[Bug 202199] Pure packet forwarding xen

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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=202199

            Bug ID: 202199
           Summary: Pure packet forwarding xen
           Product: Base System
           Version: 10.1-RELEASE
          Hardware: amd64
                OS: Any
            Status: New
          Severity: Affects Many People
          Priority: ---
         Component: kern
          Assignee: freebsd-bugs at FreeBSD.org
          Reporter: andrei at fazik.net.ua

Hello.
Sorry if duplicate, but I don't found any.
When running FreebBSD as guest on xen with 
options         XENHVM                  
device          xenpci
in kernel the packet forwarding becomes really slow, something near 5kb/s
I also tried to disable lro txcsum rxcsum tso with ifconfig but there was no
effect.
Something like this was in maillist but without happy end.
https://lists.freebsd.org/pipermail/freebsd-xen/2014-April/002106.html

Linux version on host system with this bug is 3.18.12-gentoo
xen-4.5
Please specify if you need more information.

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