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Commit07cb8b0

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Replace ia64 S_UNLOCK compiler barrier with a full memory barrier.
_Asm_sched_fence() is just a compiler barrier, not a memory barrier. Butspinlock release on IA64 needs, at the very least, releasesemantics. Use a full barrier instead.This might be the cause for the occasional failures on buildfarm memberanole.Discussion: 20150629101108.GB17640@alap3.anarazel.de
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‎src/include/storage/s_lock.h

Lines changed: 1 addition & 1 deletion
Original file line numberDiff line numberDiff line change
@@ -806,7 +806,7 @@ typedef unsigned int slock_t;
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/* On IA64, it's a win to use a non-locking test before the xchg proper */
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#defineTAS_SPIN(lock)(*(lock) ? 1 : TAS(lock))
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#defineS_UNLOCK(lock)\
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do {_Asm_sched_fence(); (*(lock)) = 0; } while (0)
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do {_Asm_mf(); (*(lock)) = 0; } while (0)
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#endif/* HPUX on IA64, non gcc */
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