netdev - Re: Kernel Panic on OOM with 10 HTB rules

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Date:	Thu, 16 Sep 2010 11:35:29 +0200
From:	Patrick McHardy <kaber@...sh.net>
To:	Anand Raj Manickam <anandrm@...il.com>
CC:	Eric Dumazet <eric.dumazet@...il.com>, netdev@...r.kernel.org,
	netfilter-devel@...r.kernel.org, shemminger@...tta.com
Subject: Re: Kernel Panic on OOM with 10 HTB rules

On 08.09.2010 14:42, Eric Dumazet wrote:
> Le mercredi 08 septembre 2010 à 16:22 +0530, Anand Raj Manickam a
> écrit :
>> I m struck with
>> Kernel Panic - Out of Memory Issue  when  traffic  is more than 100k
>> pps  and have  around 10 tc rules.
>>
>> There is NO kernel panic with 1 tc rule .
>>
>> I using a 2.6.34.6 ( latest stable kernel) with SMP enabled
>>
>> The rules are simple -
>> 10 iptable rules :
>> iptables -t mangle -I FORWARD -s x.x.x.x  -j CLASSIFY --set-class 0xz:0xy
>>
>> 10 tc rules :
>> tc  class add dev imq0 parent 1:z classid 1:y htb rate 2kbit ceil 32768kbps
>>
>> I m using  Intel Xeon Quad core x5570, 12GB RAM , with 8 e1000e , irq
>> affined ( 1 pair per core)
>>
>> There is NO issue / CRASH with multiple iptable rules marking to the
>> same tc rule/HTB class , i can sucessfully pass more than 200k pps /
>> 800Mbps traffic .
>>
>> But when each iptable rule is marking to seprate tc rule/HTB class and
>> when the traffic exceeds 100K pps / 20000 connections per second , we
>> hit this Out of Memory - Kernel panic condition .
>> Any help is appreciated . Do let me know if any more further
>> information is need.
> 
> Hi Anand
> 
> Could you give :
> 
> 1) A complete stack trace / panic report
> 2) cat /proc/interrupts
> 3) ifconfig -a
> 4) cat /proc/sys/vm/min_free_kbytes
> 5) cat /proc/meminfo
> 
> for each eth*
>  ethtool -g eth*

Please try to reproduce without the imq patch.
--
To unsubscribe from this list: send the line "unsubscribe netdev" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html