On 2017-09-02 03:52 AM, Christian König wrote:
> Ah, crap yeah that won't work.
>
> Yeah, we should block userptr BOs in amdgpu_ttm_bind() for now.
>
>> There is something else still broken in our IPC test for system memory
>> also, but I'll have to rewrite that anyway to work for large BOs with a
Thinking more about this it looks like a general bug in the userptr
put_page handling.
Patch to fix this is on the list,
Christian.
Am 02.09.2017 um 09:52 schrieb Christian König:
Ah, crap yeah that won't work.
Yeah, we should block userptr BOs in amdgpu_ttm_bind() for now.
There is somethi
Ah, crap yeah that won't work.
Yeah, we should block userptr BOs in amdgpu_ttm_bind() for now.
There is something else still broken in our IPC test for system memory
also, but I'll have to rewrite that anyway to work for large BOs with a
small GART.
Hui? Well userptr BOs can't be used for IPC,
Actually, I read that wrong. It does GART bind userptr BOs. But it also
unpins and repins them accidentally in the process, since
ttm_bo_move_ttm calls backend_unbind and backend_bind callbacks. And
ends up corrupting some kernel page state, because we had to move the
pinning of user pages out of b
It also seems to break GART binding of userptr BOs. Since backend_bind
doesn't do GART binding for userptr BOs, they now don't get GART bound
at all.
There is something else still broken in our IPC test for system memory
also, but I'll have to rewrite that anyway to work for large BOs with a
small
Yeah, the bug is really obvious after you pointed it out. We just need
to keep the placement flags.
Going to send a fix to the list in a minute,
Christian.
Am 01.09.2017 um 00:50 schrieb Felix Kuehling:
I believe this patch breaks pinned GTT BOs. It trips KFD tests that
apply a lot of memory p
I believe this patch breaks pinned GTT BOs. It trips KFD tests that
apply a lot of memory pressure on one of our test systems.
I understand the cause of the problem (see my analysis below), but I'm
not sure how to solve it, without reverting the patch. Christian, do you
have any ideas? Should we a
