__gfs2_log_try_reserve(9)

📦 version 7.3.1, in nixpkgs unstable

💫 __gfs2_log_try_reserve — it's the kernel API manual bestie ✨

okay so this is __gfs2_log_try_reserve, from the Kernel API Manual, and it's genuinely one of those little functions that's like "I'm gonna try my best and if I can't, I'm out" — which honestly, relatable 💅

🎀 SYNOPSIS 🎀

bool __gfs2_log_try_reserve (struct gfs2_sbd *sdp , unsigned int blks ,
       unsigned int taboo_blks );

like look at that signature. she returns a bool, she takes three args, she's not here to wait around 🔥

🌸 ARGUMENTS 🌸

  • sdp — The GFS2 superblock 💖 this is the whole vibe container, the main character of the filesystem, and you hand her over as a struct gfs2_sbd *.
  • blks — The number of blocks to reserve 🎀 how many she's asking for, as an unsigned int.
  • taboo_blks — The number of blocks to leave free 🙈 as in, off-limits, do-not-touch, unsigned int — that many blocks stay untouched no matter what.

🦋 DESCRIPTION 🦋

So basically ✨ — this tries to do the exact same thing as __gfs2_log_reserve, no cap, same mission. But here's the twist: if there is no more log space immediately available, she does not wait. She fails. Periodt. 💀

it's giving "I'll check if there's room and if not, I'm leaving" — a try-not-block situation, which is literally in the name iykyk

👑 SEE ALSO 👑

the kernel file is ./fs/gfs2/log.c 🫶 and here's the whole squad, copy-pasted with love:

🌈 and that's the whole page, bestie! shoutout to ./fs/gfs2 and the date stamp October 2026, and of course the page herself, __gfs2_log_try_reserve(9) — she tried, she reserved, she dipped if she couldn't 💜🧚⭐

📦 where this page comes from