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Commite452019

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Mark FastPathStrongRelationLocks volatile.
Otherwise, the compiler might decide to move modifications to datawithin this structure outside the enclosing SpinLockAcquire /SpinLockRelease pair, leading to shared memory corruption.This may or may not explain a recent lmgr-related buildfarm failureon prairiedog, but it needs to be fixed either way.
1 parentac2063a commite452019

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‎src/backend/storage/lmgr/lock.c‎

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@@ -238,7 +238,7 @@ typedef struct
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uint32count[FAST_PATH_STRONG_LOCK_HASH_PARTITIONS];
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}FastPathStrongRelationLockData;
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FastPathStrongRelationLockData*FastPathStrongRelationLocks;
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volatileFastPathStrongRelationLockData*FastPathStrongRelationLocks;
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/*

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