Back-patch b1ffe3ff into REL_13_STABLE. This is a cherry pick of 4c8e00ae from the 14 branch into the 13 branch.
It avoids an assertion failure when ForwardSyncRequest() tries to allocate memory while trying to compact the queue, if run in a critical section. RelationTruncate() gained a critical section in 38c579b0, and could fail in that way in the 13 branch. b1ffe3ff originally fixed the same problem with TruncateMultiXact(), but for that case it only needed to go back as far as 14, where SLRUs started using the sync request queue. It also fixed a related deadlock risk that doesn't apply in this case (this case doesn't wait), but it might exist in theory and it doesn't hurt to keep the code the same as later branches. Author: Heikki Linnakangas <heikki.linnakan...@iki.fi> (original commit) Reviewed-by: Michael Paquier <mich...@paquier.xyz> (in this new context) Reported-by: Yura Sokolov <y.soko...@postgrespro.ru> Discussion: https://postgr.es/m/f98aaa79-80b5-47c9-832a-31416a3a528b%40postgrespro.ru Branch ------ REL_13_STABLE Details ------- https://git.postgresql.org/pg/commitdiff/a722252ef1e1980fb697fe5cff7506245aec5f07 Modified Files -------------- src/backend/access/transam/xlog.c | 7 +++++++ src/backend/postmaster/checkpointer.c | 4 ++++ 2 files changed, 11 insertions(+)
