From: Janne Grunau Date: Wed, 26 Feb 2025 19:00:05 +0000 (+0000) Subject: soc: apple: rtkit: Use high prio work queue X-Git-Tag: v6.15-rc1~158^2~17^2~1 X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=22af2fac88fa5dbc310bfe7d0b66d4de3ac47305;p=thirdparty%2Flinux.git soc: apple: rtkit: Use high prio work queue 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 Reviewed-by: Alyssa Rosenzweig Link: https://lore.kernel.org/r/20250226-apple-soc-misc-v2-3-c3ec37f9021b@svenpeter.dev Signed-off-by: Sven Peter --- diff --git a/drivers/soc/apple/rtkit.c b/drivers/soc/apple/rtkit.c index 7e7b4f64ab172..4b78463dd5a10 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;