It seems or patch change something (but it is just showing debug, strange), 
or there is something fixed between 2.6.25-rc7-git1 and 2.6.25-rc7-git3. LC-
trie working fine, HASH also i cannot see any leaks.

I  will have to wait 5-6 hours to make sure. After this time pass, if i will 
not see bug again, i will try to run kernel just with default debug like 
before.

If it is required, i can test performance and cpu load with/without routing 
cache on real workload. Sure it is better to have syntetic tests before that.


On Fri, 28 Mar 2008 13:23:59 -0700, Stephen Hemminger wrote

On Fri, 28 Mar 2008 16:57:55 +0100
Eric Dumazet [off-list ref] wrote:

quoted

Eric Dumazet a [UTF-8?] :

quoted

Denys Fedoryshchenko a [UTF-8?] :

quoted

Already patched and tested, it doesn't change anything.

  

We still leak dsts somewhere.

You could try git bisect, or try to patch net/core/dst.c so that 
dst_gc_task() (line 83) displays
route informations for say 10 first entries found in the dst_busy_list
(refcnt, interface, source IP, dest IP, things like that) that could 
ring a bell given your netfilter rules or network conf.

I cooked a patch (untested) to implement this idea :

It should display lines similar to /proc/net/rt_cache (reusing the same 
helper function)

I wonder how much the route cache really helps when it grows so 
large? Robert Olsson had suggested that turning it off when routing 
would help. Perhaps the route cache is only really useful for local 
destinations? If the cost of maintaining the route cache exceeds the 
cost of just using the existing route table, there is no value to 
having a route cache.
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Denys Fedoryshchenko
Technical Manager
Virtual ISP S.A.L.