Re: PCI MMIO flushing and stuff (was Re: 2.2.15 with eepro100: eth0:

From: Rogier Wolff (R.E.Wolff@BitWizard.nl)
Date: Sun May 21 2000 - 02:31:37 EST

Alan Cox wrote:
> > What happens when PCI DMA writes to an address which is currently clean
> > within a CPU cache?
>
> It goes dirty

Are you sure? It should be invalidated shouldn't it?

(Dirty is: "The contents still need to be written back" and invalid is:
"this cache line is empty".)

                                        Roger. 

-- 
** R.E.Wolff@BitWizard.nl ** http://www.BitWizard.nl/ ** +31-15-2137555 **
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