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drm/amdgpu: Use free system memory size for kfd memory accounting

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With the current kfd memory accounting scheme, kfd applications
can use up to 15/16 of total system memory. For system which
has small total system memory size it leaves small system memory
for OS. For example, if the system has totally 16GB of system
memory, this scheme leave OS and non-kfd applications only 1GB
of system memory. In many cases, this leads to OOM killer.

This patch changed the KFD system memory accounting scheme.
15/16 of free system memory when kfd driver load. This deduct
the system memory that OS already use.

Signed-off-by: Oak Zeng <Oak.Zeng@amd.com>
Suggested-by: Philip Yang <Philip.Yang@amd.com>
Reviewed-by: Felix Kuehling <Felix.Kuehling@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Oak Zeng 2021-01-18 14:55:34 -06:00 committed by Alex Deucher
parent b335f289fe
commit df23d1bbd1
2 changed files with 2 additions and 2 deletions
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2
drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd.c
View File

@ -44,7 +44,7 @@ int amdgpu_amdkfd_init(void)
int ret;
si_meminfo(&si);
amdgpu_amdkfd_total_mem_size = si.totalram - si.totalhigh;
amdgpu_amdkfd_total_mem_size = si.freeram - si.freehigh;
amdgpu_amdkfd_total_mem_size *= si.mem_unit;
ret = kgd2kfd_init();

2
drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd_gpuvm.c
View File

@ -97,7 +97,7 @@ void amdgpu_amdkfd_gpuvm_init_mem_limits(void)
uint64_t mem;
si_meminfo(&si);
mem = si.totalram - si.totalhigh;
mem = si.freeram - si.freehigh;
mem *= si.mem_unit;
spin_lock_init(&kfd_mem_limit.mem_limit_lock);