On Fri, 3 Sep 1999 19:14:09 +0200 (CEST), Andrea Arcangeli
<andrea@suse.de> said:
> On Fri, 3 Sep 1999, Stephen C. Tweedie wrote:
>> the IO for write, after the IO for read. Nobody else has to know. We
>> already implement bounce buffers underneath the ll_rw_block interface
>> for some ISA devices and it works just fine.
> If I understood well you want to do the copy of only of the current
> req->bh and not of all the list of bh queued following the
> req->bh->b_reqnext pointer.
Yes. We already have per-bh completion callbacks, so there's no need
(or desire) to wait for the whole request chain to complete.
> So you are supposing that only the DMA lowlevel drivers are following
> the b_reqnext pointer.
How does that follow?
--Stephen
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