Re: [patch] epoll use a single inode ...

[Anton Blanchard]

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 majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/