[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] Re: [Xen-devel] [PATCH] x86: don't write_tsc() non-zero values on CPUs updating only the lower 32 bits
>>> On 14.04.11 at 23:06, Keir Fraser <keir.xen@xxxxxxxxx> wrote: > On 14/04/2011 19:33, "Wang, Winston L" <winston.l.wang@xxxxxxxxx> wrote: >> Great efforts for turning the test code re-validate the processor with >> (X86_FEATURE_TSC_RELIABLE) set. We know for sure that the broken old >> processors any write TSC will Zero the upper 32 bit. So can we move this > test >> code as early as possible, say immediately after the early Processor init > code >> where checking CPU id and set X86_FEATURE_TSC_RELIABLE? > > For our meaning of TSC_RELIABLE, there's no need for its setting to rely on > TSC 64-bit writability. I think leaving it where it is in init_xen_time() is > probably fine. So do I think - I already tried to carefully pick the place where this is best done. Jan _______________________________________________ Xen-devel mailing list Xen-devel@xxxxxxxxxxxxxxxxxxx http://lists.xensource.com/xen-devel
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