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

From: Alan Cox (
Date: Sun Feb 04 2001 - 11:46:39 EST

> 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


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This archive was generated by hypermail 2b29 : Wed Feb 07 2001 - 21:00:19 EST