Re: [Kiobuf-io-devel] RFC: Kernel mechanism: Compound event wait

Alan Cox
2001-02-04T16:46:18Z

> It appears that we are coming across 2 kinds of requirements for kiobuf
> vectors - and quite a bit of debate centering around that.
>
> 1. In the block device i/o world, where large i/os may be involved, we'd
> 2. In the networking world, we deal with smaller fragments (for protocol

Its probably worth commenting at this point that the I2O message passing layers
do indeed have both #1 and #2 type descriptor chains to optimise performance
for different tasks. We arent the only people to hit this.

I2O supports
offset, pagelist, length

where the middle pages in the list are entirely copied

And sets of
addr, len

tuples.