scx_for_each_descendant_pre(9)

🌸 NAME 🌸

okay so bestie, gather round — scx_for_each_descendant_pre is literally a pre-order walk of a sched's descendants ✨ like that's the whole vibe, it walks the fam tree, no cap

🎀 SYNOPSIS 🎀

scx_for_each_descendant_pre (pos , root );

that's it, that's the whole call, she's cute and she's compact 💅

🦋 ARGUMENTS 🦋

• pos — the iteration cursor, aka your little pointer bestie that keeps track of where we're at in the walk 🫶
• root — the sched whose descendants we're walking, the main character of this whole operation 👑

🔥 DESCRIPTION 🔥

So we're walking root's descendants 🚶‍♀️✨ and here's the important part — root is included in the iteration and it's the first node to be visited, periodt 💀 she does not get skipped, she's first in line, main character energy fr fr

⚠️ okay listen up because this one matters: you must call this with scx_enable_mutex, scx_sched_lock, or RCU read lock 🔒 no exceptions, no "but bestie I forgot", just hold one of those locks or the whole thing is gonna have a bad time 😭

💜 SEE ALSO 💜

• Kernel file ./kernel/sched/ext/sub.h — go read it, iykyk 📖
• scx_missing_caps(9) — also on the reading list bestie 🌈

and that's the page !! source is ./kernel/sched/ext, dated October 2026, and if you ever need to find her again she goes by scx_for_each_descendant_pre(9) 🎀✨ mwah, go hold that lock 💖