[PATCH] drm/radeon: TTM must be init with cpu-visible VRAM, v2

[Dave Airlie]

On Sat, Mar 1, 2014 at 5:56 AM, Christian König <deathsimple at vodafone.de> wrote:
> Am 28.02.2014 19:50, schrieb Lauri Kasanen:
>
>> Without this, a bo may get created in the cpu-inaccessible vram.
>> Before the CP engines get setup, all copies are done via cpu memcpy.
>>
>> This means that the cpu tries to read from inaccessible memory, fails,
>> and the radeon module proceeds to disable acceleration.
>>
>> Doing this has no downsides, as the real VRAM size gets set as soon as the
>> CP engines get init.
>>
>> This is a candidate for 3.14 fixes.
>>
>> v2: Add comment on why the function is used
>>
>> Signed-off-by: Lauri Kasanen <cand at gmx.com>
>
>
> Reviewed-by: Christian König <christian.koenig at amd.com>
>
> And I suggest to add "Cc: stable at vger.kernel.org" as well.
>
> Christian.

Won't this create objects that are stuck in the middle of VRAM with
the new top down approach?

then when we go to use all the VRAM they'll be pinned in the middle?

Dave.