[ubuntu-cloud] swapper: page allocation failure. order:5, mode:0x20 on Karmic EC2

[AJAY A]

Hello Folks

I have been getting swapper allocation failures on my EC2 Karmic 32 bit image.  Wonder this is something I should be worried?

$free -m 
             total       used       free     shared    buffers cached 
Mem:          1714       1652         61          0        485 683 
-/+ buffers/cache:        483       1230 
Swap:          895         53        842 
after $sync; echo 1 > /proc/sys/vm/drop_caches 
$free -m 
             total       used       free     shared    buffers cached 
Mem:          1714        522       1191          0          0  53 
-/+ buffers/cache:        469       1244 
Swap:          895         53        842 
syslog output > 
Aug 24 21:31:04 ubuntu kernel: [13657629.801785] __ratelimit: 81 
callbacks suppressed 
Aug 24 21:31:04 ubuntu kernel: [13657629.801790] swapper: page 
allocation failure. order:5, mode:0x20 
Aug 24 21:31:04 ubuntu kernel: [13657629.801794] Pid: 0, comm: swapper 
Tainted: G        W  2.6.31-302-ec2 #7-Ubuntu 
Aug 24 21:31:04 ubuntu kernel: [13657629.801810] Call Trace: 
Aug 24 21:31:04 ubuntu kernel: [13657629.801819]  [<c04c4f42>] ? printk 
+0x18/0x1e 
Aug 24 21:31:04 ubuntu kernel: [13657629.801825]  [<c0192e00>] 
__alloc_pages_slowpath+0x340/0x480 
Aug 24 21:31:04 ubuntu kernel: [13657629.801828]  [<c019304f>] 
__alloc_pages_nodemask+0x10f/0x120 
Aug 24 21:31:04 ubuntu kernel: [13657629.801832]  [<c01b911c>] T. 
653+0x3c/0xc0 
Aug 24 21:31:04 ubuntu kernel: [13657629.801834]  [<c01b925e>] T. 
651+0xbe/0x310 
Aug 24 21:31:04 ubuntu kernel: [13657629.801839]  [<c03deb84>] ? 
notify_remote_via_irq+0x64/0xe0 
Aug 24 21:31:04 ubuntu kernel: [13657629.801841]  [<c01b96ae>] 
cache_alloc_refill+0x1fe/0x240 
Aug 24 21:31:04 ubuntu kernel: [13657629.801843]  [<c01ba45e>] 
__kmalloc+0x10e/0x1a0 
Aug 24 21:31:04 ubuntu kernel: [13657629.801848]  [<c042f3c3>] 
pskb_expand_head+0x53/0x170 
Aug 24 21:31:04 ubuntu kernel: [13657629.801850]  [<c043107c>] 
__pskb_pull_tail+0x4c/0x2d0 
Aug 24 21:31:04 ubuntu kernel: [13657629.801855]  [<c0455d71>] ? 
nf_iterate+0x71/0x90 
Aug 24 21:31:04 ubuntu kernel: [13657629.801859]  [<c043abb3>] 
dev_queue_xmit+0x143/0x500 
Aug 24 21:31:04 ubuntu kernel: [13657629.801861]  [<c0455f06>] ? 
nf_hook_slow+0x96/0xd0 
Aug 24 21:31:04 ubuntu kernel: [13657629.801864]  [<c046153f>] 
ip_finish_output+0x12f/0x2c0 
Aug 24 21:31:04 ubuntu kernel: [13657629.801866]  [<c046176f>] 
ip_output+0x9f/0xb0 
Aug 24 21:31:04 ubuntu kernel: [13657629.801869]  [<c045eda0>] ? 
dst_output+0x0/0x10 
Aug 24 21:31:04 ubuntu kernel: [13657629.801871]  [<c045fbb8>] 
ip_local_out+0x18/0x20 
Aug 24 21:31:04 ubuntu kernel: [13657629.801873]  [<c046005c>] 
ip_queue_xmit+0x13c/0x370 
Aug 24 21:31:04 ubuntu kernel: [13657629.801877]  [<c0129311>] ? 
enqueue_task_fair+0x31/0x40 
Aug 24 21:31:04 ubuntu kernel: [13657629.801880]  [<c0472c7b>] ? 
tcp_established_options+0x2b/0xb0 
Aug 24 21:31:04 ubuntu kernel: [13657629.801882]  [<c0472d3d>] ? 
tcp_current_mss+0x3d/0x60 
Aug 24 21:31:04 ubuntu kernel: [13657629.801884]  [<c0473459>] 
tcp_transmit_skb+0x399/0x650 
Aug 24 21:31:04 ubuntu kernel: [13657629.801886]  [<c0470fcf>] ? 
tcp_clean_rtx_queue+0x5af/0x790 
Aug 24 21:31:04 ubuntu kernel: [13657629.801890]  [<c011a250>] ? 
__wake_up_common+0x40/0x70 
Aug 24 21:31:04 ubuntu kernel: [13657629.801892]  [<c04755c7>] 
tcp_write_xmit+0x167/0x460 
Aug 24 21:31:04 ubuntu kernel: [13657629.801895]  [<c0475ca1>] 
__tcp_push_pending_frames+0x31/0x90 
Aug 24 21:31:04 ubuntu kernel: [13657629.801897]  [<c046d6c6>] 
tcp_data_snd_check+0x26/0xe0 
Aug 24 21:31:04 ubuntu kernel: [13657629.801899]  [<c0471b97>] 
tcp_rcv_established+0x3c7/0x540 
Aug 24 21:31:04 ubuntu kernel: [13657629.801902]  [<c04798ad>] 
tcp_v4_do_rcv+0xbd/0x110 
Aug 24 21:31:04 ubuntu kernel: [13657629.801904]  [<c047a70e>] 
tcp_v4_rcv+0x5be/0x6f0 
Aug 24 21:31:04 ubuntu kernel: [13657629.801906]  [<c045c650>] ? 
ip_local_deliver_finish+0x0/0x1f0 
Aug 24 21:31:04 ubuntu kernel: [13657629.801909]  [<c045c6e7>] 
ip_local_deliver_finish+0x97/0x1f0 
Aug 24 21:31:04 ubuntu kernel: [13657629.801911]  [<c045c8c7>] 
ip_local_deliver+0x87/0x90 
Aug 24 21:31:04 ubuntu kernel: [13657629.801913]  [<c045c650>] ? 
ip_local_deliver_finish+0x0/0x1f0 
Aug 24 21:31:04 ubuntu kernel: [13657629.801916]  [<c045c2c3>] 
ip_rcv_finish+0xe3/0x360 
Aug 24 21:31:04 ubuntu kernel: [13657629.801919]  [<c04a9ff4>] ? 
packet_rcv_spkt+0xf4/0x130 
Aug 24 21:31:04 ubuntu kernel: [13657629.801921]  [<c045caca>] ip_rcv 
+0x1fa/0x2b0

 
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