wb_over_bg_thresh(9)

💖 NAME 💖

okay so bestie, this is the wb_over_bg_thresh(9) page from the Kernel API Manual — folding the manual name right in here so we can skip the boring copied header, periodt ✨. The whole vibe is one question: does @wb need to be written back? 👑

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✨ SYNOPSIS ✨

bool wb_over_bg_thresh (struct bdi_writeback *wb );

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🫶 ARGUMENTS 🫶

• wb — the bdi_writeback of interest, aka the little writeback situation you're checking on 👀

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🌸 DESCRIPTION 🌸

This function determines whether background writeback should keep writing wb or whether it's clean enough already. Basically: is this writeback still main character energy, or can it chill? 💅

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💅 RETURN 💅

It gives you true if writeback should continue. no cap, that's the whole answer 🫶

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🔥 SEE ALSO 🔥

Kernel file ./mm/page-writeback.c — go peek at these besties:

• node_dirtyable_memory(9)
• global_dirtyable_memory(9)
• domain_dirty_limits(9)
• global_dirty_limits(9)
• node_dirty_limit(9)
• node_dirty_ok(9)
• __wb_calc_thresh(9)
• balance_dirty_pages_ratelimited_flags(9)
• balance_dirty_pages_ratelimited(9)
• tag_pages_for_writeback(9)
• writeback_iter(9)
• filemap_dirty_folio(9)
• folio_redirty_for_writepage(9)
• folio_mark_dirty(9)
• folio_wait_writeback(9)
• folio_wait_writeback_killable(9)
• folio_wait_stable(9)

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made with 💖 from source ./mm, dated October 2026, and this is wb_over_bg_thresh(9) — bye bestie 🎀