__collapse_huge_page_isolate() was not triggered

thp_test started to read at 16:03. /var/log/kernel.log shows nothing printed out at the time.
It is last results at 15:56.
[Prş Oca 15 15:51:41 2015] snd_hda_intel 0000:01:00.1: Enabling via VGA-switcheroo
[Prş Oca 15 15:51:41 2015] snd_hda_intel 0000:01:00.1: irq 29 for MSI/MSI-X
[Prş Oca 15 15:51:46 2015] snd_hda_intel 0000:01:00.1: Disabling via VGA-switcheroo
[Prş Oca 15 15:51:48 2015] huge_memory: ptes released
[Prş Oca 15 15:52:48 2015] huge_memory: ptes released
[Prş Oca 15 15:53:38 2015] huge_memory: ptes released
[Prş Oca 15 15:54:28 2015] huge_memory: ptes released
[Prş Oca 15 15:54:48 2015] huge_memory: ptes released
[Prş Oca 15 15:55:28 2015] huge_memory: ptes released
[Prş Oca 15 15:56:18 2015] huge_memory: ptes released
[Prş Oca 15 15:56:28 2015] huge_memory: ptes released

When swapeed out:
/proc/meminfo:
AnonPages:       1795636 kB
AnonHugePages:   1646592 kB

/proc/pid/smaps:
Anonymous:        167160 kB
AnonHugePages:    163840 kB
Swap:             632844 kB

When swapped in:
/proc/meminfo:
AnonPages:       2431548 kB
AnonHugePages:   1646592 kB

/proc/pid/smaps:
Anonymous:        800004 kB
AnonHugePages:    163840 kB
Swap:                  0 kB