From: Benjamin LaHaise <[email protected]>
Date: Mon, 6 Mar 2006 21:07:36 -0500
> On Tue, Mar 07, 2006 at 04:04:11AM +0200, Dan Aloni wrote:
> > This somehow resembles the scatter-gatter lists already used in some
> > subsystems such as the SCSI sg driver.
>
> None of the iovecs are particularly special. What's special here is that
> particulars of the container make the fast path *cheap*.
Please read Druschel and Peterson's paper on fbufs and any followon
work before going down this path. Fbufs are exactly what you are
proposing as a workaround for the VM cost of page flipping, and the
idea has been around since 1993. :-)
As I mentioned Chapter 5 of Networking Algorithmics discusses this
in detail, and also covers many related attempts such as I/O
Lite.
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