Subject: Re: sky2 1.3-rc1

From: Stephen Hemminger <[email-masked]>
Date: Fri, 5 May 2006 10:45:36 -0700

On Fri, 5 May 2006 19:35:09 +0200
Thomas Glanzmann <[email-masked]> wrote:

> Hello,
> 
> > >	http://developer.osdl.org/shemminger/prototypes/sky2-1.3-rc1.tar.bz2
> 
> > v0.15:
> > 64 bytes from 10.0.0.138: icmp_seq=2 ttl=64 time=0.467 ms
> 
> > v1.3-rc1:
> > 64 bytes from 10.0.0.138: icmp_seq=4 ttl=64 time=32.9 ms
> 
> I can't confirm this. For me it is just perfect:
> 
> 64 bytes from 89.106.66.1: icmp_seq=1 ttl=64 time=0.278 ms
> 
> 0000:04:00.0 Ethernet controller: Marvell Technology Group Ltd.: Unknown device 4361 (rev 17)
> 
>         Thomas

What is happening is that if there is a misconfiguration and irq routing
is messed up (ie edge trigged). The driver will degenerate to polling every 100ms.
If your system is this misconfigured, then ACPI or the BIOS needs to be fixed
and the driver really only needs to work well enough to get the bug report out ;-)

The older driver was doing rewhacking the Transmit IRQ status timer,
so it would give a bogus transmit status interrupt and that was masking
issues.