On Fri, Jun 13, 2025 at 3:38 PM <mach...@disroot.org> wrote: > > Hi, > sorry for the delay. > Besides less time, I had to make myself familiar with bisecting and > again kernel compiling. Last time I compiled the kernel myself was > around 2010 I think. > > Anyway it seems I found the bad commit. The result after bisecting 10 > commits is: > > a53d959fe660341788cb8dbc3ac3330d90a09ecf is the first bad commit > commit a53d959fe660341788cb8dbc3ac3330d90a09ecf > Author: Christian König <christian.koe...@amd.com> > Date: Thu Mar 20 14:46:18 2025 +0100 > > drm/amdgpu: immediately use GTT for new allocations > > commit a755906fb2b8370c43e91ba437ae1b3e228e8b02 upstream. > > Only use GTT as a fallback if we already have a backing store. This > prevents evictions when an application constantly allocates and > frees new > memory. > > Partially fixes > https://gitlab.freedesktop.org/drm/amd/-/issues/3844#note_2833985. > > Signed-off-by: Christian König <christian.koe...@amd.com> > Fixes: 216c1282dde3 ("drm/amdgpu: use GTT only as fallback for > VRAM|GTT") > Acked-by: Alex Deucher <alexander.deuc...@amd.com> > Signed-off-by: Alex Deucher <alexander.deuc...@amd.com> > Cc: sta...@vger.kernel.org > Signed-off-by: Greg Kroah-Hartman <gre...@linuxfoundation.org> > > drivers/gpu/drm/amd/amdgpu/amdgpu_object.c | 4 ++-- > 1 file changed, 2 insertions(+), 2 deletions(-)
Unfortunately reverting that commit will reintroduce a similar performance issue for lots of other uses. See: https://gitlab.freedesktop.org/drm/amd/-/issues/3844#note_2827990 for a description of the fundemental problem. Alex > > Marion > > > Am 2025-05-08 15:18, schrieb Alex Deucher: > > On Thu, May 8, 2025 at 9:13 AM <mach...@disroot.org> wrote: > >> > >> Hello kernel/driver developers, > >> > >> I hope, with my information it's possible to find a bug/problem in the > >> kernel. Otherwise I am sorry, that I disturbed you. > >> I only use LTS kernels, but I can narrow it down to a hand full of > >> them, > >> where it works. > >> > >> The PC: Manjaro Stable/Cinnamon/X11/AMD Ryzen 5 2600/Radeon HD > >> 7790/8GB > >> RAM > >> I already asked the Manjaro community, but with no luck. > >> > >> The game: Hellpoint (GOG Linux latest version, Unity3D-Engine v2021), > >> uses vulkan > >> > >> --- > >> > >> I came a long road of kernels. I had many versions of 5.4, 5.10, 5.15, > >> 6.1 and 6.6 and and the game was always unplayable, because the frames > >> where around 1fps (performance of PC is not the problem). > >> I asked the mesa and cinnamon team for help in the past, but also with > >> no luck. > >> It never worked, till on 2025-03-29 when I installed 6.12.19 for the > >> first time and it worked! > >> > >> But it only worked with 6.12.19, 6.12.20 and 6.12.21 > >> When I updated to 6.12.25, it was back to unplayable. > > > > Can you bisect to see what fixed it in 6.12.19 or what broke it in > > 6.12.25? For example if it was working in 6.12.21 and not working in > > 6.12.25, you can bisect between 6.12.21 and .25. > > > > Alex > > > >> > >> For testing I installed 6.14.4 with the same result. It doesn't work. > >> > >> I also compared file /proc/config.gz of both kernels (6.12.21 <> > >> 6.14.4), but can't seem to see drastic changes to the graphical part. > >> > >> I presume it has something to do with amdgpu. > >> > >> If you need more information, I would be happy to help. > >> > >> Kind regards, > >> Marion
