Re: suspend2 merge (was Re: [Suspend2-devel] Re: CFS and suspend2: hang in atomic copy)

["H. Peter Anvin" <hpa@zytor.com>]

Linus Torvalds wrote:
> 
> On Thu, 26 Apr 2007, Pavel Machek wrote:
>> Ok, I guess I'll have nightmares of DMA controllers doing DMAs from
>> chips that are no longer there tonight.
> 
> Umm. Welcome to the 21st century: we don't do that "separate DMA 
> controller" thing any more. All devices do their own DMA.
> 

That was the 1990s.  On a brand new server system:

00:08.0 System peripheral: Intel Corporation 5000 Series Chipset DMA
Engine (rev b1)

For better or worse, slave DMA seems to be making a comeback of sorts.
Not to mention all kinds of embedded crap^Whardware with optimized DMA
engines which look nothing like PCI at all.

	-hpa
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