| To: | "David S. Miller" <davem@xxxxxxxxxx> |
|---|---|
| Subject: | Re: 3c59x |
| From: | Jeff Garzik <jgarzik@xxxxxxxxx> |
| Date: | Tue, 10 Jun 2003 13:25:56 -0400 |
| Cc: | ak@xxxxxxx, bogdan.costescu@xxxxxxxxxxxxxxxxxxxxx, hadi@xxxxxxxxxxxxxxxx, ralph+d@xxxxxxxxx, xerox@xxxxxxxxxx, sim@xxxxxxxxxxxxx, fw@xxxxxxxxxxxxx, netdev@xxxxxxxxxxx, linux-net@xxxxxxxxxxxxxxx |
| In-reply-to: | <20030610.101452.35033262.davem@xxxxxxxxxx> |
| References: | <20030610162342.GB1959@xxxxxxx> <20030610.100209.70199702.davem@xxxxxxxxxx> <20030610171617.GC1959@xxxxxxx> <20030610.101452.35033262.davem@xxxxxxxxxx> |
| Sender: | netdev-bounce@xxxxxxxxxxx |
| User-agent: | Mutt/1.3.28i |
On Tue, Jun 10, 2003 at 10:14:52AM -0700, David S. Miller wrote:
> From: Jeff Garzik <jgarzik@xxxxxxxxx>
> Date: Tue, 10 Jun 2003 13:16:17 -0400
>
> On Tue, Jun 10, 2003 at 10:02:09AM -0700, David S. Miller wrote:
> > This means end users don't see the benefit, so I definitely
> > prefer Andi's idea.
>
> Making every IO a conditional branch? Ug.
>
> A PIO costs hundreds if not thousands of instructions!
> Come on Jeff, get real :-)
MMIO isn't as bad as PIO, and the 'runtime choice' setup implies
slowing down the MMIO path, too.
Jeff
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