Re: Xen 4.4 development update

From: Dario Faggioli <dario.faggioli@citrix.com>
To: George Dunlap <George.Dunlap@eu.citrix.com>
Cc: Li Yechen <lccycc123@gmail.com>, Matt Wilson <msw@amazon.com>,
	Elena Ufimtseva <ufimtseva@gmail.com>,
	"xen-devel@lists.xen.org" <xen-devel@lists.xen.org>
Subject: Re: Xen 4.4 development update
Date: Fri, 9 Aug 2013 16:10:10 +0200	[thread overview]
Message-ID: <1376057410.19531.161.camel@Solace> (raw)
In-Reply-To: <CAFLBxZaq2ZxHqLGYWEdNiHXABbZHe5cMLnY22Vx6jcCYMi31_g@mail.gmail.com>

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On gio, 2013-08-08 at 17:09 +0100, George Dunlap wrote:
> = Timeline =
> 
> As discussed elsewhere, I am proposing a 6-month release cycle.  Xen
> 4.3 was released on 9 July.  That would give us a release on 9 January
> 2014.  This is fairly close after the Christmas season, so I propose
> to make the estimated release date later, on 21 January, giving a few
> extra weeks for the holiday season:
> 
> * Feature freeze: 18 October 2013
> * Code freezing point: 8 November 2013
> * First RC: 26 November 2013
> * Release: 21 January 2014
> 
18 October... Tight. At least code freeze is a bit later! :-P

> Last updated: 8 August 2013
>
> == Backlog ==
> 
> === Testing coverage ===
> 
> [..]
>
 * Performance benchmarking on top of osstest
  @dario

> === Big ticket items ===
> 
> * NUMA Memory migration
>   owner: dario@citrix
>   status: in progress
> 
Confirmed to be in progress.

> * Meta: PVIO NUMA improvements
>  - NUMA affinity for vcpus
>     owner: Dario
>
status: in progress

>  - PV guest NUMA interface
>     owner: Elena
>
status: in progress

Right Elena?

>  - Sensible dom0 NUMA layout
>
status: not started

>  - Toolstack pinning backend thread / virq to appropraite d0 vcpu
>
status: not started

Also, we might want to add:

  - HVM guest NUMA
     owner: Matt Wilson
     status: ?

Is that ok, Matt?

If you're concerned about the libxl part of that, I have a series half
backed that I'll be posting here soon (as RFC or something), so feel
free to leave that to me. :-)

And this one too:

  - NUMA-aware ballooning
     owner: Li Yechen
     status: ?

Is that ok, Yechen?

> * libvirt/libxl integration (external)
>  > need a status update
>  - owner: jfehlig@suse, dario@citrix
>
Yep, putting together a status update right in these days (I plan a
XenSummit talk about it)

> === clean-ups ===
> 
> * Sort out better memory / ballooning / dom0 autoballooning thing
>  > Don't forget NUMA angle
>
Mmm... This is an old discussion which, if I remember correctly (at
least what the "NUMA angle" was), is about a TOCTOU issue involving
automatic NUMA placement and ballooning, domain creation, and perhaps
even more memory related operations (depends on the toolstack)... It's
not "just" a ballooning or autoballooning  problem, and it's completely
different from the "NUMA-aware ballooning" I was talking about before.

I don't have much in mind to properly deal with it. One think I can
double check is whether the claim mechanism Oracle introduced can be of
any help, but nothing much than that for now.

In any case, at least from my side, this is as follows.

status: not started.

Regards,
Dario

-- 
<<This happens because I choose it to happen!>> (Raistlin Majere)
-----------------------------------------------------------------
Dario Faggioli, Ph.D, http://about.me/dario.faggioli
Senior Software Engineer, Citrix Systems R&D Ltd., Cambridge (UK)

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