On 09 Jan 2014, at 22:40, Amos Jeffries <squid3@xxxxxxxxxxxxx> wrote: > On 2014-01-10 10:25, spdonegan wrote: >> I am hitting an Illegal Instruction error immediately upon starting Squid on >> 64 bit CentOS. This does not occur on 32 bit CentOS (otherwise identical >> systems). Has anyone seen this? > > Squid-3.4+ running on a paravirtualised VM? use --disable-arch-native. I've (just) written a Wiki page on this topic. http://wiki.squid-cache.org/KnowledgeBase/IllegalInstructionError Kinkie