dsq_insert_head(9)

📦 version 7.3.1, in nixpkgs unstable

💖 dsq_insert_head(9) 💖

okay bestie, welcome to the dsq_insert_head(9) page from the Kernel API Manual ✨ this one is short, iconic, and lowkey all about a FIFO head insert that respects %SCX_TASK_PROTECTED 💅

🌸 NAME 🌸

dsq_insert_head — FIFO head insertion honoring %SCX_TASK_PROTECTED

✨ SYNOPSIS ✨

no cap, the signature is exactly this:

bool dsq_insert_head (struct scx_dispatch_q *dsq , struct task_struct *p
);

🎀 ARGUMENTS 🎀

  • dsq — the DSQ to insert into 🫶
  • p — the task being inserted 💖

🦋 DESCRIPTION 🦋

A HEAD insert should land behind any leading protected tasks. So yeah, if there are protected tasks leading the DSQ, your head insert slides in behind them — that's the whole %SCX_TASK_PROTECTED vibe check 💅

A return of true indicates whether p became the first entry. periodt 💖

🌈 SEE ALSO 🌈

Kernel file ./kernel/sched/ext/ext.c, plus the whole squad:

signed off from ./kernel/sched/ext, dated October 2026, and the footer still says dsq_insert_head(9) — bye bestie, go slay your scheduling 💅✨

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