Items to Merge

This a list of branches and patches which might be interesting for integration into the mainline or at least worth cherrypicking. The list is in no particular order.

• GRUB port (​lp:~bremby/grub4helenos/main)

• Task checkpointing (​lp:~tomas-brambora/helenos/checkpoint)
  • Probably hard to integrate as-is, but worth cherrypicking (e.g. restarting of syscalls)

• Statistical profiler (​lp:~ersin/helenos/measure2)
  • RTC driver, statistical profiler

• MMU-less operation (​lp:~jiri-tlach/helenos/nommu)
  • Worth integrating as-is, but a heavy maintenance burden
    • The kernel from the thesis was made fibril-aware. It was later agreed with JiriT that:

      the kernel shouldn't be fibril-aware, so rewriting it so that the fibril related info resides in uspace should be a right step.

  • Better extending to a genuine hardware platform without MMU

• NUMA support (​lp:~vojtech-horky/helenos/numa)
  • Worth integrating as-is
  • Branch is up-to-date with mainline and runs fine but following shall be implemented prior merge
    • Proper handling of memory reservations (across nodes)
    • DMA implementation

• RBAC and security (Stepan Henek)
  • Impossible to integrate as-is, but worth cherrypicking

• NICF (​lp:~helenos-nicf/helenos/nicf)
  • Some items still worth investigating/reimplementing (binary logger, DDF DMA controller interface)

• Xen support (Tomas Benhak)
  • No public repository, but worth cherrypicking
  • JJ comments:
    • workarounds for #3 no longer needed, kernel non-identity mapping available since Dec 31, 2011
    • avoids use of devman which has been officially available since March 26, 2011
    • GPL code reuse audit desirable

• HelenOS as Xen (Jan Dolejs)
  • Worth cherrypicking
  • JJ comments:
    • workarounds for #3 no longer needed, kernel non-identity mapping available since Dec 31, 2011
    • avoids using generic page table interfaces for PAE (most likely unnecessarily or requiring minor changes to the generic interface)
    • too monolithic? (doesn't seem to exploit the multiserver design for eg. the backend drivers)
    • xen awareness proliferation to generic code (elf_xen_parse_notes)
    • GPL code reuse audit desirable

• WIP: PCI and USB on PowerPC (bzr://krabicka.net/orome/helenos/usb/)
  • Worth early integration