Close Zink's emulated GEM handles on KGSL (Xwayland dma-buf leak)
The session preload hands out GEM handles on the KGSL render node by
duplicating the dma-buf descriptor, and released them only through
drmCloseBufferHandle. Zink gives handles back with
drmIoctl(DRM_IOCTL_GEM_CLOSE) instead, which KGSL refuses, so every
duplicated descriptor stayed open and kept its buffer alive.
Xwayland asks for a handle for each buffer it imports through gbm. With
"Force game windows fullscreen" fighting a game's own resolution
(DiRT 3 at 1280x720), the game recreates its swapchain many times a
second and Xwayland piled up ~2,000 old swapchain images (6+ GB) in
seconds until Android killed the session. A preload trace on the device
put 2,090 of 2,118 open dma-buf descriptors in Xwayland on
drmPrimeFDToHandle called from Zink.
Handle GEM_CLOSE on the KGSL node in drmIoctl, and check the three DRM
symbols are exported in CI.
Co-authored-by: The412Banner <the412banner@users.noreply.github.com>
Lifts Bannerlator's Linux/gamescope runtime out into an app of its own: the
Wayland compositor, the proot session, the runtime installer, the fake-evdev
controller path and the PulseAudio server, with none of the Wine, container or
store machinery around them.
One activity installs the runtime from the same winlator-contents catalog and a
second one runs the session: compositor on a SurfaceView, gamescope and Valve's
native arm64 client under proot, a physical pad republished into the fake-input
rings, and the session's milestones on screen until the first frame arrives.
Kurt Himebauch