On this page I've gathered some stuff about the Via C3 processer (ezra core) that I use on my server. For now I'll just include (md5: b6d7d77dfd70fb7c6c135f13fe9bc50c) a patch I found that makes the kernel emulate the missing CMOV instruction in the Via C3 processor. I've merged it for a 2.4.19 kernel - you should be able to merge it for a newer kernel without too much hassle NB. Emulating the CMOV instruction takes about 450clocks instead of just one - so it obviously can't be used for any ressource intensive things. p.s. I've been informed that the new nehemia core, support the CMOV instruction - finally true gcc compatible i686 :)