[PATCH -tip/core/rcu 5/6] Make rcupreempt_trace.c look at offline CPUs.

Paul E. McKenney
2009-08-15T16:53:54Z

From: Paul E. McKenney <paulmck@linux.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@linux.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