linux-kernel - Re: [PATCH] hv_balloon: Add the support of hibernation

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Message-ID: <dfee4472-da92-fdc7-f277-c98c2e37d09b@redhat.com>
Date:   Thu, 12 Sep 2019 12:11:34 +0200
From:   David Hildenbrand <david@...hat.com>
To:     Dexuan Cui <decui@...rosoft.com>,
        KY Srinivasan <kys@...rosoft.com>,
        Haiyang Zhang <haiyangz@...rosoft.com>,
        Stephen Hemminger <sthemmin@...rosoft.com>,
        "sashal@...nel.org" <sashal@...nel.org>,
        "linux-hyperv@...r.kernel.org" <linux-hyperv@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        Michael Kelley <mikelley@...rosoft.com>
Subject: Re: [PATCH] hv_balloon: Add the support of hibernation

On 12.09.19 12:08, David Hildenbrand wrote:
> On 12.09.19 01:36, Dexuan Cui wrote:
>> When hibernation is enabled, we must ignore the balloon up/down and
>> hot-add requests from the host, if any.
>>
>> Fow now, if people want to test hibernation, please blacklist hv_balloon
>> or do not enable Dynamic Memory and Memory Resizing. See the comment in
>> balloon_probe() for more info.
>>
> 
> Why do you even care about supporting hibernation? Can't you just pause
> the VM in the hypervisor and continue to live a happy life? :)

(to be more precise, most QEMU/KVM distributions I am aware of don't
support suspend/hibernation of guests for said reason, so I wonder why
Hyper-V needs it)


-- 

Thanks,

David / dhildenb