On Fri, Feb 9, 2018 at 9:25 AM, Joerg Roedel <joro@xxxxxxxxxx> wrote: > Hi, > > here is the second version of my PTI implementation for > x86_32, based on tip/x86-pti-for-linus. It took a lot longer > than I had hoped, but there have been a number of obstacles > on the way. It also isn't the small patch-set anymore that v1 > was, but compared to it this one actually works :) One thing worth noting is that performance of this whole series is going to be abysmal due to the complete lack of 32-bit PCID. Maybe any kernel built with this option set that runs on a CPU that has the PCID bit set in CPUID should print a big fat warning like "WARNING: you are using 32-bit PTI on a 64-bit PCID-capable CPU. Your performance will increase dramatically if you switch to a 64-bit kernel." -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@xxxxxxxxx. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: <a href=mailto:"dont@xxxxxxxxx";> email@xxxxxxxxx </a>
