AcoSail/kernel_optimize_test
8
0
Fork 0
forked from luck/tmp_suning_uos_patched
Code Pull Requests Activity

rcu: Add grace-period information to RCU CPU stall warnings

Browse Source 
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>
This commit is contained in:
Paul E. McKenney 2012-09-21 14:15:05 -07:00 committed by Paul E. McKenney
parent b637a328bd
commit eee0588261
1 changed files with 5 additions and 3 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

8
kernel/rcutree.c
View File

@ -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();