netdev - Re: [PATCH 1/8] e1000e: cleanup several stats issues

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Date:	Fri, 25 Apr 2008 02:01:29 -0400
From:	Jeff Garzik <jeff@...zik.org>
To:	Auke Kok <auke-jan.h.kok@...el.com>
CC:	netdev@...r.kernel.org, e1000-devel@...ts.sourceforge.net
Subject: Re: [PATCH 1/8] e1000e: cleanup several stats issues

Auke Kok wrote:
> From: Bruce Allan <bruce.w.allan@...el.com>
> 
> Several stats registers are completely unused and we just waste pci
> bus time reading them. We also omit using the high 32 bits of the GORC/
> GOTC counters. We can just read clear them and only read the low registers.
> 
> Mii-tool can also break es2lan if it executes a MII PHY register
> ioctl while the device is in autonegotiation. Unfortunately it seems
> that several applications and installations still perform this ioctl
> call periodically and especially in this crucial startup time. We
> can fool the ioctl by providing fail safe information that mimics
> the "down" link state and only perform the dangerous PHY reads once
> after link comes up to fill in the real values. As long as link
> stays up the information will not change.
> 
> Signed-off-by: Bruce Allan <bruce.w.allan@...el.com>
> Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@...el.com>
> Signed-off-by: Jesse Brandeburg <jesse.brandeburg@...el.com>
> Signed-off-by: Auke Kok <auke-jan.h.kok@...el.com>

applied 1-8

I was mainly waiting for the discussion of the abuse of the ethtool 
interface, which I chose to allow.

Now, send me a patch to the ethtool man page for this new behavior :)


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