Nick Piggin <[EMAIL PROTECTED]> wrote: > [ This is true for x86's sfence/lfence, but raises a question about Linux's > memory barriers. Does anybody expect that a sequence of smp_wmb and smp_rmb > would ever provide a full smp_mb barrier? I've always assumed no, but I > don't know if it is actually documented? ]
I think you have to assume that smp_wmb() only orders stores and write barriers, and that smp_rmb() only orders reads and read barriers. smp_mb() implies both smp_wmb() and smp_rmb(), but is greater than the combination of the two. David - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
