I got such warnings in dmesg - how can I fix this ?
My server got 32 GB RAM and it seems to be something wrong with httpd.
Timeout 10
KeepAlive On
MaxKeepAliveRequests 50
KeepAliveTimeout 10
<IfModule prefork.c>
StartServers 8
MinSpareServers 8
MaxSpareServers 16
ServerLimit 512
MaxClients 512
MaxRequestsPerChild 2000
MaxMemFree 0
SendBufferSize 131072
ReceiveBufferSize 131072
httpd: page allocation failure: order:1, mode:0x20
Pid: 24615, comm: httpd Not tainted 3.0.57-1.el5.elrepo #1
Call Trace:
<IRQ> [<ffffffff810e230f>] ? warn_alloc_failed+0x132/0x153
[<ffffffff810e0fd3>] ? get_page_from_freelist+0x19c/0x1ce
[<ffffffff810e10cd>] ? wake_all_kswapd+0x4d/0x66
[<ffffffff810e2655>] ? __alloc_pages_slowpath+0x325/0x345
[<ffffffff810e0fd3>] ? get_page_from_freelist+0x19c/0x1ce
[<ffffffff810e2745>] ? __alloc_pages_nodemask+0xd0/0x10b
[<ffffffff8111da51>] ? __alloc_pages+0x10/0x12
[<ffffffff8111da76>] ? alloc_pages_exact_node+0x23/0x28
[<ffffffff8111dab4>] ? kmem_getpages+0x39/0xdc
[<ffffffff8111dce8>] ? fallback_alloc+0x144/0x1d2
[<ffffffff8111de99>] ? ____cache_alloc_node+0x123/0x136
[<ffffffff8111f1c5>] ? kmem_cache_alloc+0x7f/0xd3
[<ffffffff8133b7ee>] ? sk_prot_alloc+0x3b/0xe2
[<ffffffff8133c5e6>] ? sk_clone+0x24/0x238
[<ffffffff81383f61>] ? inet_csk_clone+0x16/0x9c
[<ffffffff81399ea3>] ? tcp_create_openreq_child+0x2a/0x3a5
[<ffffffff81398e51>] ? tcp_v4_syn_recv_sock+0x41/0x1c8
[<ffffffff8139a4af>] ? tcp_check_req+0x210/0x2a3
[<ffffffff81383e21>] ? inet_csk_search_req+0x3c/0x9e
[<ffffffff81397b1e>] ? tcp_v4_hnd_req+0x61/0xe2
[<ffffffff81397cac>] ? tcp_v4_do_rcv+0x90/0x124
[<ffffffff81398c84>] ? tcp_v4_rcv+0x1f6/0x382
[<ffffffff8137989e>] ? ip_local_deliver_finish+0xdb/0x152
[<ffffffff813797c3>] ? ip_local_deliver+0x5d/0x5d
[<ffffffff8137906b>] ? NF_HOOK_THRESH+0x2f/0x36
[<ffffffff81371d72>] ? rcu_read_unlock+0xe/0x10
[<ffffffff8137908f>] ? NF_HOOK+0x1d/0x1f
[<ffffffff81379590>] ? ip_rcv+0x1dc/0x1dc
[<ffffffff813797ba>] ? ip_local_deliver+0x54/0x5d
[<ffffffff81378fda>] ? dst_input+0x1c/0x20
[<ffffffff81379590>] ? ip_rcv+0x1dc/0x1dc
[<ffffffff8137974e>] ? ip_rcv_finish+0x1be/0x1d6
[<ffffffff81379590>] ? ip_rcv+0x1dc/0x1dc
[<ffffffff8137906b>] ? NF_HOOK_THRESH+0x2f/0x36
[<ffffffff8137908f>] ? NF_HOOK+0x1d/0x1f
[<ffffffff81379562>] ? ip_rcv+0x1ae/0x1dc
[<ffffffff81348054>] ? __netif_receive_skb+0x2a9/0x2e3
[<ffffffff8134d75f>] ? process_backlog+0x62/0x130
[<ffffffff8134d53f>] ? net_rx_action+0x91/0x144
[<ffffffff810546f5>] ? __do_softirq+0xa7/0x145
[<ffffffff813fce1c>] ? call_softirq+0x1c/0x30
<EOI> [<ffffffff8100424c>] ? do_softirq+0x46/0x86
[<ffffffff81054602>] ? _local_bh_enable_ip+0x7f/0xa7
[<ffffffff81054638>] ? local_bh_enable_ip+0xe/0x10
[<ffffffff81081443>] ? __raw_spin_unlock_bh+0x24/0x26
[<ffffffff813f5e9e>] ? _raw_spin_unlock_bh+0xe/0x10
[<ffffffff8133a847>] ? spin_unlock_bh+0xe/0x10
[<ffffffff8133abb4>] ? release_sock+0x5b/0x60
[<ffffffff813a7935>] ? inet_stream_connect+0x14b/0x193
[<ffffffff81338464>] ? sys_connect+0x96/0xd6
[<ffffffff8113f468>] ? spin_unlock+0xe/0x10
[<ffffffff8113fbcb>] ? setfl+0x110/0x127
[<ffffffff81140033>] ? do_fcntl+0x15e/0x207
[<ffffffff81140157>] ? sys_fcntl+0x7b/0x8b
[<ffffffff813fbc02>] ? system_call_fastpath+0x16/0x1b