linux-kernel - [tip:core/rcu] rcu: Add rnp->blocked

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Date:	Thu, 15 Oct 2009 09:25:22 GMT
From:	"tip-bot for Paul E. McKenney" <paulmck@...ux.vnet.ibm.com>
To:	linux-tip-commits@...r.kernel.org
Cc:	linux-kernel@...r.kernel.org, paulmck@...ux.vnet.ibm.com,
	hpa@...or.com, mingo@...hat.com, josh@...htriplett.org,
	tglx@...utronix.de, mingo@...e.hu
Subject: [tip:core/rcu] rcu: Add rnp->blocked_tasks to tracing

Commit-ID:  3397e040dfacbb303498ced1baa96be983dcea06
Gitweb:     http://git.kernel.org/tip/3397e040dfacbb303498ced1baa96be983dcea06
Author:     Paul E. McKenney <paulmck@...ux.vnet.ibm.com>
AuthorDate: Wed, 14 Oct 2009 16:36:38 -0700
Committer:  Ingo Molnar <mingo@...e.hu>
CommitDate: Thu, 15 Oct 2009 11:20:22 +0200

rcu: Add rnp->blocked_tasks to tracing

Signed-off-by: Paul E. McKenney <paulmck@...ux.vnet.ibm.com>
Cc: laijs@...fujitsu.com
Cc: dipankar@...ibm.com
Cc: mathieu.desnoyers@...ymtl.ca
Cc: dvhltc@...ibm.com
Cc: niv@...ibm.com
Cc: peterz@...radead.org
Cc: rostedt@...dmis.org
Cc: Valdis.Kletnieks@...edu
Cc: dhowells@...hat.com
Cc: npiggin@...e.de
Cc: jens.axboe@...cle.com
Cc: Josh Triplett <josh@...htriplett.org>
LKML-Reference: <20091014233638.GE6763@...ux.vnet.ibm.com>
Signed-off-by: Ingo Molnar <mingo@...e.hu>
 kernel/rcutree_trace.c |    8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)
---
 kernel/rcutree_trace.c |    8 ++++++--
 1 files changed, 6 insertions(+), 2 deletions(-)

diff --git a/kernel/rcutree_trace.c b/kernel/rcutree_trace.c
index 4b31c77..1984cdc 100644
--- a/kernel/rcutree_trace.c
+++ b/kernel/rcutree_trace.c
@@ -155,12 +155,14 @@ static const struct file_operations rcudata_csv_fops = {
 
 static void print_one_rcu_state(struct seq_file *m, struct rcu_state *rsp)
 {
+	long gpnum;
 	int level = 0;
 	struct rcu_node *rnp;
 
+	gpnum = rsp->gpnum;
 	seq_printf(m, "c=%ld g=%ld s=%d jfq=%ld j=%x "
 		      "nfqs=%lu/nfqsng=%lu(%lu) fqlh=%lu oqlen=%ld\n",
-		   rsp->completed, rsp->gpnum, rsp->signaled,
+		   rsp->completed, gpnum, rsp->signaled,
 		   (long)(rsp->jiffies_force_qs - jiffies),
 		   (int)(jiffies & 0xffff),
 		   rsp->n_force_qs, rsp->n_force_qs_ngp,
@@ -171,8 +173,10 @@ static void print_one_rcu_state(struct seq_file *m, struct rcu_state *rsp)
 			seq_puts(m, "\n");
 			level = rnp->level;
 		}
-		seq_printf(m, "%lx/%lx %d:%d ^%d    ",
+		seq_printf(m, "%lx/%lx %c>%c %d:%d ^%d    ",
 			   rnp->qsmask, rnp->qsmaskinit,
+			   "T."[list_empty(&rnp->blocked_tasks[gpnum & 1])],
+			   "T."[list_empty(&rnp->blocked_tasks[!(gpnum & 1)])],
 			   rnp->grplo, rnp->grphi, rnp->grpnum);
 	}
 	seq_puts(m, "\n");
--
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