[Openchrome-users] "Reclaim buffers locked deadlock"

[Thomas Hellström]

Benno Schulenberg wrote:

>Hi,
>
>Today I've upgraded from kernel 2.6.17 to 2.6.18, plus the latest drm from git,
>and the latest libdrm.  When X is starting up there is now a pause of several
>seconds before the cursor first appears, and in the kernel log there's this:
>
>Nov 11 23:48:31 ordesa kernel: [drm:drm_release] *ERROR* Reclaim buffers locked deadlock.
>Nov 11 23:48:31 ordesa kernel: [drm:drm_release] *ERROR* This is probably a single thread having multiple
>Nov 11 23:48:31 ordesa kernel: [drm:drm_release] *ERROR* DRM file descriptors open either dying or closing file descriptors
>Nov 11 23:48:31 ordesa kernel: [drm:drm_release] *ERROR* while having the lock. I will not reclaim buffers.
>Nov 11 23:48:31 ordesa kernel: [drm:drm_release] *ERROR* Locking context is 0x00000001
>Nov 11 23:48:34 ordesa kernel: [drm:drm_release] *ERROR* Reclaim buffers locked deadlock.
>Nov 11 23:48:34 ordesa kernel: [drm:drm_release] *ERROR* This is probably a single thread having multiple
>Nov 11 23:48:34 ordesa kernel: [drm:drm_release] *ERROR* DRM file descriptors open either dying or closing file descriptors
>Nov 11 23:48:34 ordesa kernel: [drm:drm_release] *ERROR* while having the lock. I will not reclaim buffers.
>Nov 11 23:48:34 ordesa kernel: [drm:drm_release] *ERROR* Locking context is 0x00000001
>
>Anyone else seeing this?  Should I maybe be using the in-kernel drm instead?
>
>Benno
>
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Hi,

This should be happening with AIGLX. Either someone has to fix up AIGLX 
or we have to move away all drm drivers from using reclaim_buffers_locked.

It might be that the latest xserver git with Dave Airlies fix to load 
the system libdrm instead of the xserver built-in libdrm fixes this.

The reason it doesn't hang with the old drm is a pure coincidence.

/Thomas