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	Artis Caune <artis@fbsd.lv>
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Date: Thu, 25 Mar 2004 00:40:16 -0800 (PST)
From: Artis Caune <artis@fbsd.lv>
To: freebsd-gnats-submit@FreeBSD.org
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Subject: misc/64690: rl device with polling enabled generates ~600000
	outgoing "hidden" packets
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>Number:         64690
>Category:       misc
>Synopsis:       rl device with polling enabled generates ~600000 outgoing "hidden" packets
>Confidential:   no
>Severity:       non-critical
>Priority:       medium
>Responsible:    freebsd-bugs
>State:          open
>Quarter:        
>Keywords:       
>Date-Required:
>Class:          sw-bug
>Submitter-Id:   current-users
>Arrival-Date:   Thu Mar 25 00:50:19 PST 2004
>Closed-Date:
>Last-Modified:
>Originator:     Artis Caune
>Release:        5.2.1, 4.9
>Organization:
>Environment:
FreeBSD fbsd.lv 5.2.1-RELEASE-p3 FreeBSD 5.2.1-RELEASE-p3 #0: Thu Mar 18 13:01:46 EET 2004     root@fbsd.lv:/usr/obj/usr/src/sys/KERNEL  i386

>Description:
      with polling enabled:
~16% interupts
'netstat -w1' show about 600000 outgoing packets
tcpdump is quiet

      with polling disabled:
CPU is idle
'netstat -w1' show only some outgoing packets
tcpdump is also quiet ;-)

this is only for outgoing packets, incoming packets
works as expected.
same problem on 5.2.1 and 4.9
>How-To-Repeat:
      get rl nic, recompile kernel with polling enabled, and watch:
top -u
netstat -w1
netstat -in
tcpdump -n -i rl0
>Fix:
      disable polling:
sysctl kern.polling.enable=0
>Release-Note:
>Audit-Trail:
>Unformatted: