Messages in this thread | | | From | "Stephen C. Tweedie" <> | Date | Fri, 3 Sep 1999 22:15:37 +0100 (BST) | Subject | Re: CONFIG_BIGMEM and rawio |
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Hi,
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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