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Re: 2.6.10 TCP troubles -- suggested patch

To: Stephen Hemminger <shemminger@xxxxxxxx>
Subject: Re: 2.6.10 TCP troubles -- suggested patch
From: "David S. Miller" <davem@xxxxxxxxxxxxx>
Date: Fri, 11 Feb 2005 17:07:40 -0800
Cc: hubert.tonneau@xxxxxxxxxxxxxx, romieu@xxxxxxxxxxxxx, kuznet@xxxxxxxxxxxxx, niv@xxxxxxxxxx, rick.jones2@xxxxxx, netdev@xxxxxxxxxxx
In-reply-to: <20050211150420.74737b2e@xxxxxxxxxxxxxxxxx>
References: <0525M9211@xxxxxxxxxxxxxxxxxxxxx> <20050211150420.74737b2e@xxxxxxxxxxxxxxxxx>
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On Fri, 11 Feb 2005 15:04:20 -0800
Stephen Hemminger <shemminger@xxxxxxxx> wrote:

> Still not setting Push sufficiently to keep MacOSX happy.

I don't think it's the kernel's fault in this case.

This set of data frames you quoted are all full, and
are tightly interspaced.  It looks exactly like a TSO
frame, which we certainly set PSH on, but the TSO
engine is dropping it aparently.

I guess this is e1000.  Any e1000 internals experts reading
here who can comment on how e1000's TSO engine treats the
PSH flag?

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