Re: [Kiobuf-io-devel] RFC: Kernel mechanism: Compound event wait /notify + callback chains

Christoph Hellwig (
Thu, 1 Feb 2001 20:00:55 +0100

On Thu, Feb 01, 2001 at 06:57:41PM +0000, Alan Cox wrote:
> Not for raw I/O. Although for the drivers that can't cope then going via
> the page cache is certainly the next best alternative

True - but raw-io has it's own alignment issues anyway.

> Yes. You also need a way to describe it in terms of page * in order to do
> mm locking for raw I/O (like the video capture stuff wants)

Right. (That's why we have the struct page * always as part of the structure)

> Certainly having the lightweight one a subset of the heavyweight one is a good
> target.

Yes, I'm trying to address that...


Of course it doesn't work. We've performed a software upgrade.
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