For those interested, this is the Xen bug they were fixing with the reboots http://xenbits.xen.org/xsa/advisory-108.html
-Grant On Wed, Sep 24, 2014 at 8:41 PM, Reed Loden <r...@reedloden.com> wrote: > On Wed, 24 Sep 2014 21:39:39 -0400 > Peter Beckman <beck...@angryox.com> wrote: > > > Likely some sort of potentially serious bug or flaw in EC2 or Xen. AWS > > Security is really on the ball on such things and do everything they can > to > > make invisible fixes with no customer impact, but sometimes a reboot is > > required in order to apply the changes necessary to keep customer > instances > > safe from attacks and vulnerabilities. > > Rumor mill is that it's XSA-108, embargoed until 2014-10-01 12:00 > (http://xenbits.xen.org/xsa/). Just somebody's guess, though, afaik. > > ~reed >