Re: Updated 2.4 status/todo list

From: Alan Cox (alan@lxorguk.ukuu.org.uk)
Date: Fri Jul 28 2000 - 16:14:19 EST


> * MMIO Writes may be combined, but are not re-ordered, and MMIO writes
> never pass MMIO reads. (so, an MMIO read is one way to flush any
> pending writes)

Except if the MMIO area is marked prefetchable and the chipset prefetched
it on you. PCI comes with a wide variety of advanced techniques for leaving
bulletholes in your boots

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