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

On Fri, 28 Mar 2008 06:49:53 +0100, Eric Dumazet wrote

Denys Fedoryshchenko a :

quoted

Just to make sure 2.6.24.3 is stable and it is regression i am supplying 
output from it.
Do you want me to submit summary to bugzilla and regression list as well?

And in short, IMHO 2.6.25 have major issues on routing that have to be 

fixed 

quoted

before release. TRIE is crashing, and even with HASH there is leak. I am 
trying my best to bisect it, but it is major router and i cannot take 

much 

quoted

risk on it, so i wish i can simulate in my home mini-lab. Still i am not 

able 

quoted

to get even proper switch (Lebanon difficult country for IT).

Kup ~ # uname -a
Linux Kup 2.6.24.3-build-0023 #3 SMP Sat Mar 8 13:01:35 EET 2008 i686 

unknown

quoted

up ~ # rtstat -i60 -c6000
rt_cache|rt_cache|rt_cache|rt_cache|rt_cache|rt_cache|rt_cache|rt_cache|
rt_cache|rt_cache|rt_cache|rt_cache|rt_cache|rt_cache|rt_cache|rt_cache|
rt_cache|
 entries|  in_hit|in_slow_|in_slow_|in_no_ro|  in_brd|in_marti|in_marti| 
out_hit|out_slow|out_slow|gc_total|gc_ignor|gc_goal_|gc_dst_o|in_hlist|
out_hlis|
        |        |     tot|      mc|     ute|        |  an_dst|  
an_src|        |    _tot|     _mc|        |      ed|    miss| verflow| 
_search|t_search|
   54750|    4430|    1128|       0|      12|       0|       0|       

0|     

quoted

263|     190|       0|     709|     708|       0|       0|    3545|     

313|

quoted

   92913|    8829|    1211|       0|       1|       0|       0|       

0|     

quoted

343|     163|       0|    1375|    1373|       0|       0|   12545|     

724|

quoted

  115323|    8232|     906|       0|       0|       0|       0|       

0|     

quoted

299|     128|       0|    1035|    1033|       0|       0|   18069|     

813|

quoted

  128985|    8650|     839|       0|       0|       0|       0|       

0|     

quoted

289|     115|       0|     954|     952|       0|       0|   22515|     

845|

quoted

  116682|    8911|     861|       0|       0|       0|       0|       

0|     

quoted

288|     117|       0|     978|     976|       0|       0|   23433|     

775|

quoted

   99969|    9164|     889|       0|       0|       0|       0|       

0|     

quoted

280|     113|       0|    1002|    1000|       0|       0|   26741|     

839|

quoted

  124602|    9395|    1012|       0|       0|       0|       0|       

0|     

quoted

271|     122|       0|    1134|    1132|       0|       0|   27381|     

787|

quoted

  110051|   10036|     824|       0|       0|       0|       0|       

0|     

quoted

279|     120|       0|     944|     942|       0|       0|   28558|     

783|

quoted

  126835|   10631|     772|       0|       0|       0|       0|       

0|     

quoted

274|     117|       0|     888|     886|       0|       0|   29451|     

780|

quoted

  111881|   10357|     762|       0|       0|       0|       0|       

0|     

quoted

275|     117|       0|     879|     877|       0|       0|   28235|     

751|

quoted

  127018|   10178|     796|       0|       0|       0|       0|       

0|     

quoted

283|     117|       0|     913|     911|       0|       0|   29480|     

807|

quoted

  112242|    9839|     814|       0|       0|       0|       0|       

0|     

quoted

293|     115|       0|     929|     927|       0|       0|   28095|     

796|

quoted

   41267|    9493|    1217|       0|       1|       0|       0|       

0|     

quoted

269|     138|       0|     811|     810|       0|       0|   18545|     

548|

quoted

   76380|    9722|    1060|       0|       1|       0|       0|       

0|     

quoted

250|     135|       0|    1195|    1193|       0|       0|   14786|     

414|

quoted

   99922|    9811|     779|       0|       0|       0|       0|       

0|     

quoted

281|     124|       0|     902|     900|       0|       0|   21853|     

589|

quoted

Kup ~ # rtstat -i60 -c6000
rt_cache|rt_cache|rt_cache|rt_cache|rt_cache|rt_cache|rt_cache|rt_cache|
rt_cache|rt_cache|rt_cache|rt_cache|rt_cache|rt_cache|rt_cache|rt_cache|
rt_cache|
 entries|  in_hit|in_slow_|in_slow_|in_no_ro|  in_brd|in_marti|in_marti| 
out_hit|out_slow|out_slow|gc_total|gc_ignor|gc_goal_|gc_dst_o|in_hlist|
out_hlis|
        |        |     tot|      mc|     ute|        |  an_dst|  
an_src|        |    _tot|     _mc|        |      ed|    miss| verflow| 
_search|t_search|

  122053|  150955|   14888|       0|      25|       1|       0|       

0|    

quoted

4611|    2090|       0|   15820|   15789|       0|       0|  369513|   

11562|

quoted

  105226|   10215|     872|       0|       0|       0|       0|       

0|     

quoted

279|     116|       0|     988|     986|       0|       0|   30343|     

799|

quoted

  126236|   10462|     924|       0|       0|       0|       0|       

0|     

quoted

260|     120|       0|    1044|    1042|       0|       0|   31699|     

782|

quoted

  114492|    9782|     884|       0|       0|       0|       0|       

0|     

quoted

253|     120|       0|    1005|    1003|       0|       0|   29695|     

722|

quoted

After ip route flush cache
Kup ~ # rtstat -i60 -c6000
rt_cache|rt_cache|rt_cache|rt_cache|rt_cache|rt_cache|rt_cache|rt_cache|
rt_cache|rt_cache|rt_cache|rt_cache|rt_cache|rt_cache|rt_cache|rt_cache|
rt_cache|
 entries|  in_hit|in_slow_|in_slow_|in_no_ro|  in_brd|in_marti|in_marti| 
out_hit|out_slow|out_slow|gc_total|gc_ignor|gc_goal_|gc_dst_o|in_hlist|
out_hlis|
        |        |     tot|      mc|     ute|        |  an_dst|  
an_src|        |    _tot|     _mc|        |      ed|    miss| verflow| 
_search|t_search|
    9088|  202136|   19262|       0|      29|       1|       0|       

0|    

quoted

5976|    2696|       0|   20647|   20606|       0|       0|  521714|   

15415|

quoted

!!!!!
I am not wrong, ip route flush cache doesn't work at 2.6.25-rc7. I will 

make 

quoted

sure about that now.
  

Maybe you are a litle bit too fast for "ip route flush cache" :)

It used to work like that : schedule a timer to start a flush in 
about 2 seconds. A flush meaning : scan the whole table and delete 
all entries.

On machines with 4 millions dst entries, this was using too much 
time and eventually crashing.

On recent kernels, each rtable entry has a special field named 
rt_genid, so that "ip route flush cache" doesnt have to scan the 
whole table, but only change the global genid. rtables entries will 
be deleted later, when their rt_genid is found to be different than 
the global genid.

Please try the patch that was suggested yesterday, as it is probably 
the cure your router needs.

http://git2.kernel.org/?p=linux/kernel/git/davem/net-

2.6.git;a=commitdiff;h=7c0ecc4c4f8fd90988aab8a95297b9c0038b6160

Thank you

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--
Denys Fedoryshchenko
Technical Manager
Virtual ISP S.A.L.