Re: Xen 4.2 TODO List

Re: Xen 4.2 TODO List

[Andres Lagar-Cavilla]

> Date: Mon, 23 Jan 2012 13:19:05 +0000
> From: Ian Campbell <Ian.Campbell@citrix.com>
> To: xen-devel <xen-devel@lists.xensource.com>
> Subject: [Xen-devel] Xen 4.2 TODO List Update
> Message-ID: <1327324745.24561.124.camel@zakaz.uk.xensource.com>
> Content-Type: text/plain; charset="UTF-8"
>
> Newly updated list follows. Please send me corrections (especially
> "done"). I've stopped CCing everyone, since I guess it is mostly spam to
> the majority.
>
> hypervisor, blockers:
>
>       * round-up of the closing of the security hole in MSI-X
>         passthrough (uniformly - i.e. even for Dom0 - disallowing write
>         access to MSI-X table pages). (Jan Beulich -- more fixes
>         required than first thought, patches posted)
>       * domctls / sysctls set up to modify scheduler parameters, like
>         the credit1 timeslice and schedule rate. (George Dunlap)
>       * get the interface changes for sharing/paging/mem-events done and
>         dusted so that 4.2 is a stable API that we hold to. (Tim Deegan,
>         Andres Lagar-Cavilla et al)
>               * mem event ring management posted, seems close to going
>                 in.
Mem event ring management has gone in, so you can chalk it off the list.

>               * sharing patches posted
A repost of the sharing queue Wed evening, after the last round of
comments. Any feedback from tools maintainers on "[PATCH 09 of 12] Update
memshr API and tools"?

Thanks
Andres

>
> tools, blockers:
>
>       * libxl stable API -- we would like 4.2 to define a stable API
>         which downstream's can start to rely on not changing. Aspects of
>         this are:
>               * event handling (Ian Jackson, posted several rounds,
>                 nearing completion?)
>               * drop libxl_device_model_info (move bits to build_info or
>                 elsewhere as appropriate) (Ian Campbell, first RFC sent)
>               * add libxl_defbool and generally try and arrange that
>                 memset(foo,0,...) requests the defaults (Ian Campbell,
>                 first RFC sent)
>               * topologyinfo datastructure should be a list of tuples,
>                 not a tuple of lists. (nobody currently looking at this,
>                 not 100% sure this makes sense, could possibly defer and
>                 change after 4.2 in a compatible way)
>       * xl to use json for machine readable output instead of sexp by
>         default (Ian Campbell to revisit existing patch)
>       * xl support for vcpu pinning (Dario Faggioli)
>       * xl feature parity with xend wrt driver domain support (George
>         Dunlap)
>       * Integrate qemu+seabios upstream into the build (patches
>         reposted, pending). No change in default qemu for 4.2.
>       * More formally deprecate xm/xend. Manpage patches already in
>         tree. Needs release noting and communication around -rc1 to
>         remind people to test xl.
>
> hypervisor, nice to have:
>
>       * solid implementation of sharing/paging/mem-events (using work
>         queues) (Tim Deegan, Olaf Herring et al)
>       * A long standing issue is a fully synchronized p2m (locking
>         lookups) (Andres Lagar-Cavilla)
>       * NUMA improvement: domain affinity consistent with cpupool
>         membership (Dario Faggioli, Jeurgen Gross -- patch posted)
>
> tools, nice to have:
>
>       * Hotplug script stuff -- internal to libxl (I think, therefore I
>         didn't put this under stable API above) but still good to have
>         for 4.2? Roger Pau Monet was looking at this but its looking
>         like a big can-o-worms. (discussion on-going)
>       * Block script support -- follows on from hotplug script (Roger
>         Pau Monet)
>       * libyajl v2 support (patch posted by Roger Pau Monet, blocked on
>         autoconf?)
>       * Configure/control paging via xl/libxl (Olaf Herring)
>       * Upstream qemu feature patches:
>               * Upstream qemu PCI passthrough support (Anthony Perard)
>               * Upstream qemu save restore (Anthony Perard)
>       * Nested-virtualisation (currently should be marked
>         experimental,likely to release that way? Consider nested-svm
>         separate to nested-vmx. Nested-svm is in better shape)
>
> Tools, need to decide if pre- or post-4.2 feature:
>
>       * Autoconf (Roger Pau Monet posted a patch)
>
>
>

Re: Xen 4.2 TODO List

[Konrad Rzeszutek Wilk]

On Mon, Jan 23, 2012 at 07:03:09AM -0800, Andres Lagar-Cavilla wrote:
> > Date: Mon, 23 Jan 2012 13:19:05 +0000
> > From: Ian Campbell <Ian.Campbell@citrix.com>
> > To: xen-devel <xen-devel@lists.xensource.com>
> > Subject: [Xen-devel] Xen 4.2 TODO List Update
> > Message-ID: <1327324745.24561.124.camel@zakaz.uk.xensource.com>
> > Content-Type: text/plain; charset="UTF-8"
> >
> > Newly updated list follows. Please send me corrections (especially
> > "done"). I've stopped CCing everyone, since I guess it is mostly spam to
> > the majority.
> >
> > hypervisor, blockers:
> >
> >       * round-up of the closing of the security hole in MSI-X
> >         passthrough (uniformly - i.e. even for Dom0 - disallowing write
> >         access to MSI-X table pages). (Jan Beulich -- more fixes
> >         required than first thought, patches posted)
> >       * domctls / sysctls set up to modify scheduler parameters, like
> >         the credit1 timeslice and schedule rate. (George Dunlap)
> >       * get the interface changes for sharing/paging/mem-events done and
> >         dusted so that 4.2 is a stable API that we hold to. (Tim Deegan,
> >         Andres Lagar-Cavilla et al)
> >               * mem event ring management posted, seems close to going
> >                 in.
> Mem event ring management has gone in, so you can chalk it off the list.

Any progress on the pvops side of this? This is the -EBUSY patches
right?

Re: Xen 4.2 TODO List

[Andres Lagar-Cavilla]

> On Mon, Jan 23, 2012 at 07:03:09AM -0800, Andres Lagar-Cavilla wrote:
>> > Date: Mon, 23 Jan 2012 13:19:05 +0000
>> > From: Ian Campbell <Ian.Campbell@citrix.com>
>> > To: xen-devel <xen-devel@lists.xensource.com>
>> > Subject: [Xen-devel] Xen 4.2 TODO List Update
>> > Message-ID: <1327324745.24561.124.camel@zakaz.uk.xensource.com>
>> > Content-Type: text/plain; charset="UTF-8"
>> >
>> > Newly updated list follows. Please send me corrections (especially
>> > "done"). I've stopped CCing everyone, since I guess it is mostly spam
>> to
>> > the majority.
>> >
>> > hypervisor, blockers:
>> >
>> >       * round-up of the closing of the security hole in MSI-X
>> >         passthrough (uniformly - i.e. even for Dom0 - disallowing
>> write
>> >         access to MSI-X table pages). (Jan Beulich -- more fixes
>> >         required than first thought, patches posted)
>> >       * domctls / sysctls set up to modify scheduler parameters, like
>> >         the credit1 timeslice and schedule rate. (George Dunlap)
>> >       * get the interface changes for sharing/paging/mem-events done
>> and
>> >         dusted so that 4.2 is a stable API that we hold to. (Tim
>> Deegan,
>> >         Andres Lagar-Cavilla et al)
>> >               * mem event ring management posted, seems close to going
>> >                 in.
>> Mem event ring management has gone in, so you can chalk it off the list.
>
> Any progress on the pvops side of this? This is the -EBUSY patches
> right?

Actually, this is something quite different -- making sure that when the
hypervisor needs to kick the pager into action no events get lost.

On the pvops kernel we need to make sure backends wait for that pager to
get things right. And we halted that for a little while, after your
exchanges with Adin by the end of the year. But we'll be back with the
scheduled programming after the short break ;)

Cheers,
Andres
>