From: Joe Korty <[EMAIL PROTECTED]>
Date: Wed, 23 Nov 2005 16:32:55 -0500

> On Thu, Nov 24, 2005 at 08:11:05AM +1100, Herbert Xu wrote:
> 
> > Please try turning sg and tso off to see if it helps.
> 
>       tso     sg      result
>       ------  ------  ------
>       on      on      stallout
>       on      off     works
>       off     on      works
>       off     off     works
> 
> From your previous letter: I swapped the two ethernet
> cables going into buttercup; the scp still stalls out with
> tso=on and sg=on.

Yes, and even with the change you quoted removed, you would still
wedge the card by doing sendfile() based transfers over that e1000
card under load.  That change just made an existing problem with
the e1000 card and/or driver more apparent.

There is some bug in the e1000 card that causes it to wedge with
TSO+SG packets, the driver should have a sufficient workaround but
aparently not.

Some e1000 experts need to look into this.
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