Re: [Kiobuf-io-devel] RFC: Kernel mechanism: Compound event wait
Jens Axboe (axboe@suse.de)
Tue, 6 Feb 2001 18:14:49 +0100
On Tue, Feb 06 2001, Stephen C. Tweedie wrote:
> > I don't think os. If we minimize the state in the IO container object,
> > the lower levels could split them at their guess and the IO completion
> > function just has to handle the case that it might be called for a smaller
> > object.
>
> The whole point of the post was that it is merging, not splitting,
> which is troublesome. How are you going to merge requests without
> having chains of scatter-gather entities each with their own
> completion callbacks?
You can't, the stuff I played with turned out to be horrible. At
least with the current kiobuf I/O stuff, merging will have to be
done before its submitted. And IMO we don't want to loose the
ability to cluster buffers and requests in ll_rw_blk.
--
Jens Axboe
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
Please read the FAQ at http://www.tux.org/lkml/