linux-kernel - [PATCH -tip/core/rcu 5/6] Make rcupreempt

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Date:	Sat, 15 Aug 2009 09:53:50 -0700
From:	"Paul E. McKenney" <paulmck@...ux.vnet.ibm.com>
To:	linux-kernel@...r.kernel.org
Cc:	mingo@...e.hu, laijs@...fujitsu.com, dipankar@...ibm.com,
	josht@...ux.vnet.ibm.com, akpm@...ux-foundation.org,
	mathieu.desnoyers@...ymtl.ca, dvhltc@...ibm.com, niv@...ibm.com,
	tglx@...utronix.de, peterz@...radead.org, rostedt@...dmis.org,
	hugh.dickins@...cali.co.uk, benh@...nel.crashing.org,
	"Paul E. McKenney" <paulmck@...ux.vnet.ibm.com>
Subject: [PATCH -tip/core/rcu 5/6] Make rcupreempt_trace.c look at offline CPUs.

From: Paul E. McKenney <paulmck@...ux.vnet.ibm.com>

Given that offline CPUs can now have non-zero counters, we need to
dump counters for offline CPUs as well as for online CPUs.

Signed-off-by: Paul E. McKenney <paulmck@...ux.vnet.ibm.com>
---
 kernel/rcupreempt_trace.c |    5 +++--
 1 files changed, 3 insertions(+), 2 deletions(-)

diff --git a/kernel/rcupreempt_trace.c b/kernel/rcupreempt_trace.c
index 7c2665c..1164034 100644
--- a/kernel/rcupreempt_trace.c
+++ b/kernel/rcupreempt_trace.c
@@ -236,12 +236,13 @@ static ssize_t rcuctrs_read(struct file *filp, char __user *buffer,
 
 	cnt += snprintf(&rcupreempt_trace_buf[cnt], RCUPREEMPT_TRACE_BUF_SIZE,
 				"CPU last cur F M\n");
-	for_each_online_cpu(cpu) {
+	for_each_possible_cpu(cpu) {
 		long *flipctr = rcupreempt_flipctr(cpu);
 		cnt += snprintf(&rcupreempt_trace_buf[cnt],
 				RCUPREEMPT_TRACE_BUF_SIZE - cnt,
-					"%3d %4ld %3ld %d %d\n",
+					"%3d%c %4ld %3ld %d %d\n",
 			       cpu,
+			       cpu_is_offline(cpu) ? '!' : ' ',
 			       flipctr[!f],
 			       flipctr[f],
 			       rcupreempt_flip_flag(cpu),
-- 
1.5.2.5

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