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Subject: Re: [Kiobuf-io-devel] RFC: Kernel mechanism: Compound event wait /notify + callback chains
To: sct@redhat.com (Stephen C. Tweedie)
Date: Mon, 5 Feb 2001 17:29:47 +0000 (GMT)
Cc: alan@lxorguk.ukuu.org.uk (Alan Cox), sct@redhat.com (Stephen C. Tweedie),
        manfred@colorfullife.com (Manfred Spraul),
        torvalds@transmeta.com (Linus Torvalds),
        hch@caldera.de (Christoph Hellwig), lord@sgi.com (Steve Lord),
        linux-kernel@vger.kernel.org, kiobuf-io-devel@lists.sourceforge.net
In-Reply-To: <20010205172042.O1167@redhat.com> from "Stephen C. Tweedie" at Feb 05, 2001 05:20:42 PM
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From: Alan Cox <alan@lxorguk.ukuu.org.uk>
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> > 	kiovec_align(kiovec, 512);
> > and have it do the bounce buffers ?
> 
> _All_ drivers would have to do that in the degenerate case, because
> none of our drivers can deal with a dma boundary in the middle of a
> sector, and even in those places where the hardware supports it in
> theory, you are still often limited to word-alignment.

Thats true for _block_ disk devices but if we want a generic kiovec then
if I am going from video capture to network I dont need to force anything more
than 4 byte align

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