drm_gpusvm_check_pages(9)

✨ NAME ✨

okay so this is drm_gpusvm_check_pages(9), straight out of the Kernel API Manual, and the official NAME is literally Check pages. That’s the whole assignment, bestie: check pages. 💅

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🌸 SYNOPSIS 🌸

       bool drm_gpusvm_check_pages (struct drm_gpusvm *gpusvm , struct
       drm_gpusvm_notifier *notifier , unsigned long start , unsigned long end
       , void *dev_private_owner );

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🎀 ARGUMENTS 🎀

• gpusvm — Pointer to the GPU SVM structure. it’s giving main-character struct pointer ✨
• notifier — Pointer to the GPU SVM notifier structure. 🫶
• start — Start address. 📍
• end — End address. 🏁
• dev_private_owner — The device private page owner. 👑

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💖 DESCRIPTION 💖

So what this actually does: it checks if the pages between start and end have been faulted in on the CPU. Like, “are these pages CPU-backed or not?” vibes. Use it to prevent migration of pages without CPU backing store. That’s the plot. No cap. 🔥

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🔥 RETURN 🔥

True if pages have been faulted into CPU, False otherwise. Literally that simple, bestie. ✅

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👑 SEE ALSO 👑

Also peep the kernel file ./drivers/gpu/drm/drm_gpusvm.c and the whole friend group of cross-refs: Overview(9), Locking(9), Partial Unmapping of Ranges(9), Examples(9), npages_in_range(9), drm_gpusvm_notifier_find(9), drm_gpusvm_range_find(9), drm_gpusvm_notifier_invalidate(9), drm_gpusvm_init(9), to_drm_gpusvm_notifier(9), drm_gpusvm_notifier_insert(9), drm_gpusvm_notifier_remove(9), drm_gpusvm_fini(9), drm_gpusvm_notifier_alloc(9), drm_gpusvm_notifier_free(9), to_drm_gpusvm_range(9), drm_gpusvm_range_insert(9), __drm_gpusvm_range_remove(9), drm_gpusvm_range_alloc(9), drm_gpusvm_hmm_pfn_to_order(9), drm_gpusvm_scan_mm(9), drm_gpusvm_range_chunk_size(9), drm_gpusvm_driver_lock_held(9), drm_gpusvm_find_vma_start(9), drm_gpusvm_range_find_or_insert(9), __drm_gpusvm_unmap_pages(9), __drm_gpusvm_free_pages(9), drm_gpusvm_free_pages(9), drm_gpusvm_range_remove(9), drm_gpusvm_range_get(9), drm_gpusvm_range_destroy(9), drm_gpusvm_range_put(9), drm_gpusvm_pages_valid(9), drm_gpusvm_pages_valid_unlocked(9), drm_gpusvm_get_pages(9), drm_gpusvm_unmap_pages(9), drm_gpusvm_range_evict(9), drm_gpusvm_has_mapping(9), drm_gpusvm_range_set_unmapped(9). 🦋

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Cute little sign-off: this one lives under ./drivers/gpu/drm, dated October 2026, and it’s drm_gpusvm_check_pages(9). Mwah 💋🎀