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Re: [PATCH] repairing rtcache killer

To: kuznet@xxxxxxxxxxxxx
Subject: Re: [PATCH] repairing rtcache killer
From: Robert Olsson <Robert.Olsson@xxxxxxxxxxx>
Date: Wed, 6 Aug 2003 20:50:28 +0200
Cc: Robert.Olsson@xxxxxxxxxxx (Robert Olsson), davem@xxxxxxxxxx, netdev@xxxxxxxxxxx
In-reply-to: <200308061806.WAA01763@xxxxxxxxxxxxx>
References: <16177.14760.612648.582063@xxxxxxxxxxxx> <200308061806.WAA01763@xxxxxxxxxxxxx>
Sender: netdev-bounce@xxxxxxxxxxx
kuznet@xxxxxxxxxxxxx writes:

 > It is the system with positive feedback. Reduction of chain length
 > results in increasing amount of misses and so on. Under normal load
 > it has the only stable state, zero chain length and will never leave it.
 > 
 > hits/misses is wrong feedback, unless you use it to increase chain length. 
 > :-)
 > 

 Well is was not the intention to find any optimum or equilibrium point
 the idea was just to get a different and more agressive setting pure DoS 
 attacks to start with. 

 Something like:

 if (in_hit < in_slow_tot) 
        ip_rt_gc_elasticity2 = 1;
 else 
         ip_rt_gc_elasticity2 = 2*ip_rt_gc_elasticity;

 would have been cleaner but maybe it's not worth it.


 Cheers.

                                                --ro

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