δΊ 2013-6-13 4:10, Paolo Bonzini ει:
Il 12/06/2013 10:11, Benjamin Herrenschmidt ha scritto:
On Wed, 2013-06-12 at 10:00 -0400, Paolo Bonzini wrote:
The only bug we have is not a performance bug related to compression;
it's that writing zero pages breaks overcommit. Let's fix that, and
only tha
Il 12/06/2013 10:11, Benjamin Herrenschmidt ha scritto:
> On Wed, 2013-06-12 at 10:00 -0400, Paolo Bonzini wrote:
>> The only bug we have is not a performance bug related to compression;
>> it's that writing zero pages breaks overcommit. Let's fix that, and
>> only that.
>
> Right, do we have a w
On Wed, 2013-06-12 at 10:00 -0400, Paolo Bonzini wrote:
> The only bug we have is not a performance bug related to compression;
> it's that writing zero pages breaks overcommit. Let's fix that, and
> only that.
Right, do we have a way to madvise "throw away" these instead ? Or do we
have a way to
Il 08/06/2013 22:53, Benjamin Herrenschmidt ha scritto:
> On Sun, 2013-06-09 at 10:16 +0800, Wenchao Xia wrote:
>>If an page was not received and destination knows that page should
>> exist according to total size, fill it with zero at destination, would
>> it solve the problem?
>
> The easies
On 10.06.2013 11:33, Benjamin Herrenschmidt wrote:
On Mon, 2013-06-10 at 19:10 +1000, Alexey Kardashevskiy wrote:
I would prefer not to completely drop the patch since it saves bandwidth and
resources.
I would like migration to do what it should do - send pages no matter what,
this is exactly w
On Mon, 2013-06-10 at 19:10 +1000, Alexey Kardashevskiy wrote:
> > I would prefer not to completely drop the patch since it saves bandwidth and
> > resources.
>
> I would like migration to do what it should do - send pages no matter what,
> this is exactly what migration is for. If there any many,
On 06/09/2013 12:52 PM, Benjamin Herrenschmidt wrote:
> On Sun, 2013-06-09 at 12:34 +1000, Alexey Kardashevskiy wrote:
>
>> It is _live_ migration, the source sends changes, same pages can change and
>> be sent several times. So we would need to turn tracking on on the
>> destination to know if so
On Sun, 2013-06-09 at 10:16 +0800, Wenchao Xia wrote:
>If an page was not received and destination knows that page should
> exist according to total size, fill it with zero at destination, would
> it solve the problem?
The easiest way to do that is to not write to those pages at the
destinatio
On Sun, 2013-06-09 at 12:34 +1000, Alexey Kardashevskiy wrote:
> It is _live_ migration, the source sends changes, same pages can change and
> be sent several times. So we would need to turn tracking on on the
> destination to know if some page was received from the source or changed by
> the dest
