DRM-current-kmod is still a problem at r353339

[Masachika ISHIZUKA]

>> Another (semi-fixed!) data point -- I can confirm that with if
>> (vm_page_sleep_if_busy(page, "linuxkpi"))
>>  -> if (!vm_page_busy_acquire(page, VM_ALLOC_WAITFAIL)) change and
>> mjg@'s earlier patch at
>> https://people.freebsd.org/~mjg/pmap-fict-invl.diff (please commit it) ,
>> the latest drm-v5.0 branch of drm-current-kmod worked just fine with
>> Intel HD Graphics P630 on Lenovo P51.

  Thank you very much.
  Now, it is good working r353722M(1300053) on 3 machines.

(1) DELL Vostro 3267 desktop (core i5-7500)
  Both patches are required.

(2) DELL Vostro 3568 notebook (Celeron 3865U)
  Both patches are required.

(3) DELL XPS 12 9Q33 notebook (core i7-4500U)
  At least mjg@'s pmap-fict-invl patch is required.
-- 
Masachika ISHIZUKA