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| author | Paul E. McKenney <paulmck@linux.vnet.ibm.com> | 2014-12-10 16:45:13 +0100 |
|---|---|---|
| committer | Paul E. McKenney <paulmck@linux.vnet.ibm.com> | 2015-01-06 20:02:53 +0100 |
| commit | 6cd534ef8bfe422a5a847b953d1039841509c374 (patch) | |
| tree | dbbac5df276f7e2e7379dcb66d8a690cbed6e261 /kernel/rcu/tree.c | |
| parent | rcu: Revert "Allow post-unlock reference for rt_mutex" to avoid priority-inve... (diff) | |
| download | linux-6cd534ef8bfe422a5a847b953d1039841509c374.tar.xz linux-6cd534ef8bfe422a5a847b953d1039841509c374.zip | |
rcu: Don't scan root rcu_node structure for stalled tasks
Now that blocked tasks are no longer migrated to the root rcu_node
structure, there is no need to scan the root rcu_node structure for
blocked tasks stalling the current grace period. This commit therefore
removes this scan.
Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Diffstat (limited to 'kernel/rcu/tree.c')
| -rw-r--r-- | kernel/rcu/tree.c | 9 |
1 files changed, 0 insertions, 9 deletions
diff --git a/kernel/rcu/tree.c b/kernel/rcu/tree.c index 24d3c67f7be7..4ed2c2842103 100644 --- a/kernel/rcu/tree.c +++ b/kernel/rcu/tree.c @@ -1107,15 +1107,6 @@ static void print_other_cpu_stall(struct rcu_state *rsp) raw_spin_unlock_irqrestore(&rnp->lock, flags); } - /* - * Now rat on any tasks that got kicked up to the root rcu_node - * due to CPU offlining. - */ - rnp = rcu_get_root(rsp); - raw_spin_lock_irqsave(&rnp->lock, flags); - ndetected += rcu_print_task_stall(rnp); - raw_spin_unlock_irqrestore(&rnp->lock, flags); - print_cpu_stall_info_end(); for_each_possible_cpu(cpu) totqlen += per_cpu_ptr(rsp->rda, cpu)->qlen; |