https://bugzilla.kernel.org/show_bug.cgi?id=198511 --- Comment #30 from Barto (mister.freeman@xxxxxxxxxxx) --- (In reply to Christian König from comment #26) > As a band aid I will try to fix our algorithm when pages are freed again, > but in general the driver stack or application should be fixed to not do > that. > > Probably best if you open up a bug report on http://bugs.freedesktop.org/ so > that somebody can investigate what userspace is doing here. Did you progress about this ttm algorithm ? I filmed my screen with a smartphone in order to capture the problem : https://www.youtube.com/watch?v=YqtleU5YBlA at first I filmed with kernel 4.14.14, then with kernel 4.15.2, we can see on the second attempt that the vertical scrool of the credits are not as good as with kernel 4.14.14 configuration : configuration used : - radeon hd4650 pci-e - CPU intel core 2 quad Q9650 - archlinux 64 bits - kernel 4.14.14 and 4.15.2-2 - firefox the youtube video for the test : https://youtu.be/AXL4r30VgSE?t=19m2s in fact the performance loss can occur at 720p@30fps on some situation, for example the vertical scroll of the credits, there are noticeable lags for the scrolling of the credits, though the rest of the video seems smooth, it would be interesting to have a kernel boot parameter in order to restore the previous ttm algorithm -- You are receiving this mail because: You are watching the assignee of the bug. _______________________________________________ dri-devel mailing list dri-devel@xxxxxxxxxxxxxxxxxxxxx https://lists.freedesktop.org/mailman/listinfo/dri-devel
