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drm/amdgpu: Rework KFD memory max limits

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To allow bigger allocations specially on systems such as GFXIP 9.4.3
that use GTT memory for VRAM allocations, relax the limits to
maximize ROCm allocations.

Reviewed-by: Felix Kuehling <Felix.Kuehling@amd.com>
Signed-off-by: Rajneesh Bhardwaj <rajneesh.bhardwaj@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Rajneesh Bhardwaj
2023-09-14 15:26:10 -04:00
committed by Alex Deucher
parent 67318cb843
commit 9b37d45d79
1 changed files with 8 additions and 2 deletions
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10
drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd_gpuvm.c
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@@ -44,6 +44,7 @@
* changes to accumulate
*/
#define AMDGPU_USERPTR_RESTORE_DELAY_MS 1
#define AMDGPU_RESERVE_MEM_LIMIT (3UL << 29)
/*
* Align VRAM availability to 2MB to avoid fragmentation caused by 4K allocations in the tail 2MB
@@ -117,11 +118,16 @@ void amdgpu_amdkfd_gpuvm_init_mem_limits(void)
return;
si_meminfo(&si);
mem = si.freeram - si.freehigh;
mem = si.totalram - si.totalhigh;
mem *= si.mem_unit;
spin_lock_init(&kfd_mem_limit.mem_limit_lock);
kfd_mem_limit.max_system_mem_limit = mem - (mem >> 4);
kfd_mem_limit.max_system_mem_limit = mem - (mem >> 6);
if (kfd_mem_limit.max_system_mem_limit < 2 * AMDGPU_RESERVE_MEM_LIMIT)
kfd_mem_limit.max_system_mem_limit >>= 1;
else
kfd_mem_limit.max_system_mem_limit -= AMDGPU_RESERVE_MEM_LIMIT;
kfd_mem_limit.max_ttm_mem_limit = ttm_tt_pages_limit() << PAGE_SHIFT;
pr_debug("Kernel memory limit %lluM, TTM limit %lluM\n",
(kfd_mem_limit.max_system_mem_limit >> 20),