Messages in this thread |  | | Subject | Re: zero-copy TCP | Date | Mon, 4 Sep 2000 12:16:23 +0100 (BST) | From | Alan Cox <> |
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> > those pages out of cache which isnt so ideal if the CPU wants > > them. Some of the results are suprisingly counter-intuitive like this > > Does it flush the CPU cache? I thought the CPU just snooped the bus and > updated its cache with new data.
In general no.
> struct page of course). Note that it doesn't matter if another thread, > and this includes truncate/write in another thread, clobbers the page > data. That's just the normal effect of two concurrent writers to the > same memory.
Oh it does matter. You might send out a page of kernel data by mistake, or one some machines take a fault
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