Messages in this thread | | | Date | Thu, 8 Mar 2007 20:52:32 -0600 | From | Anton Blanchard <> | Subject | Re: [patch] epoll use a single inode ... |
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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.
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