From: "Paul E. McKenney" <paul.mcken...@linaro.org>
This commit causes the last grace period started and completed to be
printed on RCU CPU stall warning messages in order to aid diagnosis.
Signed-off-by: Paul E. McKenney <paul.mcken...@linaro.org>
Signed-off-by: Paul E. McKenney <paul...@linux.vnet.ibm.com>
---
kernel/rcutree.c | 8 +++++---
1 files changed, 5 insertions(+), 3 deletions(-)
diff --git a/kernel/rcutree.c b/kernel/rcutree.c
index e785387..8f4de3a 100644
--- a/kernel/rcutree.c
+++ b/kernel/rcutree.c
@@ -947,8 +947,9 @@ static void print_other_cpu_stall(struct rcu_state *rsp)
raw_spin_unlock_irqrestore(&rnp->lock, flags);
print_cpu_stall_info_end();
- printk(KERN_CONT "(detected by %d, t=%ld jiffies)\n",
- smp_processor_id(), (long)(jiffies - rsp->gp_start));
+ pr_cont("(detected by %d, t=%ld jiffies, g=%lu, c=%lu)\n",
+ smp_processor_id(), (long)(jiffies - rsp->gp_start),
+ rsp->gpnum, rsp->completed);
if (ndetected == 0)
printk(KERN_ERR "INFO: Stall ended before state dump start\n");
else if (!trigger_all_cpu_backtrace())
@@ -975,7 +976,8 @@ static void print_cpu_stall(struct rcu_state *rsp)
print_cpu_stall_info_begin();
print_cpu_stall_info(rsp, smp_processor_id());
print_cpu_stall_info_end();
- printk(KERN_CONT " (t=%lu jiffies)\n", jiffies - rsp->gp_start);
+ pr_cont(" (t=%lu jiffies g=%lu c=%lu)\n",
+ jiffies - rsp->gp_start, rsp->gpnum, rsp->completed);
if (!trigger_all_cpu_backtrace())
dump_stack();
--
1.7.8
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