<html><head> <meta http-equiv="Content-Type" content="text/html; charset=utf-8"> </head> <body> <div class="moz-cite-prefix">On 2025-01-08 08:19, Emily Deng wrote: </div> <blockquote type="cite" cite="mid:20250108131940.1435142-1-Emily.Deng@amd.com"> <pre class="moz-quote-pre" wrap="">For partial migrate from ram to vram, the migrate->cpages is not equal to migrate->npages, should use migrate->npages to check all needed migrate pages which could be copied or not. And only need to set those pages could be migrated to migrate->dst[i], or the migrate_vma_pages will migrate the wrong pages based on the migrate->dst[i]. v2: Add mpages to break the loop earlier. v3: Uses MIGRATE_PFN_MIGRATE to identify whether page could be migrated. Signed-off-by: Emily Deng <a class="moz-txt-link-rfc2396E" href="mailto:Emily.Deng@amd.com"><Emily.Deng@amd.com></a> --- drivers/gpu/drm/amd/amdkfd/kfd_migrate.c | 14 +++++++++----- 1 file changed, 9 insertions(+), 5 deletions(-) diff --git a/drivers/gpu/drm/amd/amdkfd/kfd_migrate.c b/drivers/gpu/drm/amd/amdkfd/kfd_migrate.c index eacfeb32f35d..b671d12c32f6 100644 --- a/drivers/gpu/drm/amd/amdkfd/kfd_migrate.c +++ b/drivers/gpu/drm/amd/amdkfd/kfd_migrate.c @@ -278,10 +278,11 @@ svm_migrate_copy_to_vram(struct kfd_node *node, struct svm_range *prange, struct migrate_vma *migrate, struct dma_fence **mfence, dma_addr_t *scratch, uint64_t ttm_res_offset) { - uint64_t npages = migrate->cpages; + uint64_t npages = migrate->npages; struct amdgpu_device *adev = node->adev; struct device *dev = adev->dev; struct amdgpu_res_cursor cursor; + uint64_t mpages = 0; dma_addr_t *src; uint64_t *dst; uint64_t i, j; @@ -295,14 +296,17 @@ svm_migrate_copy_to_vram(struct kfd_node *node, struct svm_range *prange, amdgpu_res_first(prange->ttm_res, ttm_res_offset, npages << PAGE_SHIFT, &cursor); - for (i = j = 0; i < npages; i++) { + for (i = j = 0; (i < npages) && (mpages < migrate->cpages); i++) { struct page *spage; dst[i] = cursor.start + (j << PAGE_SHIFT); - migrate->dst[i] = svm_migrate_addr_to_pfn(adev, dst[i]); - svm_migrate_get_vram_page(prange, migrate->dst[i]); - migrate->dst[i] = migrate_pfn(migrate->dst[i]); + if (migrate->src[i] & MIGRATE_PFN_MIGRATE) {</pre> </blockquote> This should check flag MIGRATE_PFN_VALID, same as migrate_pfn_to_page, so move this inside below if (spage....) <blockquote type="cite" cite="mid:20250108131940.1435142-1-Emily.Deng@amd.com"> <pre class="moz-quote-pre" wrap=""> + migrate->dst[i] = svm_migrate_addr_to_pfn(adev, dst[i]); + svm_migrate_get_vram_page(prange, migrate->dst[i]); + migrate->dst[i] = migrate_pfn(migrate->dst[i]); + mpages++;</pre> </blockquote> increase mpages here is good, simpler than increasing mpages after each copy, as the last sdma copy outside loop will handle the remaining pages. <blockquote type="cite" cite="mid:20250108131940.1435142-1-Emily.Deng@amd.com"> <pre class="moz-quote-pre" wrap=""> + } spage = migrate_pfn_to_page(migrate->src[i]); if (spage && !is_zone_device_page(spage)) { src[i] = dma_map_page(dev, spage, 0, PAGE_SIZE, </pre> </blockquote> out_free_vram_pages path error handling need fix to put, unlock all migrated pages too, please check changes attached, I only compile but didn't run test with the change. Regards, Philip </body> </html>