gfs2_log_try_reserve(9)

💖 gfs2_log_try_reserve(9) 💖

okay so bestie, welcome to the Kernel API Manual — this page is literally about gfs2_log_try_reserve(9), and it’s giving “try to make a log reservation” energy. no cap. 💅

✨ NAME ✨

gfs2_log_try_reserve — Try to make a log reservation

🌸 SYNOPSIS 🌸

       bool gfs2_log_try_reserve (struct gfs2_sbd *sdp , struct gfs2_trans *tr
       , unsigned int *extra_revokes );

🎀 ARGUMENTS 🎀

• sdp — The GFS2 superblock. iconic struct, no notes. 💖
• tr — The transaction. yes bestie, that transaction. ✨
• extra_revokes — The number of additional revokes reserved (output). it’s an output, so it’s giving results back. 🫶

🦋 DESCRIPTION 🦋

So this one is similar to gfs2_log_reserve, but there’s a lock situation: sdp->sd_log_flush_lock must be held for correct revoke accounting. periodt.

lock check, bestie: sdp->sd_log_flush_lock has to be held. not optional, not a vibe — it’s for correct revoke accounting. 💀

🔥 SEE ALSO 🔥

Kernel file ./fs/gfs2/log.c — and the whole ensemble cast:

• Kernel file ./fs/gfs2/log.c
• gfs2_struct2blk(9)
• gfs2_remove_from_ail(9)
• gfs2_ail1_start_one(9)
• gfs2_ail1_flush(9)
• gfs2_ail1_start(9)
• gfs2_ail1_empty_one(9)
• gfs2_ail1_empty(9)
• gfs2_log_is_empty(9)
• gfs2_log_release_revokes(9)
• gfs2_log_release(9)
• __gfs2_log_try_reserve(9)
• __gfs2_log_reserve(9)
• gfs2_log_reserve(9)
• log_distance(9)
• calc_reserved(9)
• gfs2_flush_revokes(9)
• gfs2_write_log_header(9)
• log_write_header(9)
• gfs2_ail_drain(9)
• empty_ail1_list(9)
• gfs2_trans_drain(9)
• __gfs2_log_flush(9)
• gfs2_merge_trans(9)
• gfs2_log_commit(9)
• gfs2_log_shutdown(9)
• gfs2_logd(9)

cute sign-off time: this page’s source/version is ./fs/gfs2, and the date is October 2026 — that’s the footer, bestie, bye! 💅✨