Re: [Publicity] Media Opp: Sean Michael Kerner - Xen Project 4.4

[Konrad Rzeszutek Wilk <konrad.wilk@xxxxxxxxxx>]

Q3:

Xen has an ParaVirtualization mode (PV) for guest wherein there are no emulated 
devices present. It eliminates extra overhead and minimizes the attack vector. 
The PVH takes PV mode and instead of the hypervisor doing most of the kernel 
bookkeeping the hardware extensions (EPT, NPT) take care of it. The end result 
is that the overhead of doing this in an HVM (Hardware Virtual Machine) 
container is much lower providing lower latency and higher throughput for 
guests.

Q1: ARM had been marked as experimental and now that it is a stable support 
along with a set in stone ABI. This means that going forward kernels are 
guaranteed that the communication to the hypervisor will be supported in this 
fashion for years to come.

Q2: The event channel changes (also known as FIFO events) revamp how events 
(aka interrupts but much more lightweight) are delivered and processed. The end 
result is that we can easily launch thousands (and more) of guests on one host. 
That translates to higher density with faster response time.

Q6: Xen 4.5 yes and the bugfix branches of Xen 4.4.x, Xen 4.3.x and Xen 4.2.x.

Q5:Â Put more pressure to make the release on time and with more community 
helping in testing and reporting bugs.

On Mar 7, 2014 6:23 PM, Sarah Conway <sconway@xxxxxxxxxxxxxxxxxxx> wrote:
>
> Konrad,
>
> Is this something you could take the lead on since it's via email?
>
> Thanks,
>
>
> On Fri, Mar 7, 2014 at 5:46 PM, Sarah Conway <sconway@xxxxxxxxxxxxxxxxxxx> 
> wrote:
>>
>> Hi all,
>>
>> Per the subject line, Sean Michael Kerner, who writes for eWeek, 
>> Internetnews.com and ServerWatch.com, sent these questions. He covers Linux 
>> and open source and is quite familiar with Xen. He wrote this pro-Xen 
>> article last fall: Â
>> http://www.serverwatch.com/server-news/how-xen-virtualization-got-its-zen-back-linuxcon.html
>>
>> Thanks,
>>
>>
>>
>>
>> On Fri, Mar 7, 2014 at 4:57 PM, Sarah Conway <sconway@xxxxxxxxxxxxxxxxxxx> 
>> wrote:
>>>
>>> Hi all.
>>>
>>> Can someone please provide some responses to the questions below as soon as 
>>> possible?
>>>
>>> Thanks.
>>>
>>> >
>>> > q1) How does Xen 4.4 extend support for ARM? Wasn't ARM supported before 
>>> > - so what's new/different/enhanced?
>>> >
>>> > q2) How has Xen 4.4 been improved specifically for cloud deployments?Â
>>> > Ââ what is the new event channel implementation that Citrix contributed?
>>> >
>>> > q3) What is PVH mode? (and what does PVH stand for?) what will it enable 
>>> > that wasn't possible before?
>>> >
>>> > q4) Why add support for SPICE now? Isn't SPICE directly linked to KVM 
>>> > (and its' originator Red Hat / Qumranet)
>>> >
>>> > q5) How has the Linux Foundation collaboration project model helped to 
>>> > make Xen 4.4 a btr release than it would have been - say outside of the 
>>> > LF model?
>>> >
>>> > q6) What's next for Xen? 4.5?
>>> >
>>
>>
>>
>>
>> -- 
>> Sarah Conway
>> PR Manager
>> The Linux Foundation
>> sconway@xxxxxxxxxxxxxxxxxxx
>> (978) 578-5300 ÂCell
>> Skype: Âsarah.k.conway
>
>
>
>
> -- 
> Sarah Conway
> PR Manager
> The Linux Foundation
> sconway@xxxxxxxxxxxxxxxxxxx
> (978) 578-5300 ÂCell
> Skype: Âsarah.k.conway
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