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From: Genix <genix@list.ru>
To: shigorin@gmail.com,
	ALT Linux Sisyphus discussion list <sisyphus@lists.altlinux.org>
Subject: Re: [sisyphus] Re: Сплошной глюкодром а ALC3 на nForce2
Date: Fri, 20 Jan 2006 08:56:33 +0300
Message-ID: <43D07B91.1090309@list.ru> (raw)
In-Reply-To: <20060119192016.GE11208@osdn.org.ua>

Michael Shigorin wrote:

>>- часто даже localhost не пингуется и при попытке пинговать
>>выдаёт сообщение:
>>//=========================================
>>[root@dig root]# ping 10.0.0.1
>>connect: No buffer space available
>>[root@dig root]# ping localhost
>>connect: No buffer space available
>>//=========================================
> 
> 
> А вот этого не видел.

нашел в гугле, может поможет:
http://archive.linuxvirtualserver.org/html/lvs-users/2002-09/msg00238.html

A. Possible Causes for this Problem
-----------------------------------
o fragmentation
   You might have a big amount of fragmented packets coming in an your
   buffer space simply can't cope with it anymore before all packets are
   assembled.
o MTU(route output) < MTU(needed)
   In case this occurs, the kernel needs to fragment the packets and
   send them off then causing a lot of skb_alloc() and memory allocations
   in that direction.
o wrong default gateway configuration
   You might run your box with a wrong DGW pointing to an internal IP
   address configured on your box. The reason why it still works could be
   an intelligent router before your box.
o neigbour table overflow
   Your arp cache experienced some kind of overflow due to strange
   settings in /proc/sys/net/ipv4/neigh/<$INTERFACE>/* or due to circular
   routing entries.
o generally a weird /proc/sys/net/* configuration
   It could be anything there, let's hope it's not there.



B. How to Hunt Down those Problems
----------------------------------
I need the following outputs _when_ the problems occurs:
o ip -s -s link show
o ip addr show
o ip link show dev lo
o ip rule show
o ip route show table main
o cat /proc/net/softnet_stat
o cat /proc/net/rt_cache_stat
o cat /proc/net/raw (especially after a ping)
o cat /proc/net/netlink
o cat /proc/slabinfo


Could you also test if starting a tcpdump on either one of the 
interfaces triggers the problem somehow in that that the error messages 
show up more frequently?

C. Possible Band-Aid for the Problem
------------------------------------
o reboot (this is not really a solution)
o crontab that sets link state down/up (also not very nice)
o crontab that does 'ip route flush cache'


I hope you can do something with my information and that it will reveil 
a hint on where to search next. Sorry that we don't have a solution for 
this right now.

-- 
У каждого в башке свои тараканы...


  parent reply	other threads:[~2006-01-20  5:56 UTC|newest]

Thread overview: 29+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2006-01-19 17:55 [sisyphus] " Roman Savochenko
2006-01-19 18:11 ` Genix
2006-01-19 18:20   ` Roman Savochenko
2006-01-22 15:16     ` [sisyphus] " Anton Farygin
2006-01-23  8:15       ` Michael Shigorin
2006-01-24 11:56         ` Roman Savochenko
2006-01-25 11:07         ` Anton Farygin
2006-01-24 15:54       ` [sisyphus] Re: уРМПЫОПК ЗМАЛПДТПН Б ALC3 ОБ nForce2 Roman Savochenko
2006-01-24 16:13         ` Igor Zubkov
2006-01-24 16:37           ` Roman Savochenko
2006-01-24 17:19             ` [sisyphus] Стадии тестирования [wiki] Igor Zubkov
2006-01-24 16:45         ` [sisyphus] Re: уРМПЫОПК ЗМАЛПДТПН Б ALC3 ОБ nForce2 Sergey Bolshakov
2006-01-19 19:20 ` [sisyphus] Сплошной глюкодром а ALC3 на nForce2 Sergey Vlasov
2006-01-19 20:49   ` [sisyphus] " Michael Shigorin
2006-01-20  9:07   ` [sisyphus] " Epiphanov Sergei
2006-01-24 11:42   ` Roman Savochenko
2006-01-24 16:13     ` [sisyphus] lisa, "no buffer space" и никакого ping (was: Сплошной глюкодром а ALC3 на nForce2) Michael Shigorin
2006-01-24 17:14     ` [sisyphus] Сплошной глюкодром а ALC3 на nForce2 Sergey Vlasov
2006-01-19 19:20 ` [sisyphus] " Michael Shigorin
2006-01-20  5:50   ` Genix
2006-01-24 11:47     ` Roman Savochenko
2006-01-20  5:56   ` Genix [this message]
2006-01-24 11:45   ` Roman Savochenko
2006-01-19 19:24 ` Sergey Bolshakov
2006-01-20  7:13   ` Roman Savochenko
2006-01-20  7:06 ` [sisyphus] " Alexander Volkov
2006-01-20  7:09   ` Genix
2006-02-10 11:40   ` Roman Savochenko
2006-02-10 14:28     ` Andrei Bulava

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