udmabuf with huge pages

[Xaver Hugl]

Hi,

For distributions that have
CONFIG_TRANSPARENT_HUGEPAGE_SHMEM_HUGE_WITHIN_SIZE enabled in their
kernel builds, I recommend backporting
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=5bf888673e0dda5a53220fa0c4956271a46c353c.

The bug fixed by that commit triggers glitches with Qt applications in
Plasma 6.7. You can alternatively disable the feature in KWin by
default with https://invent.kde.org/plasma/kwin/-/commit/5bc20cf10f3b54fd4f105b2264beaa6f04cc54e0
until the fix reaches your kernel(s) , but other software is also
affected, so backporting the fix soon would be good either way.

- Xaver