| What | Removed | Added |
|---|---|---|
| Keywords | bisected | |
| CC | michel@daenzer.net | |
| Summary | R9 290 low performance in Linux 4.7 | [bisected] R9 290 low performance in Linux 4.7 |
Comment # 12
on bug 97260
from Kai
Ok, after 14 steps of bisection I identified the first bad commit as: c63dd758589b1f7e8398841d1f443f06ebfbcefc is the first bad commit commit c63dd758589b1f7e8398841d1f443f06ebfbcefc Author: Michel Dänzer <michel.daenzer@amd.com> Date: Fri Apr 1 18:51:34 2016 +0900 drm/radeon: Support DRM_MODE_PAGE_FLIP_ASYNC When this flag is set, we program the hardware to execute the flip during horizontal blank (i.e. for the next scanline) instead of during vertical blank (i.e. for the next frame). Currently this is only supported on ASICs which have a page flip completion interrupt (>= R600), and only if the use_pflipirq parameter has value 2 (the default). Reviewed-by: Christian König <christian.koenig@amd.com> Signed-off-by: Michel Dänzer <michel.daenzer@amd.com> Signed-off-by: Alex Deucher <alexander.deucher@amd.com> :040000 040000 2f3d8295e7fa2809a3546a23c64da33311e624b9 6cd9fd9b53df0942efab559295e4c11fc6cc0463 M drivers An additional build of 4.7.0 with c63dd758589b1f7e8398841d1f443f06ebfbcefc reverted maintains the performance level of 4.6.x. Adding Michel to the CC list of this bug, since he authored the offending commit. Let me know, if you need anything else.
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