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Message-ID: <47EC8701.1080604@cosmosbay.com> Date: Fri, 28 Mar 2008 06:49:53 +0100 From: Eric Dumazet <dada1@...mosbay.com> To: Denys Fedoryshchenko <denys@...p.net.lb> Cc: David Miller <davem@...emloft.net>, kaber@...sh.net, netdev@...r.kernel.org, netfilter-devel@...r.kernel.org Subject: Re: kernel 2.6.25-rc7 highly unstable on high load Denys Fedoryshchenko a écrit : > 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 > 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 > risk on it, so i wish i can simulate in my home mini-lab. Still i am not able > 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 > > 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| > 263| 190| 0| 709| 708| 0| 0| 3545| 313| > 92913| 8829| 1211| 0| 1| 0| 0| 0| > 343| 163| 0| 1375| 1373| 0| 0| 12545| 724| > 115323| 8232| 906| 0| 0| 0| 0| 0| > 299| 128| 0| 1035| 1033| 0| 0| 18069| 813| > 128985| 8650| 839| 0| 0| 0| 0| 0| > 289| 115| 0| 954| 952| 0| 0| 22515| 845| > 116682| 8911| 861| 0| 0| 0| 0| 0| > 288| 117| 0| 978| 976| 0| 0| 23433| 775| > 99969| 9164| 889| 0| 0| 0| 0| 0| > 280| 113| 0| 1002| 1000| 0| 0| 26741| 839| > 124602| 9395| 1012| 0| 0| 0| 0| 0| > 271| 122| 0| 1134| 1132| 0| 0| 27381| 787| > 110051| 10036| 824| 0| 0| 0| 0| 0| > 279| 120| 0| 944| 942| 0| 0| 28558| 783| > 126835| 10631| 772| 0| 0| 0| 0| 0| > 274| 117| 0| 888| 886| 0| 0| 29451| 780| > 111881| 10357| 762| 0| 0| 0| 0| 0| > 275| 117| 0| 879| 877| 0| 0| 28235| 751| > 127018| 10178| 796| 0| 0| 0| 0| 0| > 283| 117| 0| 913| 911| 0| 0| 29480| 807| > 112242| 9839| 814| 0| 0| 0| 0| 0| > 293| 115| 0| 929| 927| 0| 0| 28095| 796| > 41267| 9493| 1217| 0| 1| 0| 0| 0| > 269| 138| 0| 811| 810| 0| 0| 18545| 548| > 76380| 9722| 1060| 0| 1| 0| 0| 0| > 250| 135| 0| 1195| 1193| 0| 0| 14786| 414| > 99922| 9811| 779| 0| 0| 0| 0| 0| > 281| 124| 0| 902| 900| 0| 0| 21853| 589| > > 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| > 4611| 2090| 0| 15820| 15789| 0| 0| 369513| 11562| > 105226| 10215| 872| 0| 0| 0| 0| 0| > 279| 116| 0| 988| 986| 0| 0| 30343| 799| > 126236| 10462| 924| 0| 0| 0| 0| 0| > 260| 120| 0| 1044| 1042| 0| 0| 31699| 782| > 114492| 9782| 884| 0| 0| 0| 0| 0| > 253| 120| 0| 1005| 1003| 0| 0| 29695| 722| > > 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| > 5976| 2696| 0| 20647| 20606| 0| 0| 521714| 15415| > > > !!!!! > I am not wrong, ip route flush cache doesn't work at 2.6.25-rc7. I will make > 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 -- 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
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