nft_pipapo_avx2_refill(9)

📦 version 7.3.1, in nixpkgs unstable

💅 nft_pipapo_avx2_refill(9) — like, the Kernel API Manual, bestie ✨

okay so picture this: you're deep in the nft_pipapo_avx2 corner of the kernel — yes, that's the manual name, we're in Kernel API Manual territory — and you need a bitmap refilled. This function is literally the AVX2-flavored twin of pipapo_refill, and she's here to help. 🦋

✨ NAME ✨

nft_pipapo_avx2_refill — scan a bitmap, pick the mapping table item, set the bits. That's the whole vibe. 💅

🌸 SYNOPSIS 🌸

int nft_pipapo_avx2_refill (int offset , unsigned long *map , unsigned long *dst , union nft_pipapo_map_bucket *mt , bool last );

🎀 ARGUMENTS 🎀

  • offset — start scanning from this bitmap (which is basically a bucket) offset, measured in longs. like, longs the integer type, not "long" the adjective 😭
  • map — the bitmap that gets scanned for set bits. this is the main character here fr.
  • dst — the destination bitmap. where the bits end up living 💖
  • mt — the mapping table, holding all the bit set specifiers.
  • last — if this is the last field, return the index of the first set bit instead. lowkey changes the whole return value, so pay attention 👀

🔥 DESCRIPTION 🔥

So this is an alternative implementation of pipapo_refill, and she's specifically built to be used with the AVX2 lookup routines. The tea: we know there are four words to be scanned, at a given offset inside the map, for each matching iteration. That's the deal. ✨

⚠️ The caller must ensure at least one bit in those four words is set. That's on you, bestie, not on her.

And the plot twist you know is coming: this function doesn't actually use any AVX2 instruction. 💀 iconic behavior honestly, she's in the AVX2 club but she's not using any AVX2 instructions. we love a queen who just shows up.

🌈 RETURN 🌈

  • the first set bit index if last is set ✨
  • otherwise, the index of the first filled word 🫶

🧚 SEE ALSO 🧚

Kernel file ./net/netfilter/nft_set_pipapo_avx2.c — go read the source, iykyk 📖

the whole friend group, assembled. 👑

okay that's the whole page bestie, no cap. this came to you from ./net/netfilter, dated October 2026, and it's the nft_pipapo_avx2_refill(9) era — go forth and refill those bitmaps, you're gonna slay 💖✨🎀

📦 where this page comes from