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From: Bartlomiej Zolnierkiewicz <B.Zolnierkiewicz@elka.pw.edu.pl>
To: Jens Axboe <axboe@suse.de>
Subject: Re: serialize access to ide device
Date: Sat, 21 Aug 2004 16:43:55 +0200
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On Saturday 21 August 2004 12:32, Jens Axboe wrote:
> > What about adding new kind of REQ_SPECIAL request and converting
> > set_using_dma(), set_xfer_rate(), ..., to be callback functions for this
> > request?
> >
> > This should be a lot cleaner and will cover 100% cases.
>
> That will still only serialize per-channel. But yes, a lot cleaner.

per hwgroup not per channel
(serializing per host device will be better but requires even more work)