ttm_tt_backup(9)

💖 NAME 💖

okay bestie, welcome to ttm_tt_backup(9) from the Kernel API Manual — this is the page for ttm_tt_backup, the helper that backs up a struct ttm_tt. That’s the whole name moment. ✨

🎀 SYNOPSIS 🎀

long ttm_tt_backup (struct ttm_device *bdev , struct ttm_tt *tt , const
       struct ttm_backup_flags flags );

🦋 ARGUMENTS 🦋

• bdev — the TTM device. 🫶
• tt — the struct ttm_tt. 🎀
• flags — flags that govern the backup behaviour. 👑

✨ DESCRIPTION ✨

okay so here’s the job: it updates the page accounting and calls ttm_pool_shrink_tt to free pages or back them up. That’s the tea. 💅

🔥 RETURN 🔥

It returns the number of pages freed or swapped out — or a negative error code on error. So yeah, negative means error vibes, bestie. 😭

🌈 SEE ALSO 🌈

the whole crew:

• Kernel file ./drivers/gpu/drm/ttm/ttm_tt.c
• ttm_tt_swapout(9)
• ttm_kmap_iter_tt_init(9)
• ttm_tt_setup_backup(9)

🧚 cute lil sign-off: source/version ./drivers/gpu/drm/ttm · date October 2026 · page ttm_tt_backup(9) — mwah 💖