Bug 216120

Summary:	[BISECTED][REGRESSION] drm/amdgpu: add drm buddy support to amdgpu
Product:	Drivers	Reporter:	mat200300h
Component:	Video(DRI - non Intel)	Assignee:	drivers_video-dri
Status:	RESOLVED WILL_NOT_FIX
Severity:	normal	CC:	tasksynctest
Priority:	P1
Hardware:	Intel
OS:	Linux
Kernel Version:	5.19-rc1	Subsystem:
Regression:	Yes	Bisected commit-id:
Attachments:	BISECT_LOG BISECT_LOG journal 2022-07-14

Description mat200300h 2022-06-13 16:27:46 UTC

KDE plasma panel at the bottom of the desktop is empty. If I revert the patch
drm/amdgpu: add drm buddy support to amdgpu 	c9cad937c0c58618fe5b0310fd539a854dc1ae95 the panel shows widgets and running programs again. Fortunately the patch seems to revert cleanly.

BISECT_LOG and lspci attached

Comment 1 mat200300h 2022-06-13 16:31:10 UTC

Created attachment 301164 [details]
BISECT_LOG

Comment 2 mat200300h 2022-06-13 16:33:06 UTC

Created attachment 301165 [details]
BISECT_LOG

Comment 3 mat200300h 2022-06-14 05:59:18 UTC

same bad commit:
https://gitlab.freedesktop.org/drm/amd/-/issues/2050

Comment 4 mat200300h 2022-07-14 11:42:42 UTC

this patch:

https://gitlab.freedesktop.org/drm/amd/uploads/564b2cc2b5ea87357f39e45c3a1a44e2/0001-drm-amdgpu-Fix-for-drm-buddy-memory-corruption.patch

on top of 5.19.0-rc6 seems to fix the problem

tested:

5.19.0-rc6: NOT OK

5.19.0-rc6+0001-drm-amdgpu-Fix-for-drm-buddy-memory-corruption.patch: OK

Comment 5 mat200300h 2022-07-14 17:38:32 UTC

Created attachment 301427 [details]
journal 2022-07-14

Comment 6 mat200300h 2022-07-14 17:47:11 UTC

not quite there yet, after some hours of working with latest linus+0001-drm-amdgpu-Fix-for-drm-buddy-memory-corruption.patch (latest commit "vf/remap: return the amount of bytes actually deduplicated") display stopped working, keyboard was working so I could reboot blindly. Part of journal attached in comment 5. Maybe different bug.

I could perhaps bisect adding the patch to relevant steps but now I have had too many gin&tonics and seem to be talking to myself anyway.