Re: [PATCH] radeon: Use only a single work queue thread for crt

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Am 03.08.19 um 02:09 schrieb Andi Kleen:
From: Andi Kleen <ak@xxxxxxxxxxxxxxx>

I got tired of seeing a lot of radeon-crt kernel threads in ps on my
workstation, one for each CPU and one for each display, which never use any CPU time.
Surely a single kernel thread is enough to handle the display.

NAK, radeon blocks inside the kernel thread and those need to run in parallel or otherwise the hardware can hang.

Christian.


Signed-off-by: Andi Kleen <ak@xxxxxxxxxxxxxxx>
---
  drivers/gpu/drm/radeon/radeon_display.c | 2 +-
  1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/radeon/radeon_display.c b/drivers/gpu/drm/radeon/radeon_display.c
index bd52f15e6330..fb0ca688f6fe 100644
--- a/drivers/gpu/drm/radeon/radeon_display.c
+++ b/drivers/gpu/drm/radeon/radeon_display.c
@@ -682,7 +682,7 @@ static void radeon_crtc_init(struct drm_device *dev, int index)
drm_mode_crtc_set_gamma_size(&radeon_crtc->base, 256);
  	radeon_crtc->crtc_id = index;
-	radeon_crtc->flip_queue = alloc_workqueue("radeon-crtc", WQ_HIGHPRI, 0);
+	radeon_crtc->flip_queue = alloc_workqueue("radeon-crtc", WQ_HIGHPRI|WQ_UNBOUND, 0);
  	rdev->mode_info.crtcs[index] = radeon_crtc;
if (rdev->family >= CHIP_BONAIRE) {

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