I have a Xen VM instance with Linode.com hosting, running CentOS 6.0 and a Linode-compiled 3.5.2 kernel. I'm after about 1 day of uptime on the (new) 3.5.2 kernel, I'm seeing kernel migration threads using high CPU:<br />
<br />
USER PID %CPU %MEM VSZ RSS TTY STAT START TIME COMMAND<br />
root 6 98.7 0.0 0 0 ? S Aug31 6694:22 [migration/0]<br />
root 7 0.0 0.0 0 0 ? S Aug31 0:00 [migration/1]<br />
root 10 47.6 0.0 0 0 ? S Aug31 3228:52 [migration/2]<br />
root 13 0.0 0.0 0 0 ? S Aug31 0:00 [migration/3]<br />
<br />
This issue appears to have been discussed in the OpenVZ forum:<br />
<a href="http://forum.openvz.org/index.php?t=msg&goto=43313&">http://forum.openvz.org/index.php?t=msg&goto=43313&</a> [<a href="http://forum.openvz.org/index.php?t=msg&goto=43313&" target="_blank">^</a>]<br />
and on LKML:<br />
<a href="https://lkml.org/lkml/2011/10/12/382">https://lkml.org/lkml/2011/10/12/382</a> [<a href="https://lkml.org/lkml/2011/10/12/382" target="_blank">^</a>]<br />
and has an open Gentoo bug that's confirmed:<br />
<a href="https://bugs.gentoo.org/show_bug.cgi?id=394487">https://bugs.gentoo.org/show_bug.cgi?id=394487</a> [<a href="https://bugs.gentoo.org/show_bug.cgi?id=394487" target="_blank">^</a>]
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