Re: [PATCH] starfire reads irq before pci_enable_device.

[Ion Badulescu]

On Fri, 9 Feb 2001, Alan Cox wrote:

> > It's amusing that a full receive copy is added without any concern, in
> > the same discussion where zero-copy transmit is treated as a holy grail!
> 
> For non routing paths its virtually free because the DMA forced the lines
> from cache anyway. 

Are you actually sure about this? I thought DMA from PCI devices reached 
the main memory without polluting the L2 cache. Otherwise any large DMA 
transfer would kill the cache (think frame grabbers...)

Ion

-- 
  It is better to keep your mouth shut and be thought a fool,
            than to open it and remove all doubt.

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