linux-kernel - Re: [PATCH v6 1/4] sched/clock: interface to allow timestamps early in boot

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Message-ID: <CAOAebxvc0p-3VSziUKLu1J33W+2tvNC3Y_E9U2UWBxNM29_jBg@mail.gmail.com>
Date:   Wed, 18 Oct 2017 09:38:06 -0400
From:   Pavel Tatashin <pasha.tatashin@...cle.com>
To:     Dou Liyang <douly.fnst@...fujitsu.com>
Cc:     Thomas Gleixner <tglx@...utronix.de>,
        Peter Zijlstra <peterz@...radead.org>, linux@...linux.org.uk,
        schwidefsky@...ibm.com, heiko.carstens@...ibm.com,
        john.stultz@...aro.org, sboyd@...eaurora.org, x86@...nel.org,
        linux-kernel@...r.kernel.org, mingo@...hat.com, hpa@...or.com
Subject: Re: [PATCH v6 1/4] sched/clock: interface to allow timestamps early
 in boot

On Wed, Oct 18, 2017 at 6:01 AM, Dou Liyang <douly.fnst@...fujitsu.com> wrote:
> Hi Pasha,
>
> Sorry to reply you so late.
>
> I have test the TSC sync in our machine with DR(Dynamic Reconfiguration)
>   Linux kernel: Linux-4.14.0-rc5
>   NUMA nodes: 4 node.
>   Use clock_gettime() to reach nano-second accuracy.
>
> It is OK that we setup our reconfigurable with "tsc=unstable".
>

Excellent, thank you very much for confirming this Dou!

Pavel