Hi, > Well, PowerPC "dcbt" does prefetch() correctly, it doesn't ever raise > exceptions, doesn't have any side effects, takes only enough CPU to > decode the address, and is ignored if it would have to do anything > other than load the cacheline from RAM. Prefetch streams are halted > when they reach the end of a page boundary (no trapping to the MMU) > and if the TLB entry isn't present then they would asynchronously > abort.
It depends on the implementation and the HID bit settings. Some do walk the MMU hashtable if it isnt in the TLB. Anton - 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/
