linux-kernel - Re: [PATCH] kvm: lapic: add module parameters for LAPIC_TIMER_ADVANCE_ADJUST

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Date:   Wed, 3 Mar 2021 10:39:29 +0800
From:   Haiwei Li <lihaiwei.kernel@...il.com>
To:     linux-kernel@...r.kernel.org, kvm@...r.kernel.org
Cc:     pbonzini@...hat.com, seanjc@...gle.com, vkuznets@...hat.com,
        wanpengli@...cent.com, jmattson@...gle.com, joro@...tes.org,
        Haiwei Li <lihaiwei@...cent.com>
Subject: Re: [PATCH] kvm: lapic: add module parameters for
 LAPIC_TIMER_ADVANCE_ADJUST_MAX/MIN

On 21/3/3 10:09, lihaiwei.kernel@...il.com wrote:
> From: Haiwei Li <lihaiwei@...cent.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