> 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.
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