Re: Question from Russells Spinlocks

[Jeff V. Merkey]

Anton Altaparmakov wrote:

> Your last sentence is incorrect.  Spinlocks on 1 CPU machines still need 
> to disable preemption (assuming preemption is compiled in obviously, if 
> not then indeed you are right).  Otherwise preemption could take place in 
> the middle of a data manipulation and you would still have the same race 
> as you described with two cpus working concurrently.  Except that with 
> preemption it is only logical concurrence not actual physical concurrence.
>
> Best regards,
>
> 	Anton
>
>  

Anton is correct in his analysis.

Jeff
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