kernel 2.6.7 -> page allocation failure. order:1, mode:0x20 (netfilter?)

[Sebastien ESTIENNE]

Hello,
i have some "swapper: page allocation failure. order:1, mode:0x20"
followed by kernel message,

the hardware is a dell poweredge 1750
the kernel is a 2.6.7 vanilla

here for a dmesg
http://213.41.75.25/kernel/dmesg.txt

swapper: page allocation failure. order:1, mode:0x20
[<c013d770>] __alloc_pages+0x2da/0x34a
[<c013d805>] __get_free_pages+0x25/0x3f
[<c0140e28>] kmem_getpages+0x2b/0xdc
[<c0141bfc>] kfree_skbmem+0x24/0x2c
[<c0141c5d>] cache_grow+0xe5/0x2a4
[<c0141f8a>] cache_grow+0x146/0x2a4
[<c0295917>] cache_alloc_refill+0x1cf/0x29f
[<c014262a>] __kmalloc+0x85/0x8c
[<c02681f1>] tcp_transmit_skb+0x411/0x68a
[<c0296621>] alloc_skb+0x47/0xe0
[<c026875e>] tcp_write_xmit+0x16d/0x2d6
[<c01da1ac>] skb_copy+0x33/0xde
[<c026ca5b>] copy_from_user+0x42/0x6e
[<c028ac94>] skb_checksum_help+0x52/0x136
[<e094fb79>] ip_nat_fn+0x269/0x27a [iptable_nat]
[<e094fcb3>] ip_nat_local_fn+0x7b/0xaa [iptable_nat]
[<c028708e>] tcp_sendmsg+0x509/0x10f7
[<c0121872>] tasklet_action+0x65/0xae
[<c01065da>] apic_timer_interrupt+0x1a/0x20
[<c02ad977>] dst_output+0x0/0x29
[<c028708e>] inet_sendmsg+0x4d/0x59
[<c026498f>] dst_output+0x0/0x29
[<c0276a40>] sock_aio_write+0xbd/0xdd
[<c015902c>] do_sync_write+0x8b/0xb7
[<c01da1ac>] nf_iterate+0x71/0xa2
[<c028708e>] copy_from_user+0x42/0x6e
[<c0159140>] vfs_write+0xe8/0x119
[<c0159216>] sys_write+0x42/0x63
[<c0105beb>] syscall_call+0x7/0xb




the config file and other info of the kernel is here (.config, cpuinfo, 
modules etc)
http://213.41.75.25/kernel/

the problems seems related to netfilter, these messages appeared when i 
runned apache bench on localhost

here is the list of loaded modules:
af_packet 21512 0 - Live 0xe0990000
ipt_TOS 6144 12 - Live 0xe0973000
ipt_REJECT 9728 4 - Live 0xe0984000
ipt_pkttype 5504 4 - Live 0xe0944000
ipt_LOG 9984 9 - Live 0xe0949000
ipt_state 5760 9 - Live 0xe097a000
ipt_multiport 5888 0 - Live 0xe0903000
ipt_conntrack 6144 0 - Live 0xe0900000
iptable_mangle 6400 1 - Live 0xe0970000
ip_nat_irc 7664 0 - Live 0xe096d000
ip_nat_tftp 7024 0 - Live 0xe096a000
ip_nat_ftp 8432 0 - Live 0xe0966000
iptable_nat 25636 3 ip_nat_irc,ip_nat_tftp,ip_nat_ftp, Live 0xe094d000
ip_conntrack_irc 74544 1 ip_nat_irc, Live 0xe0930000
ip_conntrack_tftp 7088 0 - Live 0xe090f000
ip_conntrack_ftp 75184 1 ip_nat_ftp, Live 0xe091c000
ip_conntrack 33804 9 
ipt_state,ipt_conntrack,ip_nat_irc,ip_nat_tftp,ip_nat_ftp,iptable_nat,ip_conntrack_irc,ip_conntrack_tftp,ip_conntrack_ftp, 
Live 0xe0912000
iptable_filter 6400 1 - Live 0xe08cb000
ip_tables 20352 10 
ipt_TOS,ipt_REJECT,ipt_pkttype,ipt_LOG,ipt_state,ipt_multiport,ipt_conntrack,iptable_mangle,iptable_nat,iptable_filter, 
Live 0xe08f7000
rtc 15304 0 - Live 0xe089c000
tg3 86148 0 - Live 0xe08cf000
sg 33440 0 - Live 0xe08ac000
ide_cd 40864 0 - Live 0xe08a1000

thanx for your help
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