Long radeon stalls on recent kernels

[Andy Lutomirski]

On Tue, Dec 9, 2014 at 1:18 AM, Michel Dänzer <michel at daenzer.net> wrote:
> On 09.12.2014 09:24, Andy Lutomirski wrote:
>>
>> The relevant line from latencytop seems to be:
>>
>> 154 20441402 489139 radeon_fence_default_wait [radeon]
>> fence_wait_timeout ttm_bo_wait [ttm] ttm_bo_move_accel_cleanup [ttm]
>> radeon_move_blit.isra.12 [radeon] radeon_bo_move [radeon]
>> ttm_bo_handle_move_mem [ttm] ttm_bo_evict [ttm] ttm_mem_evict_first
>> [ttm] ttm_bo_mem_space [ttm] ttm_bo_validate [ttm]
>> radeon_bo_fault_reserve_notify [radeon]
>
> Which process is this?

Xorg

>
> Looks like CPU access to a BO in VRAM, but the BO is located outside of
> the CPU visible area of VRAM, so it has to be moved into the CPU visible
> area first.
>
> Which version of Mesa are you using?
>

mesa-dri-drivers-10.3.3-1.20141110.fc20.x86_64

I'm planning on upgrading to Fedora 21 fairly soon.

--Andy

>
> --
> Earthling Michel Dänzer               |               http://www.amd.com
> Libre software enthusiast             |             Mesa and X developer



-- 
Andy Lutomirski
AMA Capital Management, LLC