sdma_empty(9)

💖 NAME 💖

okay so bestie, this page is sdma_empty(9) from the Kernel API Manual, and the name is literally right here:

• sdma_empty — idle engine test 🦋💅

✨ SYNOPSIS ✨

the signature is giving exactly this, no edits, no cap:

int sdma_empty (struct sdma_engine *sde );

🎀 ARGUMENTS 🎀

there’s exactly one argument, and the manpage is honestly serving -- undescribed -- energy. I can’t invent extra lore, so here’s the whole thing:

• sde — -- undescribed --

🦋 DESCRIPTION 🦋

Currently it’s used by verbs as a latency optimization — that’s the entire description, bestie. Short, sweet, and it ate. 💅

💅 RETURN 💅

return-value vibe check:

• 1 — empty
• 0 — non-empty

so like, 1 means empty and 0 means non-empty, periodt. 🔥

👑 SEE ALSO 👑

bestie, the cross-reference scroll is long and iconic:

• Kernel file ./drivers/infiniband/hw/hfi1/sdma.h
• sdma exported routines(9)
• sdma PSM/verbs API(9)
• Infrastructure calls(9)
• struct sdma_engine(9)
• sdma_running(9)
• sdma_txinit_ahg(9)
• sdma_txinit(9)
• sdma_txadd_page(9)
• sdma_txadd_daddr(9)
• sdma_txadd_kvaddr(9)
• sdma_progress(9)
• struct sdma_map_elem(9)
• sdma_engine_progress_schedule(9)

xoxo, bestie — this cutie is sourced from ./drivers/infiniband/hw/hfi1, dated October 2026, and it’s sdma_empty(9) signing off. stay slay! 💖✨🫶