Re: [Xen-devel] [GIT PULL] remove xend for 4.5 (Was: Re: [PATCH] MAINTAINERS: Exclude xend from toolstack maintainers entry)

[Matt Wilson <msw@xxxxxxxxx>]

On Mon, Mar 31, 2014 at 01:03:25PM +0100, George Dunlap wrote:
> On 03/31/2014 12:56 PM, Matt Wilson wrote:
> >On Mon, Mar 31, 2014 at 12:18:53PM +0100, Ian Campbell wrote:
> >>On Fri, 2014-03-28 at 13:09 -0400, Konrad Rzeszutek Wilk wrote:
> >[...]
> >
> >>>I don't really like adding more of 'xend has this' to the list,
> >>that's ok.
> >>
> >>>but
> >>>Jan discovered that 'xend' was using the group assigment hypercall for
> >>>PCI devices while 'xl' is not doing that.
> >>>That hypercall has certain benefits - you can use it to figure out if
> >>>all of the PCI devices underneath a bridge are assigned to one
> >>>guest and not shared amongts the guests.
> >>I think this is at the wishlist rather than blocker end of the spectrum,
> >>and probably falls under the general category of "xl pci passthrough has
> >>sharp edges"? Does that sound right?
> >Probably. There are other areas that are mightily sharp as well. They
> >might not be blockers for the project to remove Xend code from the
> >tree, but they'll be blockers for adoption of newer releases that
> >don't include Xend.
> >
> >Another for the list is AER handling. That's only implemented in Xend
> >now [1].
> 
> Well, given that AER was not mentioned 6 months ago when this came
> up, it seems that keeping xend in tree is a blocker for people
> actually asking for things to be added to xl.

Actually, we discussed it on the phone [1]. Unfortunately I didn't
complete my assigned action item to post on the list.

> I think as Ian said, it's time to "tear off the plaster" (plaster ==
> band-aid, for those in the US).  If that means people don't migrate
> to 4.5, but actually report their requirements so that they can move
> to 4.6, it will be worth it in the long run.

I agree.

--msw

[1] 
http://wiki.xenproject.org/wiki/TCT_Meeting/November_2013_Minutes#Review_Action_items

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