Messages in this thread | | | Date | Tue, 24 Aug 1999 10:34:44 -0400 (EDT) | From | Ingo Molnar <> | Subject | Re: [patch] possible SMP races all over the place in wait_event interface |
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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
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