Red Hat Enterprise Linux 6.2 にアップグレードすると "page allocation failure. order:1, mode:0x20" メッセージがコンソールにいくつも表示される

Issue

• Update 2 にアップグレードすると、以下の警告メッセージがコンソールに表示されます。

Mar 18 14:39:17 hostname kernel: glusterfsd: page allocation failure. order:1, mode:0x20
Mar 18 14:39:17 hostname kernel: swapper: page allocation failure. order:1, mode:0x20
Mar 21 11:27:06 hostname kernel: swapper: page allocation failure. order:1, mode:0x20
Mar 21 18:25:45 hostname kernel: swapper: page allocation failure. order:1, mode:0x20
Mar 21 21:59:18 hostname kernel: swapper: page allocation failure. order:1, mode:0x20

• ページ割り当てに失敗するため、Swapper がメモリを割り当てることができません。

  kernel: swapper: page allocation failure. order:1, mode:0x20
  kernel:Pid:0, comm: swapper Not tainted 2.6.32-358.2.1.el6.x86_64 #1
  kernel:Call Trace:
  kernel:<IRQ>  [<ffffffff8112c207>] ?__alloc_pages_nodemask+0x757/0x8d0
  kernel:[<ffffffff81166ab2>] ? kmem_getpages+0x62/0x170
  kernel:[<ffffffff811676ca>] ? fallback_alloc+0x1ba/0x270
  kernel:[<ffffffff8116711f>] ? cache_grow+0x2cf/0x320
  kernel:[<ffffffff81167449>] ?____cache_alloc_node+0x99/0x160
  kernel:[<ffffffff811683cb>] ? kmem_cache_alloc+0x11b/0x190
  kernel:[<ffffffff81439d58>] ? sk_prot_alloc+0x48/0x1c0
  kernel:[<ffffffff8143ae32>] ? sk_clone+0x22/0x2e0
  kernel:[<ffffffff81489d66>] ? inet_csk_clone+0x16/0xd0
  kernel:[<ffffffff814a2c73>] ? tcp_create_openreq_child+0x23/0x450
  kernel:[<ffffffff814a046d>] ? tcp_v4_syn_recv_sock+0x4d/0x310
  kernel:[<ffffffff814a2a16>] ? tcp_check_req+0x226/0x460
  kernel:[<ffffffff8149ff0b>] ? tcp_v4_do_rcv+0x35b/0x430
  kernel:[<ffffffff81082034>] ? mod_timer+0x144/0x220
  kernel:[<ffffffff814a171e>] ? tcp_v4_rcv+0x4fe/0x8d0
  kernel:[<ffffffff814a171e>] ? tcp_v4_rcv+0x4fe/0x8d0
  kernel:[<ffffffff8147f50d>] ? ip_local_deliver_finish+0xdd/0x2d0
  kernel:[<ffffffff8147f798>] ? ip_local_deliver+0x98/0xa0
  kernel:[<ffffffff8147ec5d>] ? ip_rcv_finish+0x12d/0x440
  kernel:[<ffffffff8147f1e5>] ? ip_rcv+0x275/0x350
  kernel:[<ffffffff814483bb>] ?__netif_receive_skb+0x4ab/0x750
  kernel:[<ffffffff8144a798>] ? netif_receive_skb+0x58/0x60
  kernel:[<ffffffffa008b975>] ? vmxnet3_rq_rx_complete+0x365/0x890 [vmxnet3]
  kernel:[<ffffffff8128d2b0>] ? swiotlb_map_page+0x0/0x100
  kernel:[<ffffffffa008c0f3>] ? vmxnet3_poll_rx_only+0x43/0xc0 [vmxnet3]
  kernel:[<ffffffff8144cf63>] ? net_rx_action+0x103/0x2f0
  kernel:[<ffffffff81076fb1>] ?__do_softirq+0xc1/0x1e0
  kernel:[<ffffffff810e1720>] ? handle_IRQ_event+0x60/0x170
  kernel:[<ffffffff8100c1cc>] ? call_softirq+0x1c/0x30
  kernel:[<ffffffff8100de05>] ? do_softirq+0x65/0xa0
  kernel:[<ffffffff81076d95>] ? irq_exit+0x85/0x90
  kernel:[<ffffffff81516f15>] ? do_IRQ+0x75/0xf0
  kernel:[<ffffffff8100b9d3>] ? ret_from_intr+0x0/0x11
  kernel:<EOI>  [<ffffffff8103b90b>] ? native_safe_halt+0xb/0x10
  kernel:[<ffffffff8101495d>] ? default_idle+0x4d/0xb0
  kernel:[<ffffffff81009fc6>] ? cpu_idle+0xb6/0x110
  kernel:[<ffffffff81506d9c>] ? start_secondary+0x2ac/0x2ef