Horton

bufmgr: Remove the, now obsolete, BM_JUST_DIRTIED

Andres Freund <andres@anarazel.de>

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Commit: b0f4ff3c92664e28615e2f885195c803156d47eb
Author: Andres Freund <andres@anarazel.de>
Date: 2026-03-11T18:58:29Z
Releases: 19 (unreleased) 
bufmgr: Remove the, now obsolete, BM_JUST_DIRTIED

Due to the recent changes to use a share-exclusive mode for setting hint bits
and for flushing pages - instead of using share mode as before - a buffer
cannot be dirtied while the flush is ongoing.  The reason we needed
JUST_DIRTIED was to handle the case where the buffer was dirtied while IO was
ongoing - which is not possible anymore.

Discussion: https://postgr.es/m/5ubipyssiju5twkb7zgqwdr7q2vhpkpmuelxfpanetlk6ofnop@hvxb4g2amb2d

Files

PathChange+/−
src/backend/storage/buffer/bufmgr.c modified +9 −21
src/backend/storage/buffer/localbuf.c modified +1 −1
src/include/storage/buf_internals.h modified +1 −2

Discussion