Comment 0 for bug 1020285

As widely reported, the addition of the leap second on 2012-06-30 has
caused high CPU usage and futex lockups in a lot of applications
including JVMs, Mysql as well as desktop apps like Firefox and
Thunderbird.

https://lkml.org/lkml/2012/6/30/122
http://serverfault.com/questions/403732/anyone-else-experiencing-high-rates-of-linux-server-crashes-during-a-leap-second
https://blog.mozilla.org/it/2012/06/30/mysql-and-the-leap-second-high-cpu-and-the-fix/

We've seen this ourselves on the Canonical infrastructure on both
current Lucid and Precise kernels, i.e.

ii linux-image-2.6.32-41-server 2.6.32-41.90 Linux kernel image for version 2.6.32 on x86_64
ii linux-image-3.2.0-24-generic 3.2.0-24.39 Linux kernel image for version 3.2.0 on 64 bit x86 SMP

We can also confirm the 'date -s $(date)' workaround fixes the problem
without requiring a reboot.