linux-kernel - Re: [RFC][Patch v9 0/6] KVM: Guest Free Page Hinting

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Message-ID: <7a77ce2a-853f-86c6-6d10-1d8db8fb8ae4@redhat.com>
Date:   Wed, 6 Mar 2019 13:40:50 -0500
From:   Nitesh Narayan Lal <nitesh@...hat.com>
To:     "Michael S. Tsirkin" <mst@...hat.com>
Cc:     kvm@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-mm@...ck.org, pbonzini@...hat.com, lcapitulino@...hat.com,
        pagupta@...hat.com, wei.w.wang@...el.com, yang.zhang.wz@...il.com,
        riel@...riel.com, david@...hat.com, dodgen@...gle.com,
        konrad.wilk@...cle.com, dhildenb@...hat.com, aarcange@...hat.com,
        alexander.duyck@...il.com
Subject: Re: [RFC][Patch v9 0/6] KVM: Guest Free Page Hinting

On 3/6/19 1:38 PM, Michael S. Tsirkin wrote:
> On Wed, Mar 06, 2019 at 01:30:14PM -0500, Nitesh Narayan Lal wrote:
>>> Want to try testing Alex's patches for comparison?
>> Somehow I am not in a favor of doing a hypercall on every page (with
>> huge TLB order/MAX_ORDER -1) as I think it will be costly.
>> I can try using Alex's host side logic instead of virtio.
>> Let me know what you think?
> I am just saying maybe your setup is misconfigured
> that's why you see no speedup. 
Got it.
> If you try Alex's
> patches and *don't* see speedup like he does, then
> he might be able to help you figure out why.
> OTOH if you do then *you* can try figuring out why
> don't your patches help.
Yeap, I can do that.
Thanks.
>




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