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authorPaul E. McKenney <paulmck@linux.vnet.ibm.com>2009-08-15 18:53:50 +0200
committerIngo Molnar <mingo@elte.hu>2009-08-15 19:02:09 +0200
commitb612ba804b8a656333013ad2ee96fb2377df5dbb (patch)
treefbfcb07be4b964f3a512109ec2fa5880cf92e99c /kernel/rcupreempt_trace.c
parentrcu: Make preemptable RCU scan all CPUs when summing RCU counters (diff)
downloadlinux-b612ba804b8a656333013ad2ee96fb2377df5dbb.tar.xz
linux-b612ba804b8a656333013ad2ee96fb2377df5dbb.zip
rcu: Make rcupreempt_trace.c look at offline CPUs
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> Cc: laijs@cn.fujitsu.com Cc: dipankar@in.ibm.com Cc: josht@linux.vnet.ibm.com Cc: akpm@linux-foundation.org Cc: mathieu.desnoyers@polymtl.ca Cc: dvhltc@us.ibm.com Cc: niv@us.ibm.com Cc: peterz@infradead.org Cc: rostedt@goodmis.org Cc: hugh.dickins@tiscali.co.uk Cc: benh@kernel.crashing.org LKML-Reference: <12503552313921-git-send-email-> Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'kernel/rcupreempt_trace.c')
-rw-r--r--kernel/rcupreempt_trace.c5
1 files changed, 3 insertions, 2 deletions
diff --git a/kernel/rcupreempt_trace.c b/kernel/rcupreempt_trace.c
index 7c2665cac172..11640346a507 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),