<html><head></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space; ">Hello Folks<div><br></div><div>I have been getting swapper allocation failures on my EC2 Karmic 32 bit image. &nbsp;Wonder this is something I should be worried?</div><div><br></div><div><p>$free -m
<br> &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;total &nbsp; &nbsp; &nbsp; used &nbsp; &nbsp; &nbsp; free &nbsp; &nbsp; shared &nbsp; &nbsp;buffers
cached
<br> Mem: &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;1714 &nbsp; &nbsp; &nbsp; 1652 &nbsp; &nbsp; &nbsp; &nbsp; 61 &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;0 &nbsp; &nbsp; &nbsp; &nbsp;485
683
<br> -/+ buffers/cache: &nbsp; &nbsp; &nbsp; &nbsp;483 &nbsp; &nbsp; &nbsp; 1230
<br> Swap: &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;895 &nbsp; &nbsp; &nbsp; &nbsp; 53 &nbsp; &nbsp; &nbsp; &nbsp;842
<br> </p><p>after $sync; echo 1 &gt; /proc/sys/vm/drop_caches
<br> </p><p>$free -m
<br> &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;total &nbsp; &nbsp; &nbsp; used &nbsp; &nbsp; &nbsp; free &nbsp; &nbsp; shared &nbsp; &nbsp;buffers
cached
<br> Mem: &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;1714 &nbsp; &nbsp; &nbsp; &nbsp;522 &nbsp; &nbsp; &nbsp; 1191 &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;0 &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;0 &nbsp;53
<br> -/+ buffers/cache: &nbsp; &nbsp; &nbsp; &nbsp;469 &nbsp; &nbsp; &nbsp; 1244
<br> Swap: &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;895 &nbsp; &nbsp; &nbsp; &nbsp; 53 &nbsp; &nbsp; &nbsp; &nbsp;842
<br> </p><p>syslog output &gt;
<br> </p><p>Aug 24 21:31:04 ubuntu kernel: [13657629.801785] __ratelimit: 81
<br> callbacks suppressed
<br> Aug 24 21:31:04 ubuntu kernel: [13657629.801790] swapper: page
<br> allocation failure. order:5, mode:0x20
<br> Aug 24 21:31:04 ubuntu kernel: [13657629.801794] Pid: 0, comm: swapper
<br> Tainted: G &nbsp; &nbsp; &nbsp; &nbsp;W &nbsp;2.6.31-302-ec2 #7-Ubuntu
<br> Aug 24 21:31:04 ubuntu kernel: [13657629.801810] Call Trace:
<br> Aug 24 21:31:04 ubuntu kernel: [13657629.801819] &nbsp;[&lt;c04c4f42&gt;] ? printk
<br> +0x18/0x1e
<br> Aug 24 21:31:04 ubuntu kernel: [13657629.801825] &nbsp;[&lt;c0192e00&gt;]
<br> __alloc_pages_slowpath+0x340/0x480
<br> Aug 24 21:31:04 ubuntu kernel: [13657629.801828] &nbsp;[&lt;c019304f&gt;]
<br> __alloc_pages_nodemask+0x10f/0x120
<br> Aug 24 21:31:04 ubuntu kernel: [13657629.801832] &nbsp;[&lt;c01b911c&gt;] T.
<br> 653+0x3c/0xc0
<br> Aug 24 21:31:04 ubuntu kernel: [13657629.801834] &nbsp;[&lt;c01b925e&gt;] T.
<br> 651+0xbe/0x310
<br> Aug 24 21:31:04 ubuntu kernel: [13657629.801839] &nbsp;[&lt;c03deb84&gt;] ?
<br> notify_remote_via_irq+0x64/0xe0
<br> Aug 24 21:31:04 ubuntu kernel: [13657629.801841] &nbsp;[&lt;c01b96ae&gt;]
<br> cache_alloc_refill+0x1fe/0x240
<br> Aug 24 21:31:04 ubuntu kernel: [13657629.801843] &nbsp;[&lt;c01ba45e&gt;]
<br> __kmalloc+0x10e/0x1a0
<br> Aug 24 21:31:04 ubuntu kernel: [13657629.801848] &nbsp;[&lt;c042f3c3&gt;]
<br> pskb_expand_head+0x53/0x170
<br> Aug 24 21:31:04 ubuntu kernel: [13657629.801850] &nbsp;[&lt;c043107c&gt;]
<br> __pskb_pull_tail+0x4c/0x2d0
<br> Aug 24 21:31:04 ubuntu kernel: [13657629.801855] &nbsp;[&lt;c0455d71&gt;] ?
<br> nf_iterate+0x71/0x90
<br> Aug 24 21:31:04 ubuntu kernel: [13657629.801859] &nbsp;[&lt;c043abb3&gt;]
<br> dev_queue_xmit+0x143/0x500
<br> Aug 24 21:31:04 ubuntu kernel: [13657629.801861] &nbsp;[&lt;c0455f06&gt;] ?
<br> nf_hook_slow+0x96/0xd0
<br> Aug 24 21:31:04 ubuntu kernel: [13657629.801864] &nbsp;[&lt;c046153f&gt;]
<br> ip_finish_output+0x12f/0x2c0
<br> Aug 24 21:31:04 ubuntu kernel: [13657629.801866] &nbsp;[&lt;c046176f&gt;]
<br> ip_output+0x9f/0xb0
<br> Aug 24 21:31:04 ubuntu kernel: [13657629.801869] &nbsp;[&lt;c045eda0&gt;] ?
<br> dst_output+0x0/0x10
<br> Aug 24 21:31:04 ubuntu kernel: [13657629.801871] &nbsp;[&lt;c045fbb8&gt;]
<br> ip_local_out+0x18/0x20
<br> Aug 24 21:31:04 ubuntu kernel: [13657629.801873] &nbsp;[&lt;c046005c&gt;]
<br> ip_queue_xmit+0x13c/0x370
<br> Aug 24 21:31:04 ubuntu kernel: [13657629.801877] &nbsp;[&lt;c0129311&gt;] ?
<br> enqueue_task_fair+0x31/0x40
<br> Aug 24 21:31:04 ubuntu kernel: [13657629.801880] &nbsp;[&lt;c0472c7b&gt;] ?
<br> tcp_established_options+0x2b/0xb0
<br> Aug 24 21:31:04 ubuntu kernel: [13657629.801882] &nbsp;[&lt;c0472d3d&gt;] ?
<br> tcp_current_mss+0x3d/0x60
<br> Aug 24 21:31:04 ubuntu kernel: [13657629.801884] &nbsp;[&lt;c0473459&gt;]
<br> tcp_transmit_skb+0x399/0x650
<br> Aug 24 21:31:04 ubuntu kernel: [13657629.801886] &nbsp;[&lt;c0470fcf&gt;] ?
<br> tcp_clean_rtx_queue+0x5af/0x790
<br> Aug 24 21:31:04 ubuntu kernel: [13657629.801890] &nbsp;[&lt;c011a250&gt;] ?
<br> __wake_up_common+0x40/0x70
<br> Aug 24 21:31:04 ubuntu kernel: [13657629.801892] &nbsp;[&lt;c04755c7&gt;]
<br> tcp_write_xmit+0x167/0x460
<br> Aug 24 21:31:04 ubuntu kernel: [13657629.801895] &nbsp;[&lt;c0475ca1&gt;]
<br> __tcp_push_pending_frames+0x31/0x90
<br> Aug 24 21:31:04 ubuntu kernel: [13657629.801897] &nbsp;[&lt;c046d6c6&gt;]
<br> tcp_data_snd_check+0x26/0xe0
<br> Aug 24 21:31:04 ubuntu kernel: [13657629.801899] &nbsp;[&lt;c0471b97&gt;]
<br> tcp_rcv_established+0x3c7/0x540
<br> Aug 24 21:31:04 ubuntu kernel: [13657629.801902] &nbsp;[&lt;c04798ad&gt;]
<br> tcp_v4_do_rcv+0xbd/0x110
<br> Aug 24 21:31:04 ubuntu kernel: [13657629.801904] &nbsp;[&lt;c047a70e&gt;]
<br> tcp_v4_rcv+0x5be/0x6f0
<br> Aug 24 21:31:04 ubuntu kernel: [13657629.801906] &nbsp;[&lt;c045c650&gt;] ?
<br> ip_local_deliver_finish+0x0/0x1f0
<br> Aug 24 21:31:04 ubuntu kernel: [13657629.801909] &nbsp;[&lt;c045c6e7&gt;]
<br> ip_local_deliver_finish+0x97/0x1f0
<br> Aug 24 21:31:04 ubuntu kernel: [13657629.801911] &nbsp;[&lt;c045c8c7&gt;]
<br> ip_local_deliver+0x87/0x90
<br> Aug 24 21:31:04 ubuntu kernel: [13657629.801913] &nbsp;[&lt;c045c650&gt;] ?
<br> ip_local_deliver_finish+0x0/0x1f0
<br> Aug 24 21:31:04 ubuntu kernel: [13657629.801916] &nbsp;[&lt;c045c2c3&gt;]
<br> ip_rcv_finish+0xe3/0x360
<br> Aug 24 21:31:04 ubuntu kernel: [13657629.801919] &nbsp;[&lt;c04a9ff4&gt;] ?
<br> packet_rcv_spkt+0xf4/0x130
<br> Aug 24 21:31:04 ubuntu kernel: [13657629.801921] &nbsp;[&lt;c045caca&gt;] ip_rcv
<br> +0x1fa/0x2b0</p><p>&nbsp;</p></div></body></html>