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Re: [Qemu-devel] [PATCH] e1000: Pad short frames to minimum size (60 byt

From: Edgar E. Iglesias
Subject: Re: [Qemu-devel] [PATCH] e1000: Pad short frames to minimum size (60 bytes)
Date: Mon, 20 Sep 2010 11:03:37 +0200
User-agent: Mutt/1.5.20 (2009-06-14)

On Mon, Sep 20, 2010 at 10:50:40AM +0200, Kevin Wolf wrote:
> Am 19.09.2010 08:36, schrieb Stefan Hajnoczi:
> > On Sat, Sep 18, 2010 at 10:27 PM, Edgar E. Iglesias
> > <address@hidden> wrote:
> >> This doesn't look right. AFAIK, MAC's dont pad on receive.
> > 
> > I agree.  NICs that do padding will do it on transmit, not receive.
> > Anything coming in on the wire should already have the minimum length.
> > 
> > In QEMU that isn't true today and that's why rtl8139, pcnet, and
> > ne2000 already do this same padding.  This patch is the smallest
> > change to cover e1000.
> What's the reason that it isn't true in QEMU today? Shouldn't we fix
> these problems rather than making device emulations incorrect to
> compensate for it?

Yes we should, I agree.


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