Re: [Xen-devel] Xen 4.2 TODO List Update

[Roger Pau Monnà <roger.pau@xxxxxxxxxxxxx>]

2012/1/25 Ian Campbell <Ian.Campbell@xxxxxxxxxx>:
> On Wed, 2012-01-25 at 14:49 +0000, Roger Pau Monnà wrote:
>> 2012/1/25 Ian Campbell <Ian.Campbell@xxxxxxxxxx>:
>> > On Wed, 2012-01-25 at 14:33 +0000, Roger Pau Monnà wrote:
>> >> 2012/1/23 Ian Campbell <Ian.Campbell@xxxxxxxxxx>:
>> >> > 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:
>> >> >
>> >> > Â Â Â* round-up of the closing of the security hole in MSI-X
>> >> > Â Â Â Âpassthrough (uniformly - i.e. even for Dom0 - disallowing write
>> >> > Â Â Â Âaccess to MSI-X table pages). (Jan Beulich -- more fixes
>> >> > Â Â Â Ârequired than first thought, patches posted)
>> >> > Â Â Â* domctls / sysctls set up to modify scheduler parameters, like
>> >> > Â Â Â Âthe credit1 timeslice and schedule rate. (George Dunlap)
>> >> > Â Â Â* get the interface changes for sharing/paging/mem-events done and
>> >> > Â Â Â Âdusted so that 4.2 is a stable API that we hold to. (Tim Deegan,
>> >> > Â Â Â ÂAndres Lagar-Cavilla et al)
>> >> > Â Â Â Â Â Â Â* mem event ring management posted, seems close to going
>> >> > Â Â Â Â Â Â Â Âin.
>> >> > Â Â Â Â Â Â Â* sharing patches posted
>> >> >
>> >> > tools, blockers:
>> >> >
>> >> > Â Â Â* libxl stable API -- we would like 4.2 to define a stable API
>> >> > Â Â Â Âwhich downstream's can start to rely on not changing. Aspects of
>> >> > Â Â Â Âthis are:
>> >> > Â Â Â Â Â Â Â* event handling (Ian Jackson, posted several rounds,
>> >> > Â Â Â Â Â Â Â Ânearing completion?)
>> >> > Â Â Â Â Â Â Â* drop libxl_device_model_info (move bits to build_info or
>> >> > Â Â Â Â Â Â Â Âelsewhere as appropriate) (Ian Campbell, first RFC sent)
>> >> > Â Â Â Â Â Â Â* add libxl_defbool and generally try and arrange that
>> >> > Â Â Â Â Â Â Â Âmemset(foo,0,...) requests the defaults (Ian Campbell,
>> >> > Â Â Â Â Â Â Â Âfirst RFC sent)
>> >> > Â Â Â Â Â Â Â* topologyinfo datastructure should be a list of tuples,
>> >> > Â Â Â Â Â Â Â Ânot a tuple of lists. (nobody currently looking at this,
>> >> > Â Â Â Â Â Â Â Ânot 100% sure this makes sense, could possibly defer and
>> >> > Â Â Â Â Â Â Â Âchange after 4.2 in a compatible way)
>> >> > Â Â Â* xl to use json for machine readable output instead of sexp by
>> >> > Â Â Â Âdefault (Ian Campbell to revisit existing patch)
>> >> > Â Â Â* xl support for vcpu pinning (Dario Faggioli)
>> >> > Â Â Â* xl feature parity with xend wrt driver domain support (George
>> >> > Â Â Â ÂDunlap)
>> >> > Â Â Â* Integrate qemu+seabios upstream into the build (patches
>> >> > Â Â Â Âreposted, pending). No change in default qemu for 4.2.
>> >> > Â Â Â* More formally deprecate xm/xend. Manpage patches already in
>> >> > Â Â Â Âtree. Needs release noting and communication around -rc1 to
>> >> > Â Â Â Âremind people to test xl.
>> >> >
>> >> > hypervisor, nice to have:
>> >> >
>> >> > Â Â Â* solid implementation of sharing/paging/mem-events (using work
>> >> > Â Â Â Âqueues) (Tim Deegan, Olaf Herring et al)
>> >> > Â Â Â* A long standing issue is a fully synchronized p2m (locking
>> >> > Â Â Â Âlookups) (Andres Lagar-Cavilla)
>> >> > Â Â Â* NUMA improvement: domain affinity consistent with cpupool
>> >> > Â Â Â Âmembership (Dario Faggioli, Jeurgen Gross -- patch posted)
>> >> >
>> >> > tools, nice to have:
>> >> >
>> >> > Â Â Â* Hotplug script stuff -- internal to libxl (I think, therefore I
>> >> > Â Â Â Âdidn't put this under stable API above) but still good to have
>> >> > Â Â Â Âfor 4.2? Roger Pau Monet was looking at this but its looking
>> >> > Â Â Â Âlike a big can-o-worms. (discussion on-going)
>> >> > Â Â Â* Block script support -- follows on from hotplug script (Roger
>> >> > Â Â Â ÂPau Monet)
>> >> > Â Â Â* libyajl v2 support (patch posted by Roger Pau Monet, blocked on
>> >> > Â Â Â Âautoconf?)
>> >> > Â Â Â* Configure/control paging via xl/libxl (Olaf Herring)
>> >> > Â Â Â* Upstream qemu feature patches:
>> >> > Â Â Â Â Â Â Â* Upstream qemu PCI passthrough support (Anthony Perard)
>> >> > Â Â Â Â Â Â Â* Upstream qemu save restore (Anthony Perard)
>> >> > Â Â Â* Nested-virtualisation (currently should be marked
>> >> > Â Â Â Âexperimental,likely to release that way? Consider nested-svm
>> >> > Â Â Â Âseparate 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.
>> >
>> > "make -C docs man-pages" will do what you want.
>>
>> Thanks, I've already done this to build them on my system, but I think
>> we should provide some easy way for users without latex to build and
>> install the man pages.
>
> It's hard to get much easier, but...
>
>> > I must admit I thought latex was optional and that "make docs" would
>> > simply skip those docs if it wasn't installed -- that's what the "if
>> > which $(TOOL)" construct used in there is (supposed to be) doing.
>>
>> If latex is not found, the compilation is aborted:
>>
>> # make docs
>> sh ./docs/check_pkgs && make -C docs install || true
>> =================================================
>> =================================================
>> = WARNING: Package 'latex' is required
>> = Â Â Â Â Âto build Xen documentation
>> =================================================
>> =================================================
>>
>> I think make docs should just skip latex if not found.
>
> Looks like it is simply the check which is too strict. AFAICT the actual
> docs build already skips those docs if you don't have Latex. You can
> test this with "make -C docs" which is basically the same as "make docs"
> but without the checks.

I'm not really sure latex is skipped if not found:

# make -C docs
make: Entering directory `/root/xen-work/docs'
latex src/user.tex >/dev/null
/bin/sh: latex: not found
make: *** [user.dvi] Error 127
make: Leaving directory `/root/xen-work/docs'

Either we remove the latex docs or we add some checks to skip the
sections that require latex.

>
> Ian.
>
>

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