From: Tomasz Chmielewski <mangoo@wpkg.org>
To: Eric Dumazet <eric.dumazet@gmail.com>
Cc: netdev@vger.kernel.org
Subject: Re: what's causing "ip_rt_bug"?
Date: Fri, 17 Jun 2011 23:37:46 +0200 [thread overview]
Message-ID: <4DFBC92A.2030901@wpkg.org> (raw)
In-Reply-To: <1308342993.3539.30.camel@edumazet-laptop>
On 17.06.2011 22:36, Eric Dumazet wrote:
> Le vendredi 17 juin 2011 à 22:00 +0200, Tomasz Chmielewski a écrit :
>> I have a system pushing around 800 Mbit/s, ~130 kpps.
>>
>> It uses 2.6.35.12 kernel.
>>
>>
>> Several times a minute, I can see entries like (a.b.c.d - IP of this system):
>>
>> Jun 18 02:39:19 KOR-SV22 kernel: [37187.665951] ip_rt_bug: 110.x.x.x -> a.b.c.d, ?
>> Jun 18 02:39:19 KOR-SV22 kernel: [37187.685419] ip_rt_bug: 110.x.x.x -> a.b.c.d, ?
>> Jun 18 02:40:31 KOR-SV22 kernel: [37259.199315] ip_rt_bug: 124.x.x.x -> a.b.c.d, ?
>> Jun 18 02:40:36 KOR-SV22 kernel: [37263.828000] ip_rt_bug: 124.x.x.x -> a.b.c.d, ?
>> Jun 18 02:44:16 KOR-SV22 kernel: [37484.120689] ip_rt_bug: 110.x.x.x -> a.b.c.d, ?
>> Jun 18 02:44:19 KOR-SV22 kernel: [37487.114357] ip_rt_bug: 110.x.x.x -> a.b.c.d, ?
>>
>
> Hi
>
> What your routing table looks like ? (ip ro)
It's just a proxy, no special routing set:
# ip ro
58.185.117.18 via 119.46.110.193 dev eth0
119.46.240.13 via 119.46.110.193 dev eth0
58.185.117.29 via 119.46.110.193 dev eth0
119.46.241.13 via 119.46.110.193 dev eth0
58.185.117.28 via 119.46.110.193 dev eth0
119.46.110.192/26 dev eth0 proto kernel scope link src 119.46.110.197
169.254.0.0/16 dev eth0 scope link
default via 119.46.110.195 dev eth0
The box is also crashing every few days; and I really had no clue why (just connected a serial console to catch any new oops/panic).
The last time it crashed, I have this entry in syslog:
Jun 17 16:16:17 TRUE-SC02 kernel: [172488.602629] ip_rt_bug: 124.121.155.197 -> 119.46.110.197, ?
Jun 17 16:17:00 TRUE-SC02 kernel: [172531.239041] BUG: unable to handle kernel NULL pointer dereference at (null)
Jun 17 16:17:00 TRUE-SC02 kernel: [172531.239409] IP: [<ffffffff81361cae>] dev_queue_xmit+0x1e3/0x441
Jun 17 16:17:00 TRUE-SC02 kernel: [172531.239760] PGD 43c30b067 PUD 439e63067 PMD 0
Jun 17 16:17:00 TRUE-SC02 kernel: [172531.240103] Oops: 0000 [#1] SMP
Jun 17 16:19:58 TRUE-SC02 syslogd 1.4.1: restart.
Right now, it uses the newest igb driver, and I started seeing "Out of socket memory" quite a bit (didn't have it with the original igb driver from 2.6.35.12).
So I doubled this value to be:
net.ipv4.tcp_max_orphans = 256000
and "Out of socket memory" stopped showing up.
Instead, "ip_rt_bug" shows up.
--
Tomasz Chmielewski
http://wpkg.org
next prev parent reply other threads:[~2011-06-17 21:37 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-06-17 20:00 what's causing "ip_rt_bug"? Tomasz Chmielewski
2011-06-17 20:36 ` Eric Dumazet
2011-06-17 21:37 ` Tomasz Chmielewski [this message]
2011-06-17 23:56 ` Julian Anastasov
2011-06-18 8:31 ` Tomasz Chmielewski
2011-06-18 17:53 ` Julian Anastasov
2011-06-28 3:55 ` David Miller
2011-06-28 8:13 ` Julian Anastasov
2011-06-28 8:41 ` David Miller
2011-06-28 9:05 ` Julian Anastasov
2011-06-28 8:30 ` Tomasz Chmielewski
2011-06-28 8:40 ` David Miller
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