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| author |  Philip Yang <Philip.Yang@amd.com>
| 2022-07-26 15:13:30 -0400 |
|---|---|---|
| committer |  Alex Deucher <alexander.deucher@amd.com>
| 2022-09-13 12:54:23 -0400 |
| commit | c969c5fd21fd700b126aa139ec57875697946474 (patch) | |
| tree | 91985e7bd6a9a223fa924488837281c5204187d8 /drivers/gpu/drm/amd/amdkfd/kfd_svm.h | |
| parent | drm/amdkfd: handle CPU fault on COW mapping (diff) | |
| download | linux-c969c5fd21fd700b126aa139ec57875697946474.tar.gz linux-c969c5fd21fd700b126aa139ec57875697946474.tar.bz2 linux-c969c5fd21fd700b126aa139ec57875697946474.zip | |
drm/amdkfd: Remove prefault before migrating to VRAM
Prefaulting potentially allocates system memory pages before a
migration. This adds unnecessary overhead. Instead we can skip
unallocated pages in the migration and just point migrate->dst to a
0-initialized VRAM page directly. Then the VRAM page will be inserted
to the PTE. A subsequent CPU page fault will migrate the page back to
system memory.
Signed-off-by: Philip Yang <Philip.Yang@amd.com>
Reviewed-by: Felix Kuehling <Felix.Kuehling@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Diffstat (limited to 'drivers/gpu/drm/amd/amdkfd/kfd_svm.h')
| -rw-r--r-- | drivers/gpu/drm/amd/amdkfd/kfd_svm.h | 2 |
1 files changed, 0 insertions, 2 deletions
diff --git a/drivers/gpu/drm/amd/amdkfd/kfd_svm.h b/drivers/gpu/drm/amd/amdkfd/kfd_svm.h index cfac13ad06ef..012c53729516 100644 --- a/drivers/gpu/drm/amd/amdkfd/kfd_svm.h +++ b/drivers/gpu/drm/amd/amdkfd/kfd_svm.h @@ -181,8 +181,6 @@ void schedule_deferred_list_work(struct svm_range_list *svms); void svm_range_dma_unmap(struct device *dev, dma_addr_t *dma_addr, unsigned long offset, unsigned long npages); void svm_range_free_dma_mappings(struct svm_range *prange); -void svm_range_prefault(struct svm_range *prange, struct mm_struct *mm, - void *owner); int svm_range_get_info(struct kfd_process *p, uint32_t *num_svm_ranges, uint64_t *svm_priv_data_size); int kfd_criu_checkpoint_svm(struct kfd_process *p, |