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Date:   Tue, 11 Oct 2022 16:01:46 +0200
From:   Peter Zijlstra <peterz@infradead.org>
To:     Zhang Rui <rui.zhang@intel.com>
Cc:     Dave Hansen <dave.hansen@intel.com>,
        Feng Tang <feng.tang@intel.com>,
        Thomas Gleixner <tglx@linutronix.de>,
        Ingo Molnar <mingo@redhat.com>, Borislav Petkov <bp@alien8.de>,
        "H . Peter Anvin" <hpa@zytor.com>, x86@kernel.org,
        linux-kernel@vger.kernel.org, tim.c.chen@intel.com,
        Xiongfeng Wang <wangxiongfeng2@huawei.com>,
        Yu Liao <liaoyu15@huawei.com>
Subject: Re: [PATCH] x86/tsc: Extend the watchdog check exemption to 4S/8S
 machine
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On Tue, Oct 11, 2022 at 09:33:26PM +0800, Zhang Rui wrote:

> topology_max_packages() or variable logical_packages can tell the
> maximum packages.
> But this check_system_tsc_reliable() is done in early boot phase where
> we have boot cpu only. And the cpu topology is not built up at this
> stage.

Is there a problem with disabling the TSC watchdog later in boot --
after SMP bringup for example?