RE: HEADSUP: arp-v2 has been committed

The increase in "Use" count is not a leak. Before the arp-v2 commit, 
the counter increment occurs in the ARP entry for the gateway, but 
"rt_gwroute" is no longer necessary and has been removed. The outgoing 
interface is known from the default route entry, and because the gateway

is on-link, an ARP search is made in that interface. 
The side effect is the "Use" count is increased in the default route
entry. You will also notice a similar behavior when you access 
on-link hosts, i.e., the "Use" count for the interface route
192.169.1.0/24 will go up for every outgoing packet.

-- Qing


> -----Original Message-----
> From: owner-freebsd-current_at_freebsd.org [mailto:owner-freebsd-
> current_at_freebsd.org] On Behalf Of Giorgos Keramidas
> Sent: Monday, December 15, 2008 5:42 AM
> To: Qing Li
> Cc: freebsd-net_at_freebsd.org; freebsd-current_at_freebsd.org
> Subject: Re: HEADSUP: arp-v2 has been committed
> 
> On Mon, 15 Dec 2008 06:34:13 GMT, Qing Li <qingli_at_freebsd.org> wrote:
> > Hi All,
> >
> > The arp-v2 changes have been committed into HEAD.
> > Please report problems to me and Kip Macy.
> 
> Thanks!  I've just updated my installation here to the new kernel and
> userland and it seems to work fine so far.  At least, ARP and IPv4
> seems
> to work without any noticeable problem the last few hours :-)
> 
> I have one minor question though (still reading through the diff, so I
> am not sure if this is `normal').
> 
> The new netstat output includes a `Use' column that seems to be ever
> increasing:
> 
> : % netstat -rn -f inet
> : Routing tables
> :
> : Internet:
> : Destination        Gateway            Flags    Refs      Use  Netif
> Expire
> : default            192.168.1.1        UGS         0     5338    re0
> : 127.0.0.1          link#4             UH          0     1292    lo0
> : 192.168.1.0/24     link#2             U           0        2    re0
> :
> : % netstat -rn -f inet
> : Routing tables
> :
> : Internet:
> : Destination        Gateway            Flags    Refs      Use  Netif
> Expire
> : default            192.168.1.1        UGS         0     5365    re0
> : 127.0.0.1          link#4             UH          0     1337    lo0
> : 192.168.1.0/24     link#2             U           0        2    re0
> :
> : % netstat -rn -f inet
> : Routing tables
> :
> : Internet:
> : Destination        Gateway            Flags    Refs      Use  Netif
> Expire
> : default            192.168.1.1        UGS         0     5409    re0
> : 127.0.0.1          link#4             UH          0     1375    lo0
> : 192.168.1.0/24     link#2             U           0        2    re0
> 
> Is this expected, or does it look like a leak?
> 
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