* H. Peter Anvin <hpa@xxxxxxxxx> wrote: > CLFLUSH is only (guaranteed to be) ordered with respect to MFENCE > according to the SDM. Yes, I quoted the relevant text a couple of hours ago, CLFLUSH is pretty special, so it's not ordered against atomics or serializing instructions for example - only ordered against explict MFENCE calls, which on x86 is mb()/smp_mb(). Thanks, Ingo -- To unsubscribe from this list: send the line "unsubscribe stable" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html