drm_pagemap_...etired_pages(9)

💅 drm_pagemap_skip_retired_pages(9) 💅

okay so bestie, welcome to the Kernel API Manual ✨ this one's a tiny little function page but she still ate, and we're gonna get through her together, no cap 🫶

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🌸 NAME 🌸

drm_pagemap_skip_retired_pages — skip retired device-private folios, periodt 💅

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✨ SYNOPSIS ✨

void drm_pagemap_skip_retired_pages (unsigned long *src_pfns , unsigned long npages );

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🎀 ARGUMENTS 🎀

• src_pfns — the MIGRATE_PFN-encoded source array, like the whole squad of pfns in their little encoded fits 💖
• npages — how many entries are living in src_pfns, aka the headcount at the door 🦋

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🔥 DESCRIPTION 🔥

So what she does: she skips source folios that have already been migrated to RAM 😌 the way we know they're already migrated is the migrated flag stored in the physical folio's zone_device_data — that's the vibe check, iykyk ⭐

Basically: already-moved folios? Not our problem anymore, we're walking past them 💀✨

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🌈 SEE ALSO 🌈

the whole friend group, fr fr — go say hi 👑

• Kernel file ./drivers/gpu/drm/drm_pagemap.c Overview(9)
• Migration(9)
• struct drm_pagemap_zdd(9)
• drm_pagemap_zdd_alloc(9)
• drm_pagemap_zdd_get(9)
• drm_pagemap_zdd_destroy(9)
• drm_pagemap_zdd_put(9)
• drm_pagemap_migration_unlock_put_folio(9)
• drm_pagemap_migration_unlock_put_pages(9)
• drm_pagemap_get_devmem_page(9)
• drm_pagemap_migrate_map_device_private_pages(9)
• struct drm_pagemap_iova_state(9)
• drm_pagemap_migrate_map_system_pages(9)
• drm_pagemap_migrate_populate_src_pages(9)
• drm_pagemap_migrate_unmap_pages(9)
• struct migrate_range_loc(9)
• drm_pagemap_cpages(9)
• drm_pagemap_migrate_to_devmem(9)
• drm_pagemap_migrate_populate_ram_pfn(9)
• struct drm_pagemap_dev_hold(9)
• drm_pagemap_reinit(9)
• drm_pagemap_init(9)
• drm_pagemap_put(9)
• drm_pagemap_page_get_flags(9)
• drm_pagemap_page_set_flags(9)
• drm_pagemap_retire_migrated_pages(9)
• drm_pagemap_evict_to_ram(9)
• __drm_pagemap_migrate_to_ram(9)
• drm_pagemap_folio_free(9)
• drm_pagemap_migrate_to_ram(9)
• drm_pagemap_pagemap_ops_get(9)
• drm_pagemap_devmem_init(9)
• drm_pagemap_page_to_dpagemap(9)
• drm_pagemap_populate_mm(9)

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aaaaand that's the whole page bestie, short and iconic 🧚‍♀️💜 this little gem comes from ./drivers/gpu/drm, dated October 2026 — mwah, go forth and skip those retired folios 💋🎀