This is via Jenkins. This install received the following:

May 31 09:47:23 kernel: [ 3719.426587] swapper: page allocation failure. order:5, mode:0x4020
May 31 09:47:23 kernel: [ 3719.426591] Pid: 0, comm: swapper Not tainted 2.6.39-3-generic #9-Ubuntu
May 31 09:47:23 kernel: [ 3719.426593] Call Trace:
May 31 09:47:23 kernel: [ 3719.426600]  [<c15135b0>] ? printk+0x2d/0x2f
May 31 09:47:23 kernel: [ 3719.426605]  [<c10e68b3>] __alloc_pages_nodemask+0x5b3/0x790
May 31 09:47:23 kernel: [ 3719.426608]  [<c10e6b0c>] __get_free_pages+0x1c/0x30
May 31 09:47:23 kernel: [ 3719.426611]  [<c1117127>] kmalloc_order_trace+0x27/0xa0
May 31 09:47:23 kernel: [ 3719.426613]  [<c10e8c4d>] ? __put_compound_page+0x1d/0x30
May 31 09:47:23 kernel: [ 3719.426620]  [<dc0a313a>] ? vring_add_indirect+0x2a/0x170 [virtio_ring]
May 31 09:47:23 kernel: [ 3719.426622]  [<c1117991>] __kmalloc+0x1c1/0x1e0
May 31 09:47:23 kernel: [ 3719.426625]  [<dc0a3587>] ? virtqueue_add_buf_gfp+0x1a7/0x1f0 [virtio_ring]
May 31 09:47:23 kernel: [ 3719.426629]  [<c142bdc8>] pskb_expand_head+0x78/0x250
May 31 09:47:23 kernel: [ 3719.426631]  [<c142c036>] __pskb_pull_tail+0x46/0x330
May 31 09:47:23 kernel: [ 3719.426634]  [<c1437b1a>] dev_hard_start_xmit+0x1da/0x4c0
May 31 09:47:23 kernel: [ 3719.426639]  [<c144f161>] sch_direct_xmit+0xb1/0x180
May 31 09:47:23 kernel: [ 3719.426641]  [<c1437ef6>] dev_queue_xmit+0xf6/0x370
May 31 09:47:23 kernel: [ 3719.426645]  [<c1465add>] ip_finish_output+0x12d/0x300
May 31 09:47:23 kernel: [ 3719.426647]  [<c14665c7>] ip_output+0xc7/0xe0
May 31 09:47:23 kernel: [ 3719.426651]  [<c102acd8>] ? pvclock_clocksource_read+0xa8/0x120
May 31 09:47:23 kernel: [ 3719.426684]  [<c1465d80>] ip_local_out+0x20/0x30
May 31 09:47:23 kernel: [ 3719.426686]  [<c1465eaf>] ip_queue_xmit+0x11f/0x380
May 31 09:47:23 kernel: [ 3719.426688]  [<c1029de4>] ? kvm_clock_read+0x14/0x20
May 31 09:47:23 kernel: [ 3719.426691]  [<c1029df8>] ? kvm_clock_get_cycles+0x8/0x10
May 31 09:47:23 kernel: [ 3719.426694]  [<c147b9a1>] tcp_transmit_skb+0x2d1/0x4b0
May 31 09:47:23 kernel: [ 3719.426696]  [<c147c366>] tcp_write_xmit+0x146/0x370
May 31 09:47:23 kernel: [ 3719.426699]  [<c147c5fc>] __tcp_push_pending_frames+0x2c/0x90
May 31 09:47:23 kernel: [ 3719.426702]  [<c1479075>] tcp_rcv_established+0x235/0x710
May 31 09:47:23 kernel: [ 3719.426704]  [<c14805ce>] tcp_v4_do_rcv+0x8e/0x170
May 31 09:47:23 kernel: [ 3719.426706]  [<c1482217>] tcp_v4_rcv+0x4f7/0x760
May 31 09:47:23 kernel: [ 3719.426709]  [<c1461687>] ip_local_deliver_finish+0xa7/0x290
May 31 09:47:23 kernel: [ 3719.426712]  [<c1516ff5>] ? get_partial_node+0x52/0x79
May 31 09:47:23 kernel: [ 3719.426714]  [<c145f7a7>] ? ip_route_input_common+0x217/0x220
May 31 09:47:23 kernel: [ 3719.426717]  [<c14619ff>] ip_local_deliver+0x7f/0x90
May 31 09:47:23 kernel: [ 3719.426719]  [<c1461373>] ip_rcv_finish+0x113/0x380
May 31 09:47:23 kernel: [ 3719.426721]  [<c1461c53>] ip_rcv+0x243/0x310
May 31 09:47:23 kernel: [ 3719.426724]  [<c143699b>] __netif_receive_skb+0x40b/0x4c0
May 31 09:47:23 kernel: [ 3719.426726]  [<c1436d1f>] netif_receive_skb+0x6f/0x80
May 31 09:47:23 kernel: [ 3719.426730]  [<dc0e0465>] receive_buf+0x145/0x260 [virtio_net]
May 31 09:47:23 kernel: [ 3719.426738]  [<c15263bd>] ? _raw_spin_lock+0xd/0x10
May 31 09:47:23 kernel: [ 3719.426742]  [<dc0e0bdf>] virtnet_poll+0x7f/0xd0 [virtio_net]
May 31 09:47:23 kernel: [ 3719.426744]  [<c143747d>] net_rx_action+0x10d/0x220
May 31 09:47:23 kernel: [ 3719.426747]  [<c10b0383>] ? rcu_check_quiescent_state+0x23/0xa0
May 31 09:47:23 kernel: [ 3719.426751]  [<c10529c0>] ? local_bh_enable_ip+0x90/0x90
May 31 09:47:23 kernel: [ 3719.426753]  [<c10529c0>] ? local_bh_enable_ip+0x90/0x90
May 31 09:47:23 kernel: [ 3719.426756]  [<c1052a41>] __do_softirq+0x81/0x1a0
May 31 09:47:23 kernel: [ 3719.426758]  [<c10529c0>] ? local_bh_enable_ip+0x90/0x90
May 31 09:47:23 kernel: [ 3719.426760]  <IRQ>  [<c1052d86>] ? irq_exit+0x76/0x90
May 31 09:47:23 kernel: [ 3719.426764]  [<c152db7b>] ? do_IRQ+0x4b/0xc0
May 31 09:47:23 kernel: [ 3719.426767]  [<c152dab0>] ? common_interrupt+0x30/0x38
May 31 09:47:23 kernel: [ 3719.426769]  [<c1029eba>] ? native_safe_halt+0xa/0x10
May 31 09:47:23 kernel: [ 3719.426773]  [<c100953c>] ? default_idle.part.5+0x3c/0xf0
May 31 09:47:23 kernel: [ 3719.426775]  [<c100960f>] ? default_idle+0x1f/0x40
May 31 09:47:23 kernel: [ 3719.426777]  [<c100177a>] ? cpu_idle+0x8a/0xc0
May 31 09:47:23 kernel: [ 3719.426781]  [<c14f81d5>] ? rest_init+0x5d/0x68
May 31 09:47:23 kernel: [ 3719.426785]  [<c17b2767>] ? start_kernel+0x34c/0x352
May 31 09:47:23 kernel: [ 3719.426787]  [<c17b23ac>] ? pass_bootoption.constprop.1+0xe2/0xe2
May 31 09:47:23 kernel: [ 3719.426790]  [<c17b20b3>] ? i386_start_kernel+0xb3/0xb9
May 31 09:47:23 kernel: [ 3719.426791] Mem-Info:
May 31 09:47:23 kernel: [ 3719.426793] DMA per-cpu:
May 31 09:47:23 kernel: [ 3719.426794] CPU    0: hi:    0, btch:   1 usd:   0
May 31 09:47:23 kernel: [ 3719.426796] Normal per-cpu:
May 31 09:47:23 kernel: [ 3719.426797] CPU    0: hi:  186, btch:  31 usd: 119
May 31 09:47:23 kernel: [ 3719.426801] active_anon:1976 inactive_anon:5985 isolated_anon:0
May 31 09:47:23 kernel: [ 3719.426801]  active_file:34871 inactive_file:32798 isolated_file:0
May 31 09:47:23 kernel: [ 3719.426802]  unevictable:11393 dirty:196 writeback:0 unstable:0
May 31 09:47:23 kernel: [ 3719.426803]  free:12174 slab_reclaimable:6310 slab_unreclaimable:1055
May 31 09:47:23 kernel: [ 3719.426804]  mapped:5448 shmem:35 pagetables:209 bounce:0
May 31 09:47:23 kernel: [ 3719.426809] DMA free:4424kB min:92kB low:112kB high:136kB active_anon:0kB inactive_anon:12kB active_file:6152kB inactive_file:4332kB unevictable:0kB isolated(anon):0kB isolated(file):0kB present:15796kB mlocked:0kB dirty:4kB
May 31 09:47:23 kernel: [ 3719.426812] lowmem_reserve[]: 0 420 420 420
May 31 09:47:23 kernel: [ 3719.426818] Normal free:44272kB min:2576kB low:3220kB high:3864kB active_anon:7904kB inactive_anon:23928kB active_file:133332kB inactive_file:126860kB unevictable:45572kB isolated(anon):0kB isolated(file):0kB present:430772k
May 31 09:47:23 kernel: [ 3719.426822] lowmem_reserve[]: 0 0 0 0
May 31 09:47:23 kernel: [ 3719.426825] DMA: 201*4kB 103*8kB 61*16kB 29*32kB 12*64kB 1*128kB 0*256kB 0*512kB 0*1024kB 0*2048kB 0*4096kB = 4428kB
May 31 09:47:23 kernel: [ 3719.426831] Normal: 2762*4kB 1607*8kB 713*16kB 234*32kB 21*64kB 1*128kB 0*256kB 0*512kB 0*1024kB 0*2048kB 0*4096kB = 44272kB
May 31 09:47:23 kernel: [ 3719.426848] 79105 total pagecache pages
May 31 09:47:23 kernel: [ 3719.426849] 0 pages in swap cache
May 31 09:47:23 kernel: [ 3719.426851] Swap cache stats: add 0, delete 0, find 0/0
May 31 09:47:23 kernel: [ 3719.426852] Free swap  = 447484kB
May 31 09:47:23 kernel: [ 3719.426853] Total swap = 447484kB
May 31 09:47:23 kernel: [ 3719.427828] 112621 pages RAM
May 31 09:47:23 kernel: [ 3719.427830] 0 pages HighMem
May 31 09:47:23 kernel: [ 3719.427831] 3734 pages reserved
May 31 09:47:23 kernel: [ 3719.427832] 47602 pages shared
May 31 09:47:23 kernel: [ 3719.427833] 56945 pages non-shared
May 31 09:47:23 kernel: [ 3719.427869] swapper: page allocation failure. order:5, mode:0x4020
May 31 09:47:23 kernel: [ 3719.427873] Pid: 0, comm: swapper Not tainted 2.6.39-3-generic #9-Ubuntu
May 31 09:47:23 kernel: [ 3719.427875] Call Trace:
May 31 09:47:23 kernel: [ 3719.427880]  [<c15135b0>] ? printk+0x2d/0x2f
May 31 09:47:23 kernel: [ 3719.427885]  [<c10e68b3>] __alloc_pages_nodemask+0x5b3/0x790
May 31 09:47:23 kernel: [ 3719.427888]  [<c10e6b0c>] __get_free_pages+0x1c/0x30
May 31 09:47:23 kernel: [ 3719.427891]  [<c1117127>] kmalloc_order_trace+0x27/0xa0
May 31 09:47:23 kernel: [ 3719.427893]  [<c10e8c4d>] ? __put_compound_page+0x1d/0x30
May 31 09:47:23 kernel: [ 3719.427895]  [<c1117991>] ? __kmalloc+0x1c1/0x1e0
May 31 09:47:23 kernel: [ 3719.427898]  [<c1117991>] __kmalloc+0x1c1/0x1e0
May 31 09:47:23 kernel: [ 3719.427904]  [<dc0a3587>] ? virtqueue_add_buf_gfp+0x1a7/0x1f0 [virtio_ring]
May 31 09:47:23 kernel: [ 3719.427907]  [<c142bdc8>] pskb_expand_head+0x78/0x250
May 31 09:47:23 kernel: [ 3719.427909]  [<c142c036>] __pskb_pull_tail+0x46/0x330
May 31 09:47:23 kernel: [ 3719.427912]  [<c1437b1a>] dev_hard_start_xmit+0x1da/0x4c0
May 31 09:47:23 kernel: [ 3719.427916]  [<c144f161>] sch_direct_xmit+0xb1/0x180
May 31 09:47:23 kernel: [ 3719.427918]  [<c1437ef6>] dev_queue_xmit+0xf6/0x370
May 31 09:47:23 kernel: [ 3719.427921]  [<c1465add>] ip_finish_output+0x12d/0x300
May 31 09:47:23 kernel: [ 3719.427923]  [<c14665c7>] ip_output+0xc7/0xe0
May 31 09:47:23 kernel: [ 3719.427927]  [<c102acd8>] ? pvclock_clocksource_read+0xa8/0x120
May 31 09:47:23 kernel: [ 3719.427929]  [<c1465d80>] ip_local_out+0x20/0x30
May 31 09:47:23 kernel: [ 3719.427931]  [<c1465eaf>] ip_queue_xmit+0x11f/0x380
May 31 09:47:23 kernel: [ 3719.427934]  [<c1029de4>] ? kvm_clock_read+0x14/0x20
May 31 09:47:23 kernel: [ 3719.427936]  [<c1029df8>] ? kvm_clock_get_cycles+0x8/0x10
May 31 09:47:23 kernel: [ 3719.427939]  [<c147b9a1>] tcp_transmit_skb+0x2d1/0x4b0
May 31 09:47:23 kernel: [ 3719.427941]  [<c147c366>] tcp_write_xmit+0x146/0x370
May 31 09:47:23 kernel: [ 3719.427944]  [<c147c5fc>] __tcp_push_pending_frames+0x2c/0x90
May 31 09:47:23 kernel: [ 3719.427946]  [<c1479075>] tcp_rcv_established+0x235/0x710
May 31 09:47:23 kernel: [ 3719.427949]  [<c14805ce>] tcp_v4_do_rcv+0x8e/0x170
May 31 09:47:23 kernel: [ 3719.427951]  [<c1482217>] tcp_v4_rcv+0x4f7/0x760
May 31 09:47:23 kernel: [ 3719.427954]  [<c1461687>] ip_local_deliver_finish+0xa7/0x290
May 31 09:47:23 kernel: [ 3719.427956]  [<c1516ff5>] ? get_partial_node+0x52/0x79
May 31 09:47:23 kernel: [ 3719.427959]  [<c145f7a7>] ? ip_route_input_common+0x217/0x220
May 31 09:47:23 kernel: [ 3719.427961]  [<c14619ff>] ip_local_deliver+0x7f/0x90
May 31 09:47:23 kernel: [ 3719.427964]  [<c1461373>] ip_rcv_finish+0x113/0x380
May 31 09:47:23 kernel: [ 3719.427966]  [<c1461c53>] ip_rcv+0x243/0x310
May 31 09:47:23 kernel: [ 3719.427968]  [<c143699b>] __netif_receive_skb+0x40b/0x4c0
May 31 09:47:23 kernel: [ 3719.427971]  [<c1436d1f>] netif_receive_skb+0x6f/0x80
May 31 09:47:23 kernel: [ 3719.427974]  [<dc0e0465>] receive_buf+0x145/0x260 [virtio_net]
May 31 09:47:23 kernel: [ 3719.427977]  [<c15263bd>] ? _raw_spin_lock+0xd/0x10
May 31 09:47:23 kernel: [ 3719.427980]  [<dc0e0bdf>] virtnet_poll+0x7f/0xd0 [virtio_net]
May 31 09:47:23 kernel: [ 3719.427982]  [<c143747d>] net_rx_action+0x10d/0x220
May 31 09:47:23 kernel: [ 3719.427985]  [<c10b0383>] ? rcu_check_quiescent_state+0x23/0xa0
May 31 09:47:23 kernel: [ 3719.427989]  [<c10529c0>] ? local_bh_enable_ip+0x90/0x90
May 31 09:47:23 kernel: [ 3719.427991]  [<c10529c0>] ? local_bh_enable_ip+0x90/0x90
May 31 09:47:23 kernel: [ 3719.427994]  [<c1052a41>] __do_softirq+0x81/0x1a0
May 31 09:47:23 kernel: [ 3719.427996]  [<c10529c0>] ? local_bh_enable_ip+0x90/0x90
May 31 09:47:23 kernel: [ 3719.427998]  <IRQ>  [<c1052d86>] ? irq_exit+0x76/0x90
May 31 09:47:23 kernel: [ 3719.428037]  [<c152db7b>] ? do_IRQ+0x4b/0xc0
May 31 09:47:23 kernel: [ 3719.428039]  [<c152dab0>] ? common_interrupt+0x30/0x38
May 31 09:47:23 kernel: [ 3719.428042]  [<c1029eba>] ? native_safe_halt+0xa/0x10
May 31 09:47:23 kernel: [ 3719.428045]  [<c100953c>] ? default_idle.part.5+0x3c/0xf0
May 31 09:47:23 kernel: [ 3719.428048]  [<c100960f>] ? default_idle+0x1f/0x40
May 31 09:47:23 kernel: [ 3719.428050]  [<c100177a>] ? cpu_idle+0x8a/0xc0
May 31 09:47:23 kernel: [ 3719.428053]  [<c14f81d5>] ? rest_init+0x5d/0x68
May 31 09:47:23 kernel: [ 3719.428057]  [<c17b2767>] ? start_kernel+0x34c/0x352
May 31 09:47:23 kernel: [ 3719.428059]  [<c17b23ac>] ? pass_bootoption.constprop.1+0xe2/0xe2
May 31 09:47:23 kernel: [ 3719.428062]  [<c17b20b3>] ? i386_start_kernel+0xb3/0xb9
May 31 09:47:23 kernel: [ 3719.428063] Mem-Info:
May 31 09:47:23 kernel: [ 3719.428064] DMA per-cpu:
May 31 09:47:23 kernel: [ 3719.428066] CPU    0: hi:    0, btch:   1 usd:   0
May 31 09:47:23 kernel: [ 3719.428067] Normal per-cpu:
May 31 09:47:23 kernel: [ 3719.428094] CPU    0: hi:  186, btch:  31 usd: 134
May 31 09:47:23 kernel: [ 3719.428098] active_anon:1976 inactive_anon:5985 isolated_anon:0
May 31 09:47:23 kernel: [ 3719.428099]  active_file:34871 inactive_file:32798 isolated_file:0
May 31 09:47:23 kernel: [ 3719.428099]  unevictable:11393 dirty:196 writeback:0 unstable:0
May 31 09:47:23 kernel: [ 3719.428100]  free:12174 slab_reclaimable:6310 slab_unreclaimable:1055
May 31 09:47:23 kernel: [ 3719.428101]  mapped:5448 shmem:35 pagetables:209 bounce:0
May 31 09:47:23 kernel: [ 3719.428106] DMA free:4424kB min:92kB low:112kB high:136kB active_anon:0kB inactive_anon:12kB active_file:6152kB inactive_file:4332kB unevictable:0kB isolated(anon):0kB isolated(file):0kB present:15796kB mlocked:0kB dirty:4kB
May 31 09:47:23 kernel: [ 3719.428109] lowmem_reserve[]: 0 420 420 420
May 31 09:47:23 kernel: [ 3719.428115] Normal free:44272kB min:2576kB low:3220kB high:3864kB active_anon:7904kB inactive_anon:23928kB active_file:133332kB inactive_file:126860kB unevictable:45572kB isolated(anon):0kB isolated(file):0kB present:430772k
May 31 09:47:23 kernel: [ 3719.428119] lowmem_reserve[]: 0 0 0 0
May 31 09:47:23 kernel: [ 3719.428122] DMA: 201*4kB 103*8kB 61*16kB 29*32kB 12*64kB 1*128kB 0*256kB 0*512kB 0*1024kB 0*2048kB 0*4096kB = 4428kB
May 31 09:47:23 kernel: [ 3719.428128] Normal: 2762*4kB 1607*8kB 713*16kB 234*32kB 21*64kB 1*128kB 0*256kB 0*512kB 0*1024kB 0*2048kB 0*4096kB = 44272kB
May 31 09:47:23 kernel: [ 3719.428134] 79105 total pagecache pages
May 31 09:47:23 kernel: [ 3719.428135] 0 pages in swap cache
May 31 09:47:23 kernel: [ 3719.428137] Swap cache stats: add 0, delete 0, find 0/0
May 31 09:47:23 kernel: [ 3719.428138] Free swap  = 447484kB
May 31 09:47:23 kernel: [ 3719.428139] Total swap = 447484kB
May 31 09:47:23 kernel: [ 3719.429090] 112621 pages RAM
May 31 09:47:23 kernel: [ 3719.429092] 0 pages HighMem
May 31 09:47:23 kernel: [ 3719.429093] 3734 pages reserved
May 31 09:47:23 kernel: [ 3719.429094] 47601 pages shared
May 31 09:47:23 kernel: [ 3719.429095] 56931 pages non-shared
May 31 09:47:23 in-target: debconf (developer): <-- STOP