stall.h
+++ b/kernel/rcu/tree_stall.h
@@ -440,8 +440,6 @@ static void print_other_cpu_stall(unsigned long gp_seq)
                               rcu_state.name, j - gpa, j, gpa,
                               READ_ONCE(jiffies_till_next_fqs),
                               rcu_get_root()->qsmask);
-                       /* In this case, the current CPU might be at fault. */
-                       sched_show_task(current);
                }
        }
        /* Rewrite if needed in case of slow consoles. */