drm_clflush_virt_range(9)

📦 version 7.3.1, in nixpkgs unstable

💖 drm_clflush_virt_range — like, the Kernel API Manual page you actually wanna read 💖

okay so bestie, welcome to the glow-up of drm_clflush_virt_range(9) from the Kernel API Manual ✨ honestly? iconic little function. tiny signature, huge responsibility. let's get into it 🫶

🌸 NAME 🌸

drm_clflush_virt_range — flush dcache lines of a region 💅

like, the whole vibe: you point at a chunk of memory, it makes sure the data cache isn't lying to you. no cap.

✨ SYNOPSIS ✨

void drm_clflush_virt_range (void *addr , unsigned long length );

that's it. that's the whole thing. two arguments, no return value, zero drama 🎀

🦋 ARGUMENTS 🦋

  • addr — Initial kernel memory address. like, where the region starts. the starting point. the main character address 👑
  • length — Region size. how far we're going, bestie. the whole stretch of memory we care about 🌈

💜 DESCRIPTION 💜

Flush every data cache line entry that points to an address in the region requested ✨

fr fr, that's the entire job — any cache line that's touching any address inside the region you handed over? flushed. gone. done. did it eat? yes it ate 💅

lowkey important: this is about dcache lines, not vibes. it flushes what points into the region, periodt.

🔥 SEE ALSO 🔥

Kernel file ./drivers/gpu/drm/drm_cache.c — that's where the magic lives, iykyk 🧚

go read the siblings, they're all giving cache-coherence realness 😭💖

and that's the page, bestie!! this little baddie comes to you from ./drivers/gpu/drm and it's dated October 2026 ⭐ go forth, flush responsibly, and remember: drm_clflush_virt_range(9) would never leave you with a stale cache line 🎀💅✨

📦 where this page comes from