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From: Alan Cox <alan@redhat.com>
Message-Id: <200102091049.f19Anjk06651@devserv.devel.redhat.com>
Subject: Re: [PATCH] starfire reads irq before pci_enable_device.
To: becker@scyld.com (Donald Becker)
Date: Fri, 9 Feb 2001 05:49:45 -0500 (EST)
Cc: ionut@cs.columbia.edu (Ion Badulescu),
        jgarzik@mandrakesoft.com (Jeff Garzik), alan@redhat.com (Alan Cox),
        linux-kernel@vger.kernel.org, jes@linuxcare.com
In-Reply-To: <Pine.LNX.4.10.10102081924330.7141-100000@vaio.greennet> from "Donald Becker" at Feb 08, 2001 07:44:24 PM
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> 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. Basically its a deficiency in the chipset. We don't support
chipsets with alignment rules well on cpus with alignment rules that clash

That shouldnt be a suprise

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