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Re: [Xen-devel] Prepping for GSOC 2014 [URGENT] - deadline Feb 14 2014
________________________________________
From: Ian Campbell
Sent: Wednesday, February 05, 2014 9:09 AM
To: lars.kurth@xen.org; Roger Pau Monne; Dario Faggioli; Konrad Rzeszutek Wilk; Ben Guthro; Andrew Cooper; Paul Durrant; Santosh Jodh; Ian Jackson
Cc: xen-devel@lists.xen.org; xen-api@lists.xen.org; mirageos-devel@lists.xenproject.org
Subject: Re: [Xen-devel] Prepping for GSOC 2014 [URGENT] - deadline Feb 14 2014


> Ben:
> * dom0 kgdb support
>
> Is this for GSoC?

This has been on there a while, and could be a GSoC project - there has been some development in the Xen IPI support since this was written, so it may work better than advertised here.

That said, Fri is my last day working for Citrix (and consequently, on Xen) - and I'll be moving on to a Start-up company again, so someone else would need to sponsor this project.

Naturally, I'll be available via my Non-Citrix email address (ben@guthro.net)


Ben

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Re: [Xen-devel] Prepping for GSOC 2014 [URGENT] - deadline Feb 14 2014 [ In reply to ]
On Wed, Feb 05, 2014 at 02:18:40PM +0000, Ben Guthro wrote:
>
> ________________________________________
> From: Ian Campbell
> Sent: Wednesday, February 05, 2014 9:09 AM
> To: lars.kurth@xen.org; Roger Pau Monne; Dario Faggioli; Konrad Rzeszutek Wilk; Ben Guthro; Andrew Cooper; Paul Durrant; Santosh Jodh; Ian Jackson
> Cc: xen-devel@lists.xen.org; xen-api@lists.xen.org; mirageos-devel@lists.xenproject.org
> Subject: Re: [Xen-devel] Prepping for GSOC 2014 [URGENT] - deadline Feb 14 2014
>
>
> > Ben:
> > * dom0 kgdb support
> >
> > Is this for GSoC?
>
> This has been on there a while, and could be a GSoC project - there has been some development in the Xen IPI support since this was written, so it may work better than advertised here.

And it actually works!
>
> That said, Fri is my last day working for Citrix (and consequently, on Xen) - and I'll be moving on to a Start-up company again, so someone else would need to sponsor this project.
>
> Naturally, I'll be available via my Non-Citrix email address (ben@guthro.net)
>
>
> Ben

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Re: [Xen-devel] Prepping for GSOC 2014 [URGENT] - deadline Feb 14 2014 [ In reply to ]
On Wed, 2014-02-05 at 09:29 -0500, Konrad Rzeszutek Wilk wrote:
> On Wed, Feb 05, 2014 at 02:18:40PM +0000, Ben Guthro wrote:
> >
> > ________________________________________
> > From: Ian Campbell
> > Sent: Wednesday, February 05, 2014 9:09 AM
> > To: lars.kurth@xen.org; Roger Pau Monne; Dario Faggioli; Konrad Rzeszutek Wilk; Ben Guthro; Andrew Cooper; Paul Durrant; Santosh Jodh; Ian Jackson
> > Cc: xen-devel@lists.xen.org; xen-api@lists.xen.org; mirageos-devel@lists.xenproject.org
> > Subject: Re: [Xen-devel] Prepping for GSOC 2014 [URGENT] - deadline Feb 14 2014
> >
> >
> > > Ben:
> > > * dom0 kgdb support
> > >
> > > Is this for GSoC?
> >
> > This has been on there a while, and could be a GSoC project - there has been some development in the Xen IPI support since this was written, so it may work better than advertised here.
>
> And it actually works!

OK, I'll nuke it from the list hten, thanks!

> >
> > That said, Fri is my last day working for Citrix (and consequently,
> on Xen) - and I'll be moving on to a Start-up company again,

Good luck!

Ian.


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Re: [Xen-devel] Prepping for GSOC 2014 [URGENT] - deadline Feb 14 2014 [ In reply to ]
On Wed, Feb 05, 2014 at 02:09:08PM +0000, Ian Campbell wrote:
> On Tue, 2014-01-28 at 13:54 +0000, Lars Kurth wrote:
> > Hi all,
> > I have not gotten any reply to this thread. I saw Wei Lui and Andrés
> > Lagar-Cavilla make changes to the project list. Please go through the
> > items below and make changes as suggested. Otherwise, our chances to get
> > into GSoC 2014 will be relatively slim.
>
> Going through the list, people listed as technical contacts for projects
> with GSoC == yes (or unknown) are in the To line. Please reiterate your
> interest in mentoring the project(s) and update or remove the entry as
> necessary.
>
> I skipped things added recently and I skipped "Xen Cloud Platform (XCP)
> and XAPI projects", someone else can pick that up.
>
> And to reiterate what Lars said:
>
> > Add new work items : we ought to have a few sexy topics on say
> > Real-time, mobile and some of the other segments (assuming we can get
> > HW)
> [...]
> > b) Anyone who has some kernel/linux/bsd/distro/qemu work-items, should
> > get these listed on the respective other programs. And we should link
> > to these from our project page.
>
> The list:
>
> Pasi:
> * Implement Xen PVSCSI support in xl/libxl toolstack
> * Implement Xen PVUSB support in xl/libxl toolstack
>
> Both have unanswered questions posed by Lars in January 2013.
>
> Konrad:
> * Block backend/frontend improvements
>
> I suspect a bunch of these are done? (Also CC Roger, who may
> have done them...)
>
> Was in the list twice, they looked identical so I nuked one.
>

<nods>
> * Utilize Intel QuickPath on network and block path.
>
> No comments etc, but sounds advanced for a GSoC student, plus
> its unclear when such hardware became available, are they likely
> to have it? It sounds like it might also be quite high end.
>
> * perf working with Xen
>
> Done/in progress by Boris I think

<nods>
>
> * PAT writecombine fixup
>
> Did I see a fix for this go past? GSoC == unknown?

No. Still looking for a victi^H^H^Hvolunteer.

>
> * Parallel xenwatch
>
> Bit sparse on details, GSOC == unknown

That would still be nice. It came from talking to Matt from Amazon. He
was saying that having only one xenwatch thread slows things down for
a medium to big server with lots of guests. Making multiple
xenwatch threads to process XenBus requests in parallel would be
a good improvement.

>
> * Microcode uploader implementation
>
> Done I think?

<nods>
>
> * Integrating NUMA and Tmem
>
> Lists Dan as co-maintainer -- Konrad do you want to propose this
> to the new tmem guy (I've forgotten his name)

Bob Liu. Yes, lets rope him in.
>
> * Performance tools overhaul
>
> Bit vague. And has some of this been done?

I can't remember what that is.
>
> * "Upstream bugs"
>
> There were 4 of these, dating back to 2012, I don't think this
> list is a good place to track bugs and it seems like at least
> some of them are now obsolete. So I've nuked the lot. If they
> are still relevant I think it would be best to get them into the
> bug tracker.

OK, lets nuke them.

We could also add the:

VCPUOP_register_vcpu_time_memory_area support in Linux upstream kernel.

MSI multi-vector for Linux upstream kernel.

Thought those are mostly just putting pieces together and repost them
so no "new" development.

>
> Ben:
> * dom0 kgdb support
>
> Is this for GSoC?
>
> George:
>
> * Introducing PowerClamp-like driver for Xen
>
> I don't think this has been done?
>
> Dario:
> * NUMA effects on inter-VM communication and on multi-VM workloads
>
> I think this was under way as part of the GNOME Outreach
> program. In that case perhaps it needs updating to reflect what
> has been done and what still needs to be done?
>
> * Integrating NUMA and Tmem
>
> Lists Dan as co-maintainer -- covered under Konrad's name above.
>
> * Is Xen ready for the Real-Time/Embedded World?
>
> Sounds a bit blue sky? Now that there is active interest in this
> on ARM perhaps a few concrete projects could be proposed to
> replace it?
>
> Andy:
>
> * IOMMU control for SWIOTLB, to avoid dom0 copy of all >4K DMA
> allocations
>
> Sounds too hard for a GSoC to me. Would need fleshing out in any
> case.
>
> * CPU/RAM/PCI diagram tool
>
> Does this not already exist somewhere?
>
> Paul:
>
> * HVM per-event-channel interrupts
>
> Might be easier now that Windows PV drivers are opened up?
>
> Roger:
> * Refactor Linux hotplug scripts
>
> You did some of this I think?
>
> Ian C:
>
> * XL to XCP VM motion
>
> Perhaps this could be broadened into VM transport between XL and
> other things too -- e.g. libvirt?
>
> Stefano:
>
> * VM Snapshots
>
> Still a good project I think
>
> George:
>
> * Allowing guests to boot with a passed-through GPU as the primary
> display
>
> This seems like a bit of a rathole for a GSoC student to me...
>
> * Advanced Scheduling Parameters
>
> Still to do?
>
> Santosh:
>
> * KDD (Windows Debugger Stub) enhancements
>
> Dave
>
> * Create a tiny VM for easy load testing
>
> Someone was looking at this I think?
>
> Ian J:
>
> * Testing PV and HVM installs of Debian using debian-installer
> * Testing NetBSD
>
> BSD is done I think, and I'm looking at Debian Installer stuff
> myself. I've removed these.
>
>
> Phew!
> Ian.
>
>
>
> > Lars
> >
> > On 20/01/2014 09:18, Lars Kurth wrote:
> > > Hi all,
> > >
> > > the GSoC application deadline is coming up : Feb 2014. If we want to
> > > have any chance of getting accepted this year, we ought to get our
> > > project list into good shape. The project list and how the project and
> > > menters present themselves has a bigger impact on whether we get
> > > accepted than the actual application.
> > >
> > > Also, I would like to add a mentor section this year: a short bio,
> > > what the mentor cares about and a picture. This will help make the
> > > project list more real.
> > >
> > > We have *4 weeks* to do this. The bar for GSoC has been getting
> > > increasingly high. I know, we are tied down with Xen 4.4, but this is
> > > something you need to do if you want the Xen Project to participate.
> > >
> > > a) Please, update
> > > http://wiki.xenproject.org/wiki/Xen_Development_Projects urgently
> > > (these need to be in good shape *before* the application). What I need
> > > you to do is:
> > > a.1) Remove items that are done
> > > a.2) Add new work items : we ought to have a few sexy topics on say
> > > Real-time, mobile and some of the other segments (assuming we can get HW)
> > > a.3) All project proposals need to be peer reviewed *and* clear ...
> > > The peer review process for projects we put in place last year worked
> > > well, by which we had past mentors sign of project proposals that were
> > > in good enough state.
> > >
> > > b) Anyone who has some kernel/linux/bsd/distro/qemu work-items, should
> > > get these listed on the respective other programs. And we should link
> > > to these from our project page.
> > >
> > > Best Regards
> > > Lars
> > > P.S.: I will also see whether we can participate as Xen Project under
> > > the LF GSoC program, but last year there was push-back and I don't
> > > expect this to change
> > >
> >
> >
> > _______________________________________________
> > Xen-devel mailing list
> > Xen-devel@lists.xen.org
> > http://lists.xen.org/xen-devel
>
>

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Re: [Xen-devel] Prepping for GSOC 2014 [URGENT] - deadline Feb 14 2014 [ In reply to ]
On Wed, 2014-02-05 at 09:34 -0500, Konrad Rzeszutek Wilk wrote:
> >
> > * Parallel xenwatch
> >
> > Bit sparse on details, GSOC == unknown
>
> That would still be nice. It came from talking to Matt from Amazon. He
> was saying that having only one xenwatch thread slows things down for
> a medium to big server with lots of guests. Making multiple
> xenwatch threads to process XenBus requests in parallel would be
> a good improvement.

Would need to be careful about exposing cases of insufficient locking in
the existing code.

>
> >
> > * Microcode uploader implementation
> >
> > Done I think?
>
> <nods>

Nuked

> > * Performance tools overhaul
> >
> > Bit vague. And has some of this been done?
>
> I can't remember what that is.

OK, I nuked it -- a new project can always be added if you remember what
it was.

> >
> > * "Upstream bugs"
> >
> > There were 4 of these, dating back to 2012, I don't think this
> > list is a good place to track bugs and it seems like at least
> > some of them are now obsolete. So I've nuked the lot. If they
> > are still relevant I think it would be best to get them into the
> > bug tracker.
>
> OK, lets nuke them.

Done.

>
> We could also add the:
>
> VCPUOP_register_vcpu_time_memory_area support in Linux upstream kernel.
>
> MSI multi-vector for Linux upstream kernel.
>
> Thought those are mostly just putting pieces together and repost them
> so no "new" development.

Not really suitable for this list then IMHO.

Ian.


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Re: [Xen-devel] Prepping for GSOC 2014 [URGENT] - deadline Feb 14 2014 [ In reply to ]
Hi all,

I created http://wiki.xen.org/wiki/GSoc_2014 based on the project list

Unless you guys step up, I will move all projects that have no
* level of difficulty
* skills needed
* outcomes
into http://wiki.xen.org/wiki/GSoc_2014#List_of_projects_that_need_more_work

I made a start on this and will do more on the weekend and/or monday. I
will also sort, such that easy projects come first.

I am about to submit the application in the next two hours

Regards

On 05/02/2014 14:52, Ian Campbell wrote:
> (trimming cc, most people are presumably not interested)
>
> On Wed, 2014-02-05 at 14:49 +0000, Andrew Cooper wrote:
>> On 05/02/14 14:45, Ian Campbell wrote:
>>> On Wed, 2014-02-05 at 14:40 +0000, Andrew Cooper wrote:
>>>> On 05/02/14 14:09, Ian Campbell wrote:
>>>>> Andy:
>>>>>
>>>>> * IOMMU control for SWIOTLB, to avoid dom0 copy of all >4K DMA
>>>>> allocations
>>>>>
>>>>> Sounds too hard for a GSoC to me. Would need fleshing out in any
>>>>> case.
>>>> Malcolm made a prototype for this on the first day of the Hackathon. It
>>>> can disappear.
>>> Removed.
>>>
>>>>> * CPU/RAM/PCI diagram tool
>>>>>
>>>>> Does this not already exist somewhere?
>>>> Not as far as I (or my ability to google) am aware.
>>>>
>>>> My furrowing into hwloc interacting with Xen and libxc is a start to all
>>>> of this, but it is still very much in my copious free time and there is
>>>> more than enough other work which could be done if someone were interested.
>>> OK, left in place.
>>>
>>> This could conceivably be done under another umbrella such as the Linux
>>> one too, since it seems generic.
>>>
>>> Ian.
>>>
>>>
>> For native Linux, hwloc kinda already does this already - certainly the
>> CPU and PCI bits.
> That's what I meant by "does this not alreayd exist somewhere". So it
> sounds like extending hwloc is the right answer, the blurb should
> reflect this and list the specific things which it is lacking.
>
> Can you update the description please?
>
>> Under Xen there are quite a few areas needing
>> improvement, which will require active development work.
>
>
>
> _______________________________________________
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> Xen-devel@lists.xen.org
> http://lists.xen.org/xen-devel


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