MC4_STATUS: Corrected error, other errors lost: no, CPU context corrupt: no, CECC Error

what happened:

Message from syslogd@DEUS at Thu Apr 28 13:59:26 2011 ...
DEUS kernel: [305700.000015] [Hardware Error]: MC4_STATUS: Corrected error, other errors lost: no, CPU context corrupt: no, CECC Error

Message from syslogd@DEUS at Thu Apr 28 13:59:26 2011 ...
DEUS kernel: [305700.000021] [Hardware Error]: Northbridge Error, node 0: , core: 0L3 ECC data cache error.

Message from syslogd@DEUS at Thu Apr 28 13:59:26 2011 ...
DEUS kernel: [305700.000025] [Hardware Error]: Transaction: RD, Type: GEN, Cache Level: L3/GEN

explained http://comments.gmane.org/gmane.linux.kernel/1097359

cosmic rays http://blog.ksplice.com/2010/06/attack-of-the-cosmic-rays/