nfs_pageio_cond_complete(9)

📦 version 7.3.1, in nixpkgs unstable

💅 nfs_pageio_cond_complete 💅

okay so this is a Kernel API Manual page, bestie — it's nfs_pageio_cond_complete(9), live from the kernel docs, and it's lowkey one of those tiny functions that keeps your whole filesystem from imploding. no cap. 🫶

✨ NAME ✨

nfs_pageio_cond_complete — Conditional I/O completion 🌸

🦋 SYNOPSIS 🦋

void nfs_pageio_cond_complete (struct nfs_pageio_descriptor *desc ,
pgoff_t index );

like, it returns void, so don't go looking for a return value, she gives you nothing back and that's iconic of her 💅

🎀 ARGUMENTS 🎀

  • desc — pointer to io descriptor. yes bestie, the whole descriptor, the main character of this operation 👑
  • index — page index. literally just the page index. that's the vibe check right there.

⭐ DESCRIPTION ⭐

okay so listen, this part is important so put your phone down for a sec 🙈

It is important to ensure that processes don't try to take locks on non-contiguous ranges of pages — because that might deadlock. yes, deadlock. the bad one. the "everything stops forever" one. 😭

So: this function should be called before attempting to wait on a locked nfs_page. It will complete the I/O if the page index index is not contiguous with the existing list of pages in desc.

basically she's the friend who checks the group chat before you send the risky text. if the page doesn't fit the current contiguous run, she completes the I/O and you avoid the whole deadlock situation. periodt. 🔥

bestie please actually call this before you wait on a locked nfs_page, that's the whole entire point, do not skip her 💀

🌈 SEE ALSO 🌈

Kernel file ./fs/nfs/pagelist.c — that's where the lore lives, go read it 🧚

and then the whole friend group, fr fr:

💖 the sign-off 💖

this absolute baddie of a page comes from source ./fs/nfs, dated October 2026, and it lives in the Kernel API Manual. slay. go write some safe contiguous page code, bestie — ily, bye! 🍓✨🦋

📦 where this page comes from