https://bugs.freedesktop.org/show_bug.cgi?id=85207

--- Comment #1 from Andy Furniss adf.lists@gmail.com --- Also noticed in that dmesg and searching kern log that I sometimes get apparently without effect -

kernel: [drm:radeon_gem_va_update_vm] *ERROR* Couldn't update BO_VA (-512)

With this kernel.

https://bugs.freedesktop.org/show_bug.cgi?id=85207

--- Comment #3 from Andy Furniss adf.lists@gmail.com --- (In reply to Michel Dänzer from comment #2)

(In reply to Andy Furniss from comment #0)

...

Haven't seen on drm-next-3.18-wip

Can you bisect the kernel?

May be a bit early, but I will sit on the one before for a while to confirm.

Looks like the head commit -

commit bb9a49819ed30f3f5782b2504066547a8507a591 Author: Christian König christian.koenig@amd.com Date: Mon Oct 13 12:41:47 2014 +0200

drm/radeon: update the VM after setting BO address

This way the necessary VM update is kicked off immediately if all BOs involved are in GPU accessible memory.

I haven't managed to lock or get Valley to GPU fault on the one before so far.

FWIW I noticed even on head the valley fault doesn't always happen - it seems that I need to have set my CPUs to perf (which I nearly always do when testing things like this). With cpufreq ondemand I didn't see the fault.

https://bugs.freedesktop.org/show_bug.cgi?id=85207

--- Comment #5 from Andy Furniss adf.lists@gmail.com --- (In reply to Christian König from comment #4)

Created attachment 108165 [details] [review] Possible fix

Ups! Forgotten to take the VM lock in radeon_gem_va_update_vm. Fix is attached.

Thanks for testing, Christian.

I don't know about Elemental as it's far harder to trigger, but first try with valley produced -

[ 156.617954] radeon 0000:01:00.0: GPU fault detected: 146 0x02e83504 [ 156.617960] radeon 0000:01:00.0: VM_CONTEXT1_PROTECTION_FAULT_ADDR 0x00010F17 [ 156.617961] radeon 0000:01:00.0: VM_CONTEXT1_PROTECTION_FAULT_STATUS 0x08035004 [ 156.617963] VM fault (0x04, vmid 4) at page 69399, read from VGT (53)

https://bugs.freedesktop.org/show_bug.cgi?id=85207

--- Comment #7 from Andy Furniss adf.lists@gmail.com --- (In reply to Christian König from comment #6)

(In reply to Andy Furniss from comment #5)

...

I don't know about Elemental as it's far harder to trigger, but first try with valley produced -

[ 156.617954] radeon 0000:01:00.0: GPU fault detected: 146 0x02e83504 [ 156.617960] radeon 0000:01:00.0: VM_CONTEXT1_PROTECTION_FAULT_ADDR 0x00010F17 [ 156.617961] radeon 0000:01:00.0: VM_CONTEXT1_PROTECTION_FAULT_STATUS 0x08035004 [ 156.617963] VM fault (0x04, vmid 4) at page 69399, read from VGT (53)

Sounds like a different problem triggered by the same patchset to me.

But first things first, is the original issue with the list corruption fixed? If yes we can start to look into this one as well.

It's OK so far, but then I need more time as I don't really know how to trigger it and last time I called it as OK (in another bug) it wasn't.

https://bugs.freedesktop.org/show_bug.cgi?id=85207

--- Comment #9 from Andy Furniss adf.lists@gmail.com --- (In reply to Christian König from comment #6)

But first things first, is the original issue with the list corruption fixed? If yes we can start to look into this one as well.

Enough time has passed now, so I do think that the patch fixed the list corruption.

https://bugs.freedesktop.org/show_bug.cgi?id=85207

--- Comment #11 from Michel Dänzer michel@daenzer.net --- (In reply to Lorenzo Bona from comment #10)

[ 1384.901951] [drm:radeon_gem_va_ioctl [radeon]] *ERROR* Couldn't update BO_VA (-512)

Christian, any ideas for these? Various people including myself are still hitting them occasionally.

https://bugs.freedesktop.org/show_bug.cgi?id=85207

--- Comment #13 from Christian König deathsimple@vodafone.de --- (In reply to Michel Dänzer from comment #11)

(In reply to Lorenzo Bona from comment #10)

...

[ 1384.901951] [drm:radeon_gem_va_ioctl [radeon]] *ERROR* Couldn't update BO_VA (-512)

Christian, any ideas for these? Various people including myself are still hitting them occasionally.

Ups, yeah trivial to fix.

https://bugs.freedesktop.org/show_bug.cgi?id=85207

Christian König deathsimple@vodafone.de changed:

What |Removed |Added ---------------------------------------------------------------------------- CC| |commiethebeastie@gmail.com

--- Comment #15 from Christian König deathsimple@vodafone.de --- *** Bug 88211 has been marked as a duplicate of this bug. ***