RE: Synchronizing Bit operations V2

From: Chen, Kenneth W <>
Date: 2006-03-31 14:11:47
Christoph Lameter wrote on Thursday, March 30, 2006 7:09 PM
> I was referring to the LOCK prefix. Doesnt that insure the processor to 
> go into a special state and make the bus go into a special state that 
> implies a barrier?

Yes, that's why on i386 both smp_mb__before_clear_bit() and 
smp_mb__after_clear_bit() are noop.
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Received on Fri Mar 31 14:11:38 2006

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