cleanup_offline_cgwb(9)

💅 cleanup_offline_cgwb(9) 💅

okay so bestie, welcome to the Kernel API Manual ✨ — this one's a little kernel function called cleanup_offline_cgwb, and honestly? it's giving cleanup crew energy 🧹🦋

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🎀 NAME 🎀

cleanup_offline_cgwb — detach associated inodes 🫶

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✨ SYNOPSIS ✨

bool cleanup_offline_cgwb (struct bdi_writeback *wb );

like, it takes one thing and returns a bool, periodt 💅

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🌸 ARGUMENTS 🌸

• wb — the target wb 🎯 that's literally the whole argument, no cap

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💖 DESCRIPTION 💖

so here's the vibe 💫: this function switches all the inodes attached to wb over to a nearest living ancestor's wb — the whole point being to eventually release the dying wb 😭👑 it's basically helping the old one retire gracefully, main character energy for the ancestor ngl.

it returns true if not all inodes were switched and the function has to be restarted 🔁 — so like, if you get true back, you're not done, you gotta run it again fr fr 💀

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🦋 SEE ALSO 🦋

• Kernel file ./fs/fs-writeback.c 📁
• inode_io_list_move_locked(9)
• wb_wait_for_completion(9)
• inode_cgwb_move_to_attached(9)
• locked_inode_to_wb_and_lock_list(9)
• inode_to_wb_and_lock_list(9)
• inode_switch_wbs(9)
• wbc_attach_and_unlock_inode(9)
• wbc_attach_fdatawrite_inode(9)
• wbc_detach_inode(9)
• wbc_account_cgroup_owner(9)
• wb_split_bdi_pages(9)
• bdi_split_work_to_wbs(9)
• cgroup_writeback_by_id(9)
• cgroup_writeback_umount(9)
• wb_start_background_writeback(9)
• filemap_dontcache_kick_writeback(9)
• __mark_inode_dirty(9)
• writeback_inodes_sb_nr(9)
• writeback_inodes_sb(9)
• try_to_writeback_inodes_sb(9)
• sync_inodes_sb(9)
• write_inode_now(9)
• sync_inode_metadata(9)

like, that's a whole friend group right there 🫂💜

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that's the whole page bestie, go forth and detach those inodes 🌈⭐

source ./fs, dated October 2026 — mwah 💋 and that's the footer, we ate and left no crumbs 👑🍓