nilfs_transaction_commit(9)

✨ nilfs_transaction_commit(9) ✨

okay so we're in the Kernel API Manual today bestie, and this little function is the "and that's a wrap" of the NILFS2 transaction world 🎀

---

💖 NAME 💖

nilfs_transaction_commit — commit indivisible file operations. yes literally, indivisible like you cannot split it, it's giving all-or-nothing main character energy 🔥

---

🌸 SYNOPSIS 🌸

int nilfs_transaction_commit (struct super_block *sb );

---

🦋 ARGUMENTS 🦋

• sb — the super block. that's the one, the whole filesystem's vibe in a struct 👑

---

💅 DESCRIPTION 💅

so here's the tea ☕ nilfs_transaction_commit releases the read semaphore — the one that got acquired back over in nilfs_transaction_begin. it's the handoff, the "you may go" of the whole operation 🫶

and the way that it's picky about it: this release is only performed in the outermost call of this function. so if you're nested inside other calls, sorry babe, not your turn — the outer one handles it. iykyk 💀

then there's the two flags, and they do two different cute things:

• if a commit flag is set → it sets a timer to start the segment constructor ⏰
• if a sync flag is set → it skips the waiting around and starts construction directly 🏃‍♀️💨

both of those are real, both of those matter, don't mix them up ✨

---

⭐ RETURN ⭐

0 on success 🎉 or a negative error code on failure 😭 (negative = bad news, always)

---

🌈 SEE ALSO 🌈

the whole squad fr fr — kernel file ./fs/nilfs2/segment.c plus:

• nilfs_transaction_begin(9)
• nilfs_segctor_reset_segment_buffer(9)
• nilfs_segctor_zeropad_segsum(9)
• nilfs_write_root_mdt_inode(9)
• nilfs_free_segments(9)
• nilfs_segctor_begin_construction(9)
• nilfs_prepare_write_logs(9)
• nilfs_segctor_start_timer(9)
• nilfs_construct_segment(9)
• nilfs_construct_dsync_segment(9)
• nilfs_segctor_accept(9)
• nilfs_segctor_notify(9)
• nilfs_segctor_construct(9)
• nilfs_log_write_required(9)
• nilfs_segctor_thread(9)
• nilfs_segctor_destroy(9)
• nilfs_attach_log_writer(9)
• nilfs_detach_log_writer(9)

---

no cap, read nilfs_transaction_begin(9) first or you'll be lost in the sauce 🫠

---

and that's the page!! brought to you by ./fs/nilfs2, dated October 2026 — mwah, go commit some transactions bestie 💜🧚‍♀️🍓