drbd_bmio_set_n_write(9)

💅 drbd_bmio_set_n_write(9) — like, the manual page, but make it make sense

okay so bestie, buckle up, this one's from the Kernel API Manual and it's honestly kind of a vibe. it's giving "small function, big responsibilities" energy. let's get into it 🫶

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✨ NAME ✨

drbd_bmio_set_n_write — the io_fn you hand to drbd_queue_bitmap_io() or drbd_bitmap_io(). that's it, that's the job. she's a callback, she's iconic, she shows up when the bitmap needs her 💅

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🦋 SYNOPSIS 🦋

int drbd_bmio_set_n_write (struct drbd_device *device , struct
drbd_peer_device *peer_device );

yes the whole signature, copied exactly, no cap. it returns an int, it takes two pointers, and it's out here living its truth ✨

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🎀 ARGUMENTS 🎀

• device — the DRBD device. your main character, fr fr 🎀
• peer_device — the peer DRBD device. yeah, the peer one. don't mix them up bestie, i'm begging 😭

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🌸 DESCRIPTION 🌸

okay so what does she actually do, you ask. two things. literally two:

• sets all the bits in the bitmap
• writes the whole bitmap to stable storage

that's the entire plot. no plot twists. she sets everything, she writes everything, she leaves. main character energy but make it a bitmap 🔥

no cap, "stable storage" is doing a lot of work in that sentence — that's the actual persistence part, so it's not just vibes in RAM, it's the real deal ✨

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🧚 SEE ALSO 🧚

the whole friend group, listed exactly as the page lists them, from the Kernel file ./drivers/block/drbd/drbd_main.c:

tl_release(9), _tl_restart(9), tl_clear(9), tl_abort_disk_io(9), drbd_thread_current_set_cpu(9), drbd_send_current_state(9), drbd_send_state(9), _drbd_send_ack(9), drbd_send_ack(9), drbd_md_sync(9), drbd_md_read(9), drbd_md_mark_dirty(9), drbd_uuid_new_current(9), drbd_bmio_clear_n_write(9), drbd_queue_bitmap_io(9), drbd_bitmap_io(9), drbd_wait_misc(9)

(psst — drbd_bmio_clear_n_write(9) is literally her sibling, the clear version. family business 💜)

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💖 the sign-off 💖

and that's the whole page, bestie!! came from ./drivers/block/drbd, dated October 2026 — so yeah, she's from the future, slay 👑✨ go set some bits, write some stable storage, and remember: every single detail here is real, i would never lie to you 🫶💅