linux-kernel - Re: [PATCH v1 0/3] Virtio-balloon Improvement

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Date:   Fri, 03 Nov 2017 16:35:19 +0800
From:   Wei Wang <wei.w.wang@...el.com>
To:     "Michael S. Tsirkin" <mst@...hat.com>
CC:     penguin-kernel@...ove.SAKURA.ne.jp, mhocko@...nel.org,
        linux-kernel@...r.kernel.org, linux-mm@...ck.org,
        virtualization@...ts.linux-foundation.org
Subject: Re: [PATCH v1 0/3] Virtio-balloon Improvement

On 10/22/2017 11:19 AM, Michael S. Tsirkin wrote:
> On Fri, Oct 20, 2017 at 07:54:23PM +0800, Wei Wang wrote:
>> This patch series intends to summarize the recent contributions made by
>> Michael S. Tsirkin, Tetsuo Handa, Michal Hocko etc. via reporting and
>> discussing the related deadlock issues on the mailinglist. Please check
>> each patch for details.
>>
>> >From a high-level point of view, this patch series achieves:
>> 1) eliminate the deadlock issue fundamentally caused by the inability
>> to run leak_balloon and fill_balloon concurrently;
> We need to think about this carefully. Is it an issue that
> leak can now bypass fill? It seems that we can now
> try to leak a page before fill was seen by host,
> but I did not look into it deeply.
>
> I really like my patch for this better at least for
> current kernel. I agree we need to work more on 2+3.
>

Since we have many customers interested in the "Virtio-balloon 
Enhancement" series,
please review the v17 patches first (it has a dependency on your patch 
for that deadlock fix,
so I included it there too), and we can get back to 2+3 here after that 
series is done. Thanks.

Best,
Wei