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Re: [Xen-devel] help with horrible network failures

To: xen-devel@xxxxxxxxxxxxxxxxxxxxx
Subject: Re: [Xen-devel] help with horrible network failures
From: Jon Mason <jdmason@xxxxxxxxxx>
Date: Wed, 2 Mar 2005 14:07:08 -0600
Cc: Nivedita Singhvi <niv@xxxxxxxxxx>, Rob Gardner <rob.gardner@xxxxxx>
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On Wednesday 02 March 2005 12:37 pm, Nivedita Singhvi wrote:
> Rob Gardner wrote:
> > The machine with the problem:
> > Intel e100 nic
> > 1.7 Ghz Xeon
> Yep, practically all instances of this problem were
> with the e100. Unfortunately, the current version
> of the driver no longer has NAPI as a dynamically
> tunable parameter via ethtool. It can be disabled
> via a kernel config parameter (CONFIG_E100_NAPI).
> You could recompile and see if the problem disappears.
> (Not a real fix).

This isn't quite true.  Though a compile option until recently, it was 
discovered that e100 had NAPI hooks regardless of config enablement.  The 
compile option has been removed from the latest kernels.  

> I'd be very interested if you could switch to tg3
> on the other box too, and see if you can reproduce
> the problem. It all depends on the traffic, phase
> of the moon, etc..
> > The machine that does not exhibit the problem:
> > Tigon3 nic
> > 2.6Ghz P4
> Your sysctl settings would be helpful, too..
> thanks,
> Nivedita

Jon Mason

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