With this two additional changes:
diff --git a/src/backend/storage/aio/aio.c b/src/backend/storage/aio/aio.c
index 6c6c0a908e2..6dd2816bea9 100644
--- a/src/backend/storage/aio/aio.c
+++ b/src/backend/storage/aio/aio.c
@@ -538,6 +538,9 @@ pgaio_io_process_completion(PgAioHandle *ioh, int
result)
pgaio_io_update_state(ioh, PGAIO_HS_COMPLETED_SHARED);
+ /* ensure the state update is visible before we broadcast
condition variable */
+ pg_write_barrier();
+
/* condition variable broadcast ensures state is visible before
wakeup */
ConditionVariableBroadcast(&ioh->cv);
bool only_running);
diff --git a/src/include/storage/aio_internal.h
b/src/include/storage/aio_internal.h
index 2d37a243abe..0a2bb109696 100644
--- a/src/include/storage/aio_internal.h
+++ b/src/include/storage/aio_internal.h
@@ -96,13 +96,13 @@ struct ResourceOwnerData;
struct PgAioHandle
{
/* all state updates should go through pgaio_io_update_state() */
- PgAioHandleState state:8;
+ uint8 state;
/* what are we operating on */
- PgAioTargetID target:8;
+ uint8 target;
/* which IO operation */
- PgAioOp op:8;
+ uint8 op;
/* bitfield of PgAioHandleFlags */
uint8 flags;
the problem is not reproduced at my system within 20000 seconds. I will
leave it to run during the night.
