linux-kernel - Re: [PATCH v6 03/10] KVM: selftests: Use flag CLOCK_MONOTONIC

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Message-ID: <1f892f30-1a72-1bcb-462f-b3d6f2bababb@redhat.com>
Date:   Sat, 17 Apr 2021 15:23:15 +0200
From:   Paolo Bonzini <pbonzini@...hat.com>
To:     Yanan Wang <wangyanan55@...wei.com>,
        Andrew Jones <drjones@...hat.com>, kvm@...r.kernel.org,
        linux-kselftest@...r.kernel.org, linux-kernel@...r.kernel.org
Cc:     Ben Gardon <bgardon@...gle.com>,
        Sean Christopherson <seanjc@...gle.com>,
        Vitaly Kuznetsov <vkuznets@...hat.com>,
        Peter Xu <peterx@...hat.com>, Ingo Molnar <mingo@...nel.org>,
        Adrian Hunter <adrian.hunter@...el.com>,
        Jiri Olsa <jolsa@...hat.com>,
        Arnaldo Carvalho de Melo <acme@...hat.com>,
        Arnd Bergmann <arnd@...db.de>,
        Michael Kerrisk <mtk.manpages@...il.com>,
        Thomas Gleixner <tglx@...utronix.de>,
        wanghaibin.wang@...wei.com, yuzenghui@...wei.com
Subject: Re: [PATCH v6 03/10] KVM: selftests: Use flag CLOCK_MONOTONIC_RAW for
 timing

On 30/03/21 10:08, Yanan Wang wrote:
> In addition to function of CLOCK_MONOTONIC, flag CLOCK_MONOTONIC_RAW can
> also shield possiable impact of NTP, which can provide more robustness.
> 
> Suggested-by: Vitaly Kuznetsov<vkuznets@...hat.com>
> Signed-off-by: Yanan Wang<wangyanan55@...wei.com>
> Reviewed-by: Ben Gardon<bgardon@...gle.com>
> Reviewed-by: Andrew Jones<drjones@...hat.com>

I'm not sure about this one, is the effect visible?

Paolo