Re: [PATCH] starfire reads irq before pci_enable_device.

From: Ion Badulescu (
Date: Fri Feb 09 2001 - 18:32:35 EST

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...)


  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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