Re: [PATCH] amd/amdkfd: Fix a memory limit issue

[Felix Kuehling]

Am 2022-11-14 um 13:45 schrieb Eric Huang:

It is to resolve a regression, which fails to allocate
VRAM due to no free memory in application, the reason
is we add check of vram_pin_size for memory limit, and
application is pinning the memory for Peerdirect, KFD
should not count it in memory limit. So removing
vram_pin_size will resolve it.

Signed-off-by: Eric Huang <jinhuieric.hu...@amd.com>

Reviewed-by: Felix Kuehling <felix.kuehl...@amd.com>

---
  drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd_gpuvm.c | 4 +---
  1 file changed, 1 insertion(+), 3 deletions(-)

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd_gpuvm.c 
b/drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd_gpuvm.c
index db772942f7a6..fb1bb593312e 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd_gpuvm.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd_gpuvm.c
@@ -172,9 +172,7 @@ int amdgpu_amdkfd_reserve_mem_limit(struct amdgpu_device 
*adev,
            (kfd_mem_limit.ttm_mem_used + ttm_mem_needed >
             kfd_mem_limit.max_ttm_mem_limit) ||
            (adev && adev->kfd.vram_used + vram_needed >
-            adev->gmc.real_vram_size -
-            atomic64_read(&adev->vram_pin_size) -
-            reserved_for_pt)) {
+            adev->gmc.real_vram_size - reserved_for_pt)) {
                ret = -ENOMEM;
                goto release;
        }