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    SubjectRe: [RFC] x86: xsave/xrstor support, ucontext_t extensions
    * H. Peter Anvin (hpa@zytor.com) wrote:
    > Suresh Siddha wrote:
    >>
    >> hpa, What is the virtualization problem? Are you referring to perf problem?
    >> As you noted, regular non-rt signal handlers won't need this cpuid check. It's
    >> needed only for those who manually look at non-rt signal frames and interpret it.
    >> And also, they can do this check only once and not everytime.
    >>
    >
    > No, relying on CPUID and vdso both have implications for virtualization.

    hmm, what implications? cpuid is dealt with already.


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