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    SubjectRe: [PATCH v2 8/9] KVM, VMX: Add support for guest/host-only profiling
    On Wed, Oct 05, 2011 at 04:19:39PM +0200, Peter Zijlstra wrote:
    > On Wed, 2011-10-05 at 14:01 +0200, Gleb Natapov wrote:
    > > +static void atomic_switch_perf_msrs(struct vcpu_vmx *vmx)
    > > +{
    > > + int i, nr_msrs;
    > > + struct perf_guest_switch_msr *msrs;
    > > +
    > > + msrs = perf_guest_get_msrs(&nr_msrs);
    > > +
    > > + if (!msrs)
    > > + return;
    > > +
    > > + for (i = 0; i < nr_msrs; i++)
    > > + if (msrs[i].host == msrs[i].guest)
    > > + clear_atomic_switch_msr(vmx, msrs[i].msr);
    > > + else
    > > + add_atomic_switch_msr(vmx, msrs[i].msr, msrs[i].guest,
    > > + msrs[i].host);
    > > +}
    >
    > I don't think this will actually compile with PERF_EVENTS=n due to
    > struct perf_guest_switch_msr not being defined.
    Oops you are right. Turns out it is not enough to remove PERF_EVENTS
    from .config to disable it. It re-appears after "make oldconfig". Should
    I send incremental patch to fix that?

    --
    Gleb.


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