Am 24.10.18 um 10:04 schrieb Michel Dänzer:
On 2018-10-23 9:07 p.m., Marek Olšák wrote:
From: Marek Olšák <marek.ol...@amd.com>

---
  amdgpu/amdgpu_bo.c | 15 +++++++++------
  1 file changed, 9 insertions(+), 6 deletions(-)

diff --git a/amdgpu/amdgpu_bo.c b/amdgpu/amdgpu_bo.c
index 81f8a5f7..00b9b54a 100644
--- a/amdgpu/amdgpu_bo.c
+++ b/amdgpu/amdgpu_bo.c
@@ -91,26 +91,29 @@ drm_public int amdgpu_bo_alloc(amdgpu_device_handle dev,
        if (r)
                goto out;
r = amdgpu_bo_create(dev, alloc_buffer->alloc_size, args.out.handle,
                             buf_handle);
        if (r) {
                amdgpu_close_kms_handle(dev, args.out.handle);
                goto out;
        }
- pthread_mutex_lock(&dev->bo_table_mutex);
-       r = handle_table_insert(&dev->bo_handles, (*buf_handle)->handle,
-                               *buf_handle);
-       pthread_mutex_unlock(&dev->bo_table_mutex);
-       if (r)
-               amdgpu_bo_free(*buf_handle);
+       if (alloc_buffer->preferred_heap &
+           (AMDGPU_GEM_DOMAIN_VRAM | AMDGPU_GEM_DOMAIN_GTT)) {
What about AMDGPU_GEM_DOMAIN_CPU? I mean, that's unlikely to actually be
used here, but if it were, exporting and importing the resulting BO
should work fine?

Instead of white-listing the domains which can be shared, it might be
better to black-list those which can't, i.e. GDS/GWS/OA.

Well first of all GDS can be shared between applications.

Then adding a BO to the tracking doesn't add much overhead (only 8 bytes and only if it was the last allocated).

So I don't really see a reason why we should do this?

Christian.
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