[Bug 192013] New: [xen] [pf] pf performance very bad in xen when tso enabled

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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=192013

            Bug ID: 192013
           Summary: [xen] [pf] pf performance very bad in xen when tso
                    enabled
           Product: Base System
           Version: 11.0-CURRENT
          Hardware: Any
                OS: Any
            Status: Needs Triage
          Severity: Affects Only Me
          Priority: ---
         Component: kern
          Assignee: freebsd-bugs at FreeBSD.org
          Reporter: swills at FreeBSD.org

Created attachment 144852
  --> https://bugs.freebsd.org/bugzilla/attachment.cgi?id=144852&action=edit
pf_xen_patch.txt

When using Xen and pf, performance of outbound traffic is very slow until tso
is disabled. The attached patch fixes it. This may or may not be related to bug
135178.

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