kern/144917: Flowtable crashes system

[K. Macy]

Please try with the latest 8-STABLE and tell me if recent changes fix it.

Thanks,
Kip

On Thu, Mar 25, 2010 at 8:32 AM, Ilya Zhuravlev <ilya at el-crane.net> wrote:
> On 21.03.2010 17:04, Evgenii Davidov wrote:
>>
>> Здравствуйте,
>>
>> On Sat, Mar 20, 2010 at 11:06:35PM +0000, Doychin Dokov пишет:
>>
>>>> Description:
>>>
>>> It seems like flowtable has been merged and enabled by default in 8.0....
>>> which is a really really bad idea.
>>> On a system which handles two full BGP tables it makes one of the CPU
>>> cores run at 100% right after most of the prefixes get installed in the
>>> routing table.
>>
>> i saw the same effect with ospf
>>
>
> 8.0-p2, 2 full-view with openbgpd
> "tuning":
> net.inet.tcp.blackhole=2
> net.inet.udp.blackhole=1
> net.inet.icmp.icmplim_output=0
> net.inet.icmp.drop_redirect=1
> net.inet.flowtable.nmbflows=32768
>
> 1 week uptime.Now I think only about increasing tx/rx descriptors to reduce
> interrupts (default values was not changed)
>
>
> netstat -w1 -Iigb0
>            input         (igb0)           output
>   packets  errs      bytes    packets  errs      bytes colls
>     49100     0   12290513      23693     0   27268884     0
>     48322     0   12688283      24332     0   28099404     0
>     50602     0   12759620      24437     0   27698341     0
>     47857     0   11354124      21410     0   23845155     0
>
> netstat -w1 -Iigb1
>            input         (igb1)           output
>   packets  errs      bytes    packets  errs      bytes colls
>     32428     0   35027019      24562     0    5624934     0
>     30621     0   33384339      23569     0    4456944     0
>     28419     0   31014269      21571     0    3638083     0
>     29409     0   32524760      22137     0    3503600     0
>     30965     0   33532742      23973     0    5089231     0
>
> netstat -w1 -Iem0
>            input          (em0)           output
>   packets  errs      bytes    packets  errs      bytes colls
>     17217     0    3929366      72741     0   46377762     0
>     17412     0    3745112      75522     0   49338883     0
>     18385     0    4014568      77444     0   50532101     0
>     17142     0    3875518      77125     0   47646681     0
>     16870     0    3528316      73188     0   47940959     0
>     17069     0    3682891      80268     0   52904747     0
>     17313     0    4101576      75586     0   51933330     0
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