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rcu-tasks: Make grace-period-age message human-readable 

This commit adds a few words to the informative message that appears
every ten seconds in RCU Tasks and RCU Tasks Trace grace periods.
This message currently reads as follows:

rcu_tasks_wait_gp: rcu_tasks grace period 1046 is 10088 jiffies old.

After this change, it provides additional context, instead reading
as follows:

rcu_tasks_wait_gp: rcu_tasks grace period number 1046 (since boot) is 10088 jiffies old.

Reported-by: Alexei Starovoitov <ast@kernel.org>
Signed-off-by: Paul E. McKenney <paulmck@kernel.org>
This commit is contained in:
Paul E. McKenney 2022-09-29 11:58:10 -07:00
parent fdbdb86845
commit df83fff758
1 changed files with 1 additions and 1 deletions
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2
kernel/rcu/tasks.h
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@ -728,7 +728,7 @@ static void rcu_tasks_wait_gp(struct rcu_tasks *rtp)
if (rtsi > 0 && !reported && time_after(j, lastinfo + rtsi)) {
lastinfo = j;
rtsi = rtsi * rcu_task_stall_info_mult;
pr_info("%s: %s grace period %lu is %lu jiffies old.\n",
pr_info("%s: %s grace period number %lu (since boot) is %lu jiffies old.\n",
__func__, rtp->kname, rtp->tasks_gp_seq, j - rtp->gp_start);
}
}