In some cases, we actually set FREEING flag while the lease is on the timer list. So we must skip those leases.  In addition, this also makes it possible to use more than one timer threads for the job.
In some cases, we actually set FREEING flag while the lease is on the
timer list. So we must skip those leases.  In addition, this also makes
it possible to use more than one timer threads for the job.

pscedu/slash2-stable,pscedu/slash2-stable,pscedu/slash2-stable,pscedu/slash2-stable,pscedu/slash2-stable,pscedu/slash2-stable,pscedu/slash2-stable