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Date: Sun, 23 Mar 2008 10:21:26 +0100 From: Tobias Diedrich <ranma+kernel@...edrich.de> To: Herbert Xu <herbert@...dor.apana.org.au> Cc: linux-net@...r.kernel.org, linux-kernel@...r.kernel.org, Eric Dumazet <dada1@...mosbay.com> Subject: IPv6 slab leak (was: Re: dst cache overflow) Tobias Diedrich wrote: > Tobias Diedrich wrote: > > > just a reminder, the server is now running 2.6.24 and the leak is > > still there. I noticed there is a slab leak debug option and turned > > it on, results should be visible in a few days I guess. > > Current (20080318 19:42) biggest net-related numbers: > > skbuff_head_cache: 1614 __alloc_skb+0x29/0x108 > ip_dst_cache: 1579 dst_alloc+0x25/0x5f > skbuff_fclone_cache: 965 __alloc_skb+0x29/0x108 > size-512: 895 sock_wmalloc+0x2b/0x4d > TCPv6: 856 sk_clone+0x14/0x16a > size-2048: 733 tcp_sendmsg+0x174/0x9fc > size-512: 279 sock_alloc_send_skb+0x7c/0x193 > size-512: 238 tcp_send_ack+0x2a/0xec > size-512: 223 tcp_send_fin+0x60/0x12e > sock_inode_cache: 172 sock_alloc_inode+0x10/0x4e > size-1024: 147 sock_alloc_send_skb+0x7c/0x193 20080323 10:03 ip_dst_cache: 5556 dst_alloc+0x25/0x5f skbuff_fclone_cache: 4668 __alloc_skb+0x29/0x108 TCPv6: 4113 sk_clone+0x14/0x16a skbuff_head_cache: 3919 __alloc_skb+0x29/0x108 size-2048: 3662 tcp_sendmsg+0x174/0x9fc size-512: 1126 sock_alloc_send_skb+0x7c/0x193 size-512: 990 tcp_send_ack+0x2a/0xec size-512: 973 tcp_send_fin+0x60/0x12e size-1024: 349 sock_alloc_send_skb+0x7c/0x193 http://tdiedrich.de/~ranma/slab_allocators.20080318 http://tdiedrich.de/~ranma/slab_allocators.20080319 http://tdiedrich.de/~ranma/slab_allocators.20080321 http://tdiedrich.de/~ranma/slab_allocators.20080323 http://tdiedrich.de/~ranma/slab-month-oni-20080323.png http://tdiedrich.de/~ranma/route-month-oni-20080323.png oni:~# ip route ls 217.172.187.0/24 dev eth0 proto kernel scope link src 217.172.187.75 default via 217.172.187.1 dev eth0 oni:~# ip -6 route ls 2001:6f8:900:aee::/64 via :: dev sixxs metric 256 expires -152518sec mtu 1480 advmss 1420 hoplimit 4294967295 2001:6f8:1002::/64 via :: dev sixxs metric 256 expires -152518sec mtu 1480 advmss 1420 hoplimit 4294967295 fe80::/64 dev eth0 metric 256 expires -552013sec mtu 1500 advmss 1440 hoplimit 4294967295 fe80::/64 via :: dev sixxs metric 256 expires -152517sec mtu 1480 advmss 1420 hoplimit 4294967295 ff00::/8 dev eth0 metric 256 expires -552013sec mtu 1500 advmss 1440 hoplimit 4294967295 ff00::/8 dev sixxs metric 256 expires -152517sec mtu 1480 advmss 1420 hoplimit 4294967295 default via 2001:6f8:900:aee::1 dev sixxs metric 1 expires -152517sec mtu 1480 advmss 1420 hoplimit 4294967295 oni:~# uptime 10:09:07 up 6 days, 9:20, 1 user, load average: 0.14, 0.10, 0.08 oni:~# ip route ls cache | fgrep cache | wc -l 81 oni:~# cat /proc/net/stat/rt_cache entries in_hit in_slow_tot in_slow_mc in_no_route in_brd in_martian_dst in_martian_src out_hit out_slow_tot out_slow_mc gc_total gc_ignored gc_goal_miss gc_dst_overflow in_hlist_search out_hlist_search 000015b5 0049feed 0035b5a2 00000000 00000000 00000006 00000000 00000001 00104e45 00017421 00000000 0001d440 0001090e 000007be 00000000 00124053 00018998 oni:~# grep . /proc/sys/net/ipv4/route/* /proc/sys/net/ipv4/route/error_burst:500 /proc/sys/net/ipv4/route/error_cost:100 grep: /proc/sys/net/ipv4/route/flush: Permission denied /proc/sys/net/ipv4/route/gc_elasticity:8 /proc/sys/net/ipv4/route/gc_interval:60 /proc/sys/net/ipv4/route/gc_min_interval:0 /proc/sys/net/ipv4/route/gc_min_interval_ms:500 /proc/sys/net/ipv4/route/gc_thresh:2048 /proc/sys/net/ipv4/route/gc_timeout:300 /proc/sys/net/ipv4/route/max_delay:10 /proc/sys/net/ipv4/route/max_size:32768 /proc/sys/net/ipv4/route/min_adv_mss:256 /proc/sys/net/ipv4/route/min_delay:2 /proc/sys/net/ipv4/route/min_pmtu:552 /proc/sys/net/ipv4/route/mtu_expires:600 /proc/sys/net/ipv4/route/redirect_load:2 /proc/sys/net/ipv4/route/redirect_number:9 /proc/sys/net/ipv4/route/redirect_silence:2048 /proc/sys/net/ipv4/route/secret_interval:600 grep: /proc/sys/net/ipv6/route/flush: Permission denied /proc/sys/net/ipv6/route/gc_elasticity:0 /proc/sys/net/ipv6/route/gc_interval:30 /proc/sys/net/ipv6/route/gc_min_interval:0 /proc/sys/net/ipv6/route/gc_min_interval_ms:500 /proc/sys/net/ipv6/route/gc_thresh:1024 /proc/sys/net/ipv6/route/gc_timeout:60 /proc/sys/net/ipv6/route/max_size:4096 /proc/sys/net/ipv6/route/min_adv_mss:12 /proc/sys/net/ipv6/route/mtu_expires:600 oni:~# netstat -an | wc -l 200 oni:~# cat /proc/net/sockstat sockets: used 191 TCP: inuse 13 orphan 0 tw 14 alloc 27 mem 1 UDP: inuse 11 UDPLITE: inuse 0 RAW: inuse 0 FRAG: inuse 0 memory 0 HTH, -- Tobias PGP: http://9ac7e0bc.uguu.de このメールは十割再利用されたビットで作られています。 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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