Hi all, We're at the stage with the illumos/SmartOS KPTI (Meltdown mitigation) work now that we would like to solicit help with testing from the community. So for those keen to help out with some testing, you can find links to a platform image with KPTI (and full DEBUG assertions) below.
This is plain KPTI with no PCID support yet. These images have held up to our initial testing (they can run e.g. the dtest suite, stand up a CoaL or simple Manta, basic LX functionality seems to work), so please try whatever unusual and interesting workloads you can find on them. Of special interest to us is anybody who has a machine that takes MCEs (machine check exceptions) a lot (e.g. because of a bad ECC DIMM that's reporting errors), workloads making extensive use of/causing floating point exceptions, and workloads that make use of LDTs (if we have any? anyone?). When you find issues, please reply to this mailinglist thread here on smartos-discuss@ so I can keep track of them easily :) Also please note that these are from a DEBUG build, so it's probably a bad idea to compare performance unless you're doing it very carefully and your baseline is another DEBUG build pre-KPTI (i.e. *not* a regular production SmartOS image). These will be quite a bit slower than a regular non-DEBUG image. https://us-east.manta.joyent.com/arekinath/public/kpti/20180130T004501Z/platform-20180130T004501Z.iso https://us-east.manta.joyent.com/arekinath/public/kpti/20180130T004501Z/platform-20180130T004501Z.tgz https://us-east.manta.joyent.com/arekinath/public/kpti/20180130T004501Z/platform-20180130T004501Z.usb.bz2 We're not soliciting code review just yet, because we know we still need to clean some stuff up. But we want to find bugs. :) If it's particularly useful to be able to see the code for the testing you want to do, it's at https://github.com/rmustacc/illumos-gate/tree/kpti-rebase Thanks! - Alex (on behalf of Robert and John and everyone else who's been helping out)
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