On Wed, May 20, 2020 at 1:24 AM David Hildenbrand wrote:
>
> On 19.05.20 23:00, Alexander Duyck wrote:
> > On Tue, May 19, 2020 at 9:09 AM David Hildenbrand wrote:
[...]
>
> Let's think this through, what about this scenario:
>
> The device sets \field{free_page_hint_cmd_id}
On 19.05.20 23:00, Alexander Duyck wrote:
> On Tue, May 19, 2020 at 9:09 AM David Hildenbrand wrote:
>>
I proposed that the driver MUST reinitialize the pages when reusing
(which is what Linux does), so then this is true. Reuse implies
initializing, implies modification. It's somewh
On Tue, May 19, 2020 at 9:09 AM David Hildenbrand wrote:
>
> >> I proposed that the driver MUST reinitialize the pages when reusing
> >> (which is what Linux does), so then this is true. Reuse implies
> >> initializing, implies modification. It's somewhat simpler than what you
> >> propose, leavin
>> I proposed that the driver MUST reinitialize the pages when reusing
>> (which is what Linux does), so then this is true. Reuse implies
>> initializing, implies modification. It's somewhat simpler than what you
>> propose, leaving the case open where the driver would reuse pages by
>> only readin
On Mon, May 18, 2020 at 11:54 PM Cornelia Huck wrote:
>
> On Mon, 18 May 2020 13:15:50 -0700
> Alexander Duyck wrote:
>
> > On Mon, May 18, 2020 at 6:18 AM David Hildenbrand wrote:
> > >
> > > On 15.05.20 19:33, Alexander Duyck wrote:
>
> > > > +\subsubsection{Free Page Hinting}\label{sec:Device
On Tue, May 19, 2020 at 2:40 AM David Hildenbrand wrote:
>
> [...]
> >>> +\begin{description}
> >>> +\item[VIRTIO_BALLOON_CMD_ID_STOP (0)] Any command ID previously supplied
> >>> by
> >>> + the device is invalid. The driver should halt all hinting until a new
> >>> + command ID is supplied.
>
[...]
>>> +\begin{description}
>>> +\item[VIRTIO_BALLOON_CMD_ID_STOP (0)] Any command ID previously supplied by
>>> + the device is invalid. The driver should halt all hinting until a new
>>> + command ID is supplied.
>>
>> Maybe "The driver should stop hinting free pages, but should not reuse
>>
On Mon, 18 May 2020 13:15:50 -0700
Alexander Duyck wrote:
> On Mon, May 18, 2020 at 6:18 AM David Hildenbrand wrote:
> >
> > On 15.05.20 19:33, Alexander Duyck wrote:
> > > +\subsubsection{Free Page Hinting}\label{sec:Device Types / Memory
> > > Balloon Device / Device Operation / Free Page
On Mon, May 18, 2020 at 6:18 AM David Hildenbrand wrote:
>
> On 15.05.20 19:33, Alexander Duyck wrote:
> > From: Alexander Duyck
> >
> > Free page hints allow the balloon driver to provide information on what
> > pages are not currently in use so that we can avoid the cost of copying
> > them in
>> +
>> +\devicenormative{\paragraph}{Free Page Hinting}{Device Types / Memory
>> Balloon Device / Device Operation / Free Page Hinting}
>> +
>> +Normative statements in this section apply if the
>> +VIRTIO_BALLOON_F_FREE_PAGE_HINT feature has been negotiated.
>> +
>> +The device MUST set \field
On 15.05.20 19:33, Alexander Duyck wrote:
> From: Alexander Duyck
>
> Free page hints allow the balloon driver to provide information on what
> pages are not currently in use so that we can avoid the cost of copying
> them in migration scenarios. Add a feature description for free page hints
> de
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