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Subject: Re: [PATCH] kvm: lapic: add module parameters for
 LAPIC_TIMER_ADVANCE_ADJUST_MAX/MIN
From:   Haiwei Li <lihaiwei.kernel@gmail.com>
To:     linux-kernel@vger.kernel.org, kvm@vger.kernel.org
Cc:     pbonzini@redhat.com, seanjc@google.com, vkuznets@redhat.com,
        wanpengli@tencent.com, jmattson@google.com, joro@8bytes.org,
        Haiwei Li <lihaiwei@tencent.com>
References: <20210303020946.26083-1-lihaiwei.kernel@gmail.com>
Message-ID: <03239d81-df56-a6c9-c79d-c14d22f62705@gmail.com>
Date:   Wed, 3 Mar 2021 10:39:29 +0800
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On 21/3/3 10:09, lihaiwei.kernel@gmail.com wrote:
> From: Haiwei Li <lihaiwei@tencent.com>
> 
> In my test environment, advance_expire_delta is frequently greater than
> the fixed LAPIC_TIMER_ADVANCE_ADJUST_MAX. And this will hinder the
> adjustment.

Supplementary details:

I have tried to backport timer related features to our production
kernel.

After completed, i found that advance_expire_delta is frequently greater
than the fixed value. It's necessary to trun the fixed to dynamically
values.

-- 
Haiwei Li