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From eeef2304ec82d7aa4a53e26d1500cd431baeb7d0 Mon Sep 17 00:00:00 2001
From: Felix Kuehling <Felix.Kuehling@amd.com>
Date: Mon, 25 Nov 2019 16:25:35 -0500
Subject: [PATCH 4599/4736] drm/amdgpu: Raise KFD unpinned system memory limit
Allow KFD applications to use more unpinned system memory through
HMM.
Signed-off-by: Felix Kuehling <Felix.Kuehling@amd.com>
Reviewed-by: Yong Zhao <Yong.Zhao@amd.com>
---
drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd_gpuvm.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd_gpuvm.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd_gpuvm.c
index 083bd8fe8057..a0d138849b61 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd_gpuvm.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd_gpuvm.c
@@ -85,7 +85,7 @@ static bool check_if_add_bo_to_vm(struct amdgpu_vm *avm,
}
/* Set memory usage limits. Current, limits are
- * System (TTM + userptr) memory - 3/4th System RAM
+ * System (TTM + userptr) memory - 15/16th System RAM
* TTM memory - 3/8th System RAM
*/
void amdgpu_amdkfd_gpuvm_init_mem_limits(void)
@@ -98,7 +98,7 @@ void amdgpu_amdkfd_gpuvm_init_mem_limits(void)
mem *= si.mem_unit;
spin_lock_init(&kfd_mem_limit.mem_limit_lock);
- kfd_mem_limit.max_system_mem_limit = (mem >> 1) + (mem >> 2);
+ kfd_mem_limit.max_system_mem_limit = mem - (mem >> 4);
kfd_mem_limit.max_ttm_mem_limit = (mem >> 1) - (mem >> 3);
pr_debug("Kernel memory limit %lluM, TTM limit %lluM\n",
(kfd_mem_limit.max_system_mem_limit >> 20),
--
2.17.1
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