[Bug 214621] WARNING: CPU: 3 PID: 521 at drivers/gpu/drm/ttm/ttm_bo.c:409 ttm_bo_release+0xb64/0xe40 [ttm]

[bugzilla-daemon at bugzilla.kernel.org]

https://bugzilla.kernel.org/show_bug.cgi?id=214621

--- Comment #4 from Erhard F. (erhard_f at mailbox.org) ---
(In reply to Lang Yu from comment #3)
> Could you please reproduce it on a ubuntu 20.04 system? I didn't reproduce
> it on ubuntu 20.04.
Not on this machine unfortunately. I need it 24/7 as a fileserver and audio
server. Building vanilla or -rc kernels and running these on Gentoo is fine but
installing another distro, getting configs equal and running Ubuntu instead for
testing purposes is too much effort, sorry.

> And could you please get outputs of following command before rebooting?
> Thanks!
> 
> $ cat /sys/kernel/debug/dma_buf/bufinfo
Current kernel is v5.14.14, built with clang 12.0.1 (-Os).

 # cat /sys/kernel/debug/dma_buf/bufinfo

Dma-buf Objects:
size            flags           mode            count           exp_name       
ino     
03047424        00000002        00080007        00000003        drm    
00415409        
        Shared fence: drm_sched gfx signalled
        Attached Devices:
Total 0 devices attached

03047424        00000002        00080007        00000003        drm    
00414559        
        Shared fence: drm_sched gfx signalled
        Attached Devices:
Total 0 devices attached

00004096        00000002        00080007        00000003        drm    
00414537        
        Attached Devices:
Total 0 devices attached

00004096        00000002        00080007        00000003        drm    
00415280        
        Shared fence: drm_sched gfx signalled
        Attached Devices:
Total 0 devices attached

07864320        00000002        00080007        00000003        drm    
00244896        
        Shared fence: drm_sched gfx signalled
        Attached Devices:
Total 0 devices attached

07864320        00000002        00080007        00000003        drm    
00242446        
        Shared fence: drm_sched gfx signalled
        Attached Devices:
Total 0 devices attached

00065536        00000002        00080007        00000003        drm    
00058778        
        Attached Devices:
Total 0 devices attached

08355840        00000002        00080007        00000004        drm    
00058661        
        Attached Devices:
Total 0 devices attached

08355840        00000002        00080007        00000002        drm    
00003715        
        Shared fence: drm_sched gfx signalled
        Attached Devices:
Total 0 devices attached


Total 9 objects, 38608896 bytes

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