Jan Kiszka wrote: > Dietmar Maurer wrote: >> Hi Jan, >> >> The ubuntu code puts some barrier around the read. >> >> http://kernel.ubuntu.com/git?p=ubuntu/ubuntu-hardy.git;a=commitdiff;h=198b348d96c9769153e72ca2461f8d841ddff1cc >> >> You simply override this with your own code - without barrier. Do you think this is correct? > > Unless I messed it up again, I "overwrote" it with what is in latest > mainline regarding native_read_tsc. But I will check once more. The removal of those barriers came with 0d12cdd5f883f508d33b85c1bae98fa28987c8c7 (sched: improve sched_clock() performance). So this is now an upstream question: Do we bother about the precision of native_read_tsc in svm or not? Jan -- Siemens AG, Corporate Technology, CT T DE IT 1 Corporate Competence Center Embedded Linux -- To unsubscribe from this list: send the line "unsubscribe kvm" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
