Every 1,0s: cat /sys/kernel/debug/dri/0/ttm_page_pool                                                                                                                                              linux-qz0r.site: Thu Jul 27 00:25:37 2017

  pool      refills   pages freed     size
    wc            0             0        0
    uc            0             0        0
wc dma            0             0        0
uc dma            0             0        0