diff mbox series

[v2,3/4] soc: apple: rtkit: Use high prio work queue

Message ID 20250226-apple-soc-misc-v2-3-c3ec37f9021b@svenpeter.dev (mailing list archive)
State New
Headers show
Series Miscellaneous Apple RTKit fixes | expand

Commit Message

Sven Peter via B4 Relay Feb. 26, 2025, 7 p.m. UTC 
From: Janne Grunau <j@jannau.net>

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>
Signed-off-by: Sven Peter <sven@svenpeter.dev>
---
 drivers/soc/apple/rtkit.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
diff mbox series

Patch

diff --git a/drivers/soc/apple/rtkit.c b/drivers/soc/apple/rtkit.c
index 7e7b4f64ab17..4b78463dd5a1 100644
--- a/drivers/soc/apple/rtkit.c
+++ b/drivers/soc/apple/rtkit.c
@@ -696,7 +696,7 @@  struct apple_rtkit *apple_rtkit_init(struct device *dev, void *cookie,
 	rtk->mbox->rx = apple_rtkit_rx;
 	rtk->mbox->cookie = rtk;
 
-	rtk->wq = alloc_ordered_workqueue("rtkit-%s", WQ_MEM_RECLAIM,
+	rtk->wq = alloc_ordered_workqueue("rtkit-%s", WQ_HIGHPRI | WQ_MEM_RECLAIM,
 					  dev_name(rtk->dev));
 	if (!rtk->wq) {
 		ret = -ENOMEM;