kern/171873: [xen] xn network device floods warning in dmesg

Sat Sep 22 16:10:03 UTC 2012

>Number:         171873
>Category:       kern
>Synopsis:       [xen] xn network device floods warning in dmesg
>Confidential:   no
>Severity:       non-critical
>Priority:       low
>Responsible:    freebsd-bugs
>State:          open
>Quarter:        
>Keywords:       
>Date-Required:
>Class:          sw-bug
>Submitter-Id:   current-users
>Arrival-Date:   Sat Sep 22 16:10:03 UTC 2012
>Closed-Date:
>Last-Modified:
>Originator:     Mark van Dijk
>Release:        9.1-PRERELEASE
>Organization:
>Environment:
Xen 4.2 stable, most recent FreeBSD (using stable csupfile)
>Description:
The Xen networking device (xn0) is available when the XENHVM kernel has been compiled. The following message is flooded to dmesg:

xn_txeof: WARNING: response is -1!

I don't notice any degraded network performance.

The following options are enabled (and should be supported by Xen):
options=503<RXCSUM,TXCSUM,TSO4,LRO>

>How-To-Repeat:

>Fix:
Not sure if it is even a problem. Maybe the warning should just be removed.

>Release-Note:
>Audit-Trail:
>Unformatted: