soc: apple: rtkit: Use high prio work queue

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[ Upstream commit 22af2fac88 ]

rtkit messages as communication with the DCP firmware for framebuffer
swaps or input events are time critical so use WQ_HIGHPRI to prevent
user space CPU load to increase latency.
With kwin_wayland 6's explicit sync mode user space load was able to
delay the IOMFB rtkit communication enough to miss vsync for surface
swaps. Minimal test scenario is constantly resizing a glxgears
Xwayland window.

Signed-off-by: Janne Grunau <j@jannau.net>
Reviewed-by: Alyssa Rosenzweig <alyssa@rosenzweig.io>
Link: https://lore.kernel.org/r/20250226-apple-soc-misc-v2-3-c3ec37f9021b@svenpeter.dev
Signed-off-by: Sven Peter <sven@svenpeter.dev>
Signed-off-by: Sasha Levin <sashal@kernel.org>

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Janne Grunau 2025-02-26 19:00:05 +00:00 • committed by Greg Kroah-Hartman

parent 0c14267f4d

commit 8d64b2aa3e

1 changed files with 1 additions and 1 deletions

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drivers/soc/apple/rtkit.c

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