From owner-freebsd-xen@FreeBSD.ORG  Wed Feb 13 18:30:02 2013
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From: Mark Felder <feld@feld.me>
Subject: Re: kern/175954: [xen] XENHVM xn network driver extreme packet loss
 during a slow download
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The following reply was made to PR kern/175954; it has been noted by GNATS.

From: Mark Felder <feld@feld.me>
To: bug-followup@FreeBSD.org, M8R-67o0de@mailinator.com
Cc:  
Subject: Re: kern/175954: [xen] XENHVM xn network driver extreme packet loss
 during a slow download
Date: Wed, 13 Feb 2013 12:22:26 -0600

 Is this server running a pf firewall? And does setting net.inet.tcp.tso=0  
 resolve it?