Messages in this thread | | | Date | Mon, 7 May 2001 11:21:13 -0700 (PDT) | From | dean gaudet <> | Subject | Re: [Question] Explanation of zero-copy networking |
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On Mon, 7 May 2001, Alan Cox wrote:
> > documented so far) detailed description of the newly > > implemented zero-copy mechanisms in the network-stack. > > We are interested in how to use it (changed network-API?) > > and also in the internal architecture. > > It is built around sendfile. Trying to do zero copy on pages with user space > mappings get so horribly non pretty it is better to build the API from the > physical side of things.
so there's still single copy for write() of a mmap()ed page?
since i'm naive about the high-end databases -- do they have a mechanism to access zero-copy? i suppose sendfile() on a raw device fd would work... nice.
-dean
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