Re: Xen 4.2 TODO List Update

[Juergen Gross <juergen.gross@ts.fujitsu.com>]

On 01/23/2012 02:19 PM, Ian Campbell wrote:
> 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.
>                * sharing patches posted
>
> 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)

Patches accepted (cs24549..24551)

> 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)
>
>
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>


-- 
Juergen Gross                 Principal Developer Operating Systems
PDG ES&S SWE OS6                       Telephone: +49 (0) 89 3222 2967
Fujitsu Technology Solutions              e-mail: juergen.gross@ts.fujitsu.com
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