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pgsql: Fix stale idle flag when IO workers exit.

From:	Thomas Munro <tmunro(at)postgresql(dot)org>
To:	pgsql-committers(at)lists(dot)postgresql(dot)org
Subject:	pgsql: Fix stale idle flag when IO workers exit.
Date:	2025-07-12 01:33:05
Message-ID:	E1uaP6v-005qSi-2X@gemulon.postgresql.org
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Fix stale idle flag when IO workers exit.

Otherwise we could choose a worker that has exited and crash while
trying to wake it up.

Back-patch to 18.

Reported-by: Tomas Vondra <tomas(at)vondra(dot)me>
Reported-by: Andres Freund <andres(at)anarazel(dot)de>
Discussion: https://postgr.es/m/t5aqjhkj6xdkido535pds7fk5z4finoxra4zypefjqnlieevbg%40357aaf6u525j

Branch
------
master

Modified Files
--------------
src/backend/storage/aio/method_worker.c | 2 ++
1 file changed, 2 insertions(+)

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