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nwhitehorn
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2012-04-22T20:23:34.986039Z
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V 243
On non-64-bit systems (which generally don't have lwsync), use eieio and
isync to implement read and write barriers, following Appendix B.2 of
Book II of the architecture manual. This provides a 25% speed increase
to fork() on the PowerPC G4.

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