Re: Xen 4.2 TODO List Update

["Roger Pau Monné" <roger.pau@entel.upc.edu>]

2012/1/23 Ian Campbell <Ian.Campbell@citrix.com>:
> 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)
>
> 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)


Just a random thought, but I find it quite annoying to need latex to
compile the documentation. I think it will be wise to create a new
Makefile target, like man-pages and install-man-pages to allow the
user to build and install man pages only (or don't abort docs build if
latex is not found). Personally I don't have latex on my server, and I
don't want to install it, but I would like to have the man pages when
building Xen from source.

> Tools, need to decide if pre- or post-4.2 feature:
>
>      * Autoconf (Roger Pau Monet posted a patch)
>
>
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