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    SubjectRe: [PATCH 11/11] x86/kvm: Silence per-cpu pr_info noise about KVM clocks and steal time
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    On 12/9/21 16:09, David Woodhouse wrote:
    > From: David Woodhouse<dwmw@amazon.co.uk>
    >
    > I made the actual CPU bringup go nice and fast... and then Linux spends
    > half a minute printing stupid nonsense about clocks and steal time for
    > each of 256 vCPUs. Don't do that. Nobody cares.

    Queued this one, it makes sense even without the rest of the series.

    Paolo

    > Signed-off-by: David Woodhouse<dwmw@amazon.co.uk>
    > ---
    > arch/x86/kernel/kvm.c | 6 +++---
    > arch/x86/kernel/kvmclock.c | 2 +-
    > 2 files changed, 4 insertions(+), 4 deletions(-)
    >
    > diff --git a/arch/x86/kernel/kvm.c b/arch/x86/kernel/kvm.c
    > index 59abbdad7729..a438217cbfac 100644
    > --- a/arch/x86/kernel/kvm.c
    > +++ b/arch/x86/kernel/kvm.c
    > @@ -313,7 +313,7 @@ static void kvm_register_steal_time(void)
    > return;
    >
    > wrmsrl(MSR_KVM_STEAL_TIME, (slow_virt_to_phys(st) | KVM_MSR_ENABLED));
    > - pr_info("stealtime: cpu %d, msr %llx\n", cpu,
    > + pr_debug("stealtime: cpu %d, msr %llx\n", cpu,
    > (unsigned long long) slow_virt_to_phys(st));
    > }
    >
    > @@ -350,7 +350,7 @@ static void kvm_guest_cpu_init(void)
    >
    > wrmsrl(MSR_KVM_ASYNC_PF_EN, pa);
    > __this_cpu_write(apf_reason.enabled, 1);
    > - pr_info("setup async PF for cpu %d\n", smp_processor_id());
    > + pr_debug("setup async PF for cpu %d\n", smp_processor_id());
    > }
    >
    > if (kvm_para_has_feature(KVM_FEATURE_PV_EOI)) {
    > @@ -376,7 +376,7 @@ static void kvm_pv_disable_apf(void)
    > wrmsrl(MSR_KVM_ASYNC_PF_EN, 0);
    > __this_cpu_write(apf_reason.enabled, 0);
    >
    > - pr_info("disable async PF for cpu %d\n", smp_processor_id());
    > + pr_debug("disable async PF for cpu %d\n", smp_processor_id());
    > }
    >
    > static void kvm_disable_steal_time(void)
    > diff --git a/arch/x86/kernel/kvmclock.c b/arch/x86/kernel/kvmclock.c
    > index 462dd8e9b03d..a35cbf9107af 100644
    > --- a/arch/x86/kernel/kvmclock.c
    > +++ b/arch/x86/kernel/kvmclock.c
    > @@ -174,7 +174,7 @@ static void kvm_register_clock(char *txt)
    >
    > pa = slow_virt_to_phys(&src->pvti) | 0x01ULL;
    > wrmsrl(msr_kvm_system_time, pa);
    > - pr_info("kvm-clock: cpu %d, msr %llx, %s", smp_processor_id(), pa, txt);
    > + pr_debug("kvm-clock: cpu %d, msr %llx, %s", smp_processor_id(), pa, txt);
    > }
    >
    > static void kvm_save_sched_clock_state(void)
    > -- 2.31.1
    >

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