freebsd7 (and 8), radeon, xorg-server -> deadlock or so

[Oliver Pinter]

The interest thing is, with the previous version of xorg-server never
locked the system up...

On 2/13/10, Norbert Papke <npapke at acm.org> wrote:
> On February 13, 2010, Robert Noland wrote:
>> On Sat, 2010-02-13 at 11:37 -0800, Norbert Papke wrote:
>> > On February 13, 2010, Robert Noland wrote:
>> > > Ok, I've put up a patch at:
>> > >
>> > > http://people.freebsd.org/~rnoland/drm-radeon-test.patch
>>
>> http://people.freebsd.org/~rnoland/drm-radeon-8-test.patch
>>
>> This one should work on 8...
>
> Thanks, the patch applies and builds cleanly.
>
> Unfortunately, it does not fix things for me.
> I am back to completely hanging the system.  I getting
> the sense that there is some randomness or a timing issue.
> Changes that improved the behavior in one trial do not
> necessarily help in another trial.
>
> One thing I did is enable DRM_DEBUG.  I wanted to get
> sense of how far we got before the hang.  Unfortunately,
> there is no guarantee that log messages will be persisted
> before the system hangs.  In a few attempts, the latest
> messages I observed were the following:
>
> Feb 13 13:37:58 proven kernel: [drm:pid41750:r600_do_init_cp]
> dev->agp_buffer_map->virtual 0xffffff807a51b000
> Feb 13 13:37:58 proven kernel: info: [drm] Setting GART location based on
> new memory map
> Feb 13 13:37:58 proven kernel: [drm:pid41750:r600_do_init_cp] fb 0xd0000000
> size 536870912
> Feb 13 13:37:58 proven kernel: [drm:pid41750:r600_do_init_cp]
> dev_priv->gart_size 33554432
> Feb 13 13:37:58 proven kernel: [drm:pid41750:r600_do_init_cp]
> dev_priv->gart_vm_start 0xf0000000
> Feb 13 13:37:58 proven kernel: [drm:pid41750:r600_do_init_cp]
> dev_priv->gart_buffers_offset 0xf0102000
> Feb 13 13:37:58 proven kernel: [drm:pid41750:r600_do_init_cp] Using gart
> offset 0x0fff0000
> Feb 13 13:37:58 proven kernel: [drm:pid41750:r600_do_init_cp] Setting
> phys_pci_gart to 0xffffff00dfff0000 0FFF0000
> Feb 13 13:37:58 proven kernel: [drm:pid41750:r600_page_table_init] page
> entry 0: 0x00000000b956c063
> Feb 13 13:37:58 proven kernel: [drm:pid41750:r600_page_table_init] page
> entry 128: 0x0000000082128063
> Feb 13 13:37:58 proven kernel: [drm:pid41750:r600_page_table_init] page
> entry 256: 0x0000000098b8a063
>
> [...]
>
> Feb 13 13:37:58 proven kernel: [drm:pid41750:r600_page_table_init] page
> entry 7936: 0x00000000499df063
> Feb 13 13:37:58 proven kernel: [drm:pid41750:r600_page_table_init] page
> entry 8064: 0x0000000049a21063
> Feb 13 13:37:58 proven kernel: info: [drm] Loading RV635 Microcode
> Feb 13 13:37:58 proven kernel: [drm:pid41750:r600_do_cp_stop]
>
> I will repeat the experiment a few more times.
>
> Cheers.
>
> -- Norbert Papke.
>    npapke at acm.org
>
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