Hello, The i386 port, both 10-STABLE and 11-CURRENT, will not boot on systems without SSE support. This is caused by r273995, as using `svn merge -c -273995` (and hacking-and-sloshing through the few compiler errors afterwards) makes it once again bootable. This crash happens very early on in boot, before even mi_startup (as the author line is never even printed): http://i.imgur.com/SAty1mT.jpg This breaks support for all i486, Pentium, Pentium Pro, and Pentium II-based CPUs and computers. These are not only found in older computers that are useful as routers and file servers, but there are some new SoCs still using these chips: Intel Galileo board http://www.frys.com/product/8080584 Pentium core, no MMX/SSE whatsoever. Released late 2014. AMD Elan SC520, Geode series http://www.eurotech.com/en/products/CPU-1421 http://www.amd.com/en-us/products/embedded/processors/lx While the Elan is no longer manufactured, it still remains popular. The new Geode LX series of processors only implement MMX (so are roughly equivalent to a Pentium Pro in terms of instruction set). Backing out r273995 allows boot to proceed normally, as shown here: http://imgur.com/a/WWsa5 I attempted to revert locore.S to see if it was related to the stack setup changes found in that commit and it made no difference; the panic was the same. I would be willing to test any patches/diffs on any or all of the systems I have, but unfortunately I'm in a bit over my head trying to figure out which part of this commit is causing it. Best, Andrew -- Andrew Wilcox, C/C++/Python developer, kernel hacker Blog: http://blog.foxkit.us/ WWW: http://foxkit.us/ GitHub: https://github.com/awilfoxReceived on Fri Feb 20 2015 - 20:16:32 UTC
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