lpfc_drain_txq(9)

📦 version 7.3.1, in nixpkgs unstable

💅 lpfc_drain_txq(9) 💅

okay so this is a page from the Kernel API Manual — yes, that Kernel API Manual — and today's main character is lpfc_drain_txq. she drains the txq. that's it, that's the whole personality. let's get into it 🫶

✨ NAME ✨

lpfc_drain_txq — literally just "Drain the txq", no notes, iconic brevity 💅

🦋 SYNOPSIS 🦋

uint32_t lpfc_drain_txq (struct lpfc_hba *phba );

one function, one argument, one uint32_t coming back at you. clean. minimal. slay ✨

🎀 ARGUMENTS 🎀

  • phba — Pointer to HBA context object. that's your HBA's whole little world right there, everything she needs to know about herself 🌸

👑 DESCRIPTION 👑

so what's she actually doing? this function attempt to submit IOCBs on the txq to the adapter. periodt. that's the whole gig 🔥

for SLI4 adapters specifically, the txq contains ELS IOCBs that have been deferred because the there are no SGLs — like, imagine a whole queue of IOCBs just sitting there waiting because there's no SGL room, and nobody's coming to get them 😭 this is the girl who finally opens the door.

and when does this traffic jam even happen? this congestion can occur with large vport counts during node discovery. so: lots of vports, node discovery time, and suddenly the txq is giving "line around the block at the club" energy 💀 and she's the one handling it. main character energy fr fr.

🌈 SEE ALSO 🌈

bestie, are you ready. brace yourself. this list is long long. like, scroll-for-a-while long. but every single one of these is a real one so we're listing them all, no skips, no cuts, we respect the lore 👑

Kernel file ./drivers/scsi/lpfc/lpfc_sli.c — and then, in order:

and that's the list. yes, all of them. we ate that 💅✨

ok that's the whole page bestie, go drain a txq responsibly 🫶

and finally, the cute little sign-off: this page lives in ./drivers/scsi/lpfc, and it's dated October 2026 💖 mwah, bye 👋🎀

📦 where this page comes from