On Wed, Aug 07, 2013 at 06:25:03PM +0800, Lai Jiangshan wrote:
> Signed-off-by: Lai Jiangshan <la...@cn.fujitsu.com>
> ---
> kernel/rcutree.h | 1 +
> kernel/rcutree_plugin.h | 1 +
> kernel/rcutree_trace.c | 1 +
> 3 files changed, 3 insertions(+), 0 deletions(-)
>
> diff --git a/kernel/rcutree.h b/kernel/rcutree.h
> index 4a39d36..a5e9643 100644
> --- a/kernel/rcutree.h
> +++ b/kernel/rcutree.h
> @@ -290,6 +290,7 @@ struct rcu_data {
> unsigned long n_force_qs_snap;
> /* did other CPU force QS recently? */
> long blimit; /* Upper limit on a processed batch */
> + unsigned long n_defer_special;/* # of deferred _special() */
>
> /* 3) dynticks interface. */
> struct rcu_dynticks *dynticks; /* Shared per-CPU dynticks state. */
> diff --git a/kernel/rcutree_plugin.h b/kernel/rcutree_plugin.h
> index c9ff9f1..d828eec 100644
> --- a/kernel/rcutree_plugin.h
> +++ b/kernel/rcutree_plugin.h
> @@ -396,6 +396,7 @@ void rcu_read_unlock_special(struct task_struct *t, bool
> unlock)
> * is still unlikey to be true.
> */
> if (unlikely(unlock && irqs_disabled_flags(flags))) {
> + this_cpu_ptr(&rcu_preempt_data)->n_defer_special++;
> set_need_resched();
> local_irq_restore(flags);
> return;
> diff --git a/kernel/rcutree_trace.c b/kernel/rcutree_trace.c
> index cf6c174..17d8b2c 100644
> --- a/kernel/rcutree_trace.c
> +++ b/kernel/rcutree_trace.c
> @@ -149,6 +149,7 @@ static void print_one_rcu_data(struct seq_file *m, struct
> rcu_data *rdp)
> seq_printf(m, " ci=%lu nci=%lu co=%lu ca=%lu\n",
The above "\n" needs to be removed. (Fixed while queueing.)
Thanx, Paul
> rdp->n_cbs_invoked, rdp->n_nocbs_invoked,
> rdp->n_cbs_orphaned, rdp->n_cbs_adopted);
> + seq_printf(m, " ds=%lu\n", rdp->n_defer_special);
> }
>
> static int show_rcudata(struct seq_file *m, void *v)
> --
> 1.7.4.4
>
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