drm_sched_rq_select_entity(9)

💖 drm_sched_rq_select_entity(9) 💖

okay so welcome to the Kernel API Manual, bestie — this page is literally about selecting an entity that provides a job to run, and it's giving main-character scheduler energy. no cap. 🫶✨

🌈 SYNOPSIS 🌈

struct drm_sched_entity * drm_sched_rq_select_entity (struct drm_gpu_scheduler *sched , struct drm_sched_rq *rq );

🎀 ARGUMENTS 🎀

• sched — the gpu scheduler. like, the boss of the GPU scheduling vibe 💅
• rq — scheduler run queue to check. yes bestie, we are checking the run queue fr fr 🦋

✨ DESCRIPTION ✨

The whole mission is: Find oldest waiting ready entity. periodt. 👑

Return an entity if one is found; return an error-pointer (!NULL) if an entity was ready, but the scheduler had insufficient credits to accommodate its job; return NULL, if no ready entity was found. that's the vibe check — three possible outcomes, no guessing 🙈

lowkey important: NULL is not the same as the error-pointer (!NULL) here, so don't mix them up bestie 😭

💜 SEE ALSO 💜

Kernel file ./drivers/gpu/drm/scheduler/sched_rq.c — and the whole squad is:

• drm_sched_rq_init(9)
• drm_sched_rq_add_entity(9)
• drm_sched_rq_remove_entity(9)
• drm_sched_rq_pop_entity(9)

mwah 💋 source/version: ./drivers/gpu/drm/scheduler, date: October 2026, and the page is drm_sched_rq_select_entity(9) — bye bestie, slay your scheduler studies! 🌈✨🎀