Date: Tue, 24 Jun 2008 11:26:41 -0400 From: Paul <paul@gtcomm.net> To: "Bruce M. Simpson" <bms@FreeBSD.org> Cc: FreeBSD Net <freebsd-net@freebsd.org> Subject: Re: Route messages Message-ID: <48611231.6000603@gtcomm.net> In-Reply-To: <4854EBF1.7020708@FreeBSD.org> References: <4852E23E.2040505@gtcomm.net> <4854EBF1.7020708@FreeBSD.org>
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2574 output packets discarded due to no route
2904 output datagrams fragmented
5808 fragments created
not incrementing..
route monitor....:
got message of size 160 on Tue Jun 24 10:59:04 2008
RTM_MISS: Lookup failed on this address: len 160, pid: 0, seq 0, errno
0, flags:<DONE>
locks: inits:
sockaddrs: <DST>
default
got message of size 160 on Tue Jun 24 10:59:04 2008
RTM_MISS: Lookup failed on this address: len 160, pid: 0, seq 0, errno
0, flags:<DONE>
locks: inits:
sockaddrs: <DST>
default
got message of size 160 on Tue Jun 24 10:59:04 2008
RTM_MISS: Lookup failed on this address: len 160, pid: 0, seq 0, errno
0, flags:<DONE>
locks: inits:
sockaddrs: <DST>
default
got message of size 160 on Tue Jun 24 10:59:04 2008
RTM_MISS: Lookup failed on this address: len 160, pid: 0, seq 0, errno
0, flags:<DONE>
locks: inits:
sockaddrs: <DST>
default
got message of size 160 on Tue Jun 24 10:59:04 2008
RTM_MISS: Lookup failed on this address: len 160, pid: 0, seq 0, errno
0, flags:<DONE>
locks: inits:
sockaddrs: <DST>
default
got message of size 160 on Tue Jun 24 10:59:04 2008
RTM_MISS: Lookup failed on this address: len 160, pid: 0, seq 0, errno
0, flags:<DONE>
locks: inits:
sockaddrs: <DST>
default
got message of size 160 on Tue Jun 24 10:59:04 2008
RTM_MISS: Lookup failed on this address: len 160, pid: 0, seq 0, errno
0, flags:<DONE>
locks: inits:
sockaddrs: <DST>
default
got message of size 160 on Tue Jun 24 10:59:04 2008
RTM_MISS: Lookup failed on this address: len 160, pid: 0, seq 0, errno
0, flags:<DONE>
locks: inits:
sockaddrs: <DST>
default
got message of size 160 on Tue Jun 24 10:59:04 2008
RTM_MISS: Lookup failed on this address: len 160, pid: 0, seq 0, errno
0, flags:<DONE>
locks: inits:
sockaddrs: <DST>
default
I don't get it.. :/ I do have a default route.. grr. :P Must be
something to do with GRE but I can't recreate it on -RELEASE, only
-STABLE and I don't see any differences in -STABLE that might cause it
except maybe the EM driver? But I don't see how that would do it..
The only difference in route.c from RELEASE to STABLE is :
- * $FreeBSD: src/sys/net/route.c,v 1.120.2.1.2.1 2008/01/09 15:23:36
mux Exp $
+ * $FreeBSD: src/sys/net/route.c,v 1.120.2.3 2008/03/05 20:33:46 jhb Exp $
*/
#include "opt_inet.h"
@@ -396,7 +396,7 @@
error = EHOSTUNREACH;
done:
if (rt)
- rtfree(rt);
+ RTFREE_LOCKED(rt);
out:
if (error)
rtstat.rts_badredirect++;
Hrm.. what's a good way to disable the RT_MISS messages .. I guess ill
have to add a check to see if msgtype=RTM_MISS and bypass the
reporting... Is there a way to make it report what the source ip address
it is trying to find a route for?
Thanks
Paul
Bruce M. Simpson wrote:
> Paul wrote:
>> Get these with GRE tunnel on
>> FreeBSD 7.0-STABLE FreeBSD 7.0-STABLE #5: Sun May 11 19:00:57 EDT
>> 2008 :/usr/obj/usr/src/sys/ROUTER amd64
>> But do not get them with 7.0-RELEASE
>>
>> Any ideas what changed? :) Wish there was some sort of changelog..
>> # of messages per second seems consistent with packets per second on
>> GRE interface..
>> No impact in routing, but definitely impact in cpu usage for all
>> processes monitoring the route messages.
>
> RTM_MISS is actually fairly common when you don't have a default route.
>
> Messages which get enqueued don't necessarily get delivered -- and
> very few processes actually listen to the routing socket actively like
> this, so I wouldn't worry about it.
>
> If it's a real concern for you then you could try hacking in a sysctl
> to tell the radix trie code not to issue RTM_MISS messages on the
> routing socket.
>
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