Re: [patch] possible SMP races all over the place in wait_event interface

[Ingo Molnar]

On Tue, 24 Aug 1999, David S. Miller wrote:

>    This 'merges' the barrier and the write. Or rather, in asm-i386 we could
>    do something like: 
> 
>    #define set_mb(addr,val) xchgl(addr,val)
> 
>    and then use set_barrier().
> 
> Sure, but it costs ~8 instructions instead of 2 on ll/sc architectures.

i was not clear enough - this is why i said 'in i386-asm'. Other (saner) 
architectures can use normal writes and sane barriers.

-- mingo

-
Linux SMP list: FIRST see FAQ at http://www.irisa.fr/prive/mentre/smp-faq/
To Unsubscribe: send "unsubscribe linux-smp" to [EMAIL PROTECTED]