Messages in this thread Patch in this message | | | From | "Paul E. McKenney" <> | Subject | [PATCH tip/core/rcu 2/4] rcu: Add grace-period information to RCU CPU stall warnings | Date | Tue, 30 Oct 2012 09:46:47 -0700 |
| |
From: "Paul E. McKenney" <paul.mckenney@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.mckenney@linaro.org> Signed-off-by: Paul E. McKenney <paulmck@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
| |