__gfs2_log_flush(9)

📦 version 7.3.1, in nixpkgs unstable

💫 __gfs2_log_flush(9) — the kernel API manual, but make it make sense 💫

okay bestie, so this is a page from the Kernel API Manual and the function we're hyping up today is __gfs2_log_flush — yes the double-underscore one, she's built different 💅

✨ NAME ✨

__gfs2_log_flush — flush incore transaction(s) 🚽✨ (no but literally, that's what she does)

🦋 SYNOPSIS 🦋

void __gfs2_log_flush (struct gfs2_sbd *sdp , struct gfs2_glock *gl ,
u32 flags );

like, that's the whole signature, no cap. returns void, so don't go looking for a return value bestie, she gives you nothing back and she's iconic for it 🫶

🌸 ARGUMENTS 🌸

  • sdp — The filesystem. yeah. the whole filesystem. main character energy fr fr 👑
  • gl — The glock structure to flush. If NULL, flush the whole incore log — so passing NULL means she goes full send on everything 😭
  • flags — The log header flags: GFS2_LOG_HEAD_FLUSH_* and debug flags 🎀 (yeah it's a whole family of constants plus the debug ones, noted)

🎀 SEE ALSO 🎀

lowkey the friend group here is huge, so let's do a vibe check on everyone she's linked with 💖

the kernel source file where she actually lives:

./fs/gfs2/log.c

and the whole crew, exactly as listed (yes all of them, I'm not skipping a single one, that's not the energy we're on ✨):

bestie note: __gfs2_log_try_reserve(9) and __gfs2_log_reserve(9) are the underscored twins of gfs2_log_try_reserve(9) and gfs2_log_reserve(9) — look closely, they're different entries, don't let anyone tell you otherwise 🙈

and that's the whole page, we ate and left no crumbs 🍓

kisses from ./fs/gfs2 — dated October 2026, so mark your calendar babe ⭐💜

📦 where this page comes from