> After commenting out clear_kernel_mapping() line, the system would > have sync flood and reset from time to time. However when with this > clear_kernel_mapping() line, no system reset happened.
Hmm, that should not happen. Normally the problems fixed by this are expected to be very rare and you also should not get sync flood, but just cache line corruption. While it might be possible for random corruption to then cause sync flood that should be again rather unlikely. If it's repeatable quickly something else must be wrong. > > As we know that CPU prefetch never cross the page boundary, in this That only applies to sequential prefetch. But speculative execution can prefetch pretty much any address. That is why the clear_kernel_mapping is needed. -Andi - 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/
