ttm_backup_bytes_avail(9)

💅 ttm_backup_bytes_avail(9) — or, "how much backup room do we even have left??"

okay bestie, so this one's from the Kernel API Manual and it's a lil function page from the kernel's ttm_backup_bytes_avail(9) world — yes the section number is 9, she's a kernel-internals girlie, we respect her 🫶

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✨ NAME ✨

ttm_backup_bytes_avail — reports the approximate number of bytes of backup space that's still left for backup. that's it, that's the whole job, and she does it slayfully 💖

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🌸 SYNOPSIS 🌸

u64 ttm_backup_bytes_avail (void );

look at her, no args, just vibes and a u64 return ✨

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🎀 ARGUMENTS 🎀

• void — no arguments. literally nothing. she takes zero input and she's iconic for it 💅

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🦋 DESCRIPTION 🦋

so this function is also intended for driver use — as in, drivers can call her up to check whether a backup attempt is even meaningful. like, is it worth trying? is there actually room? she's your little reality check bestie 🙈

ngl the word "approximate" is doing heavy lifting here — she's giving you a rough size, not a promise. don't be weird about it 💀

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⭐ RETURN ⭐

she returns an approximate size of the backup space that's available. approximate!! did we mention approximate 😭 (yes. yes we did.)

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🌈 SEE ALSO 🌈

• kernel file ./drivers/gpu/drm/ttm/ttm_backup.c
• ttm_backup_drop(9)
• ttm_backup_copy_page(9)
• ttm_backup_backup_folio(9)
• ttm_backup_fini(9)
• ttm_backup_shmem_create(9)

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and that's the whole page, bestie, no cap 💜 this lil masterpiece lives over at ./drivers/gpu/drm/ttm and was dated October 2026 — so go forth, check your backup bytes, and remember: approximate is a lifestyle 🧚‍♀️✨🔥