Comment # 5 on bug 58667 from Thomas Rohloff

I should really read before I click save, sorry. Here again:

"Is this a regression?  Does it happen with older versions of mesa or kernel?"
Not that I know about.

"May also be related to bug 58354."
Do you have a link to the patch noted there ("drm/radeon: use DMA engine for VM
page table updates on cayman/TN") ? I would love to try to revert this patch
and test it, but I'm unable to google it.