On Thu, Aug 27, 2020 at 11:12:11AM -0700, elena.ufimts...@oracle.com wrote: > From: Elena Ufimtseva <elena.ufimts...@oracle.com> > > Hello > > This is the v9 of the patchset. Thank you very much for the > detailed feedback for v8. We appreciate your time. We believe > we have address all the comments for v8 in the current series. > Special thanks to Stefan Hajnoczi.
I think overall it's in a good shape. IIUC migration isn't supported yet so needs to be blocked. But otherwise I don't see why we won't merge this and interate on features upstream. > The v9 has the following changes: > - Communication channel. Qemu side uses blocking call to send > and receive the message from the remote and cannot progress > further until the remote side replies. Enhanced the > communication channel by dropping iothread lock before blocking > on Qemu end. Use the co-routines on the remote end to avoid > blocking QMP monitor; > - removed the heartbeat functionality, it will be added later > in a full extent; > - fixed leaked errors and similar fixes; > - eliminated bytestream passing over the channel; > - The build system had to be changed in order to accomodate the > latest changes in Qemu to use Kconfig/mason. > > To touch upon the history of this project, we posted the > Proof Of Concept patches before the BoF session in 2018. > Subsequently, we posted 8 versions on the qemu-devel mailist. > You can find them by following the links below ([1] - [8]). > > Following people contributed to the design and > implementation of this project: > Jagannathan Raman <jag.ra...@oracle.com> > Elena Ufimtseva <elena.ufimts...@oracle.com> > John G Johnson <john.g.john...@oracle.com> > Stefan Hajnoczi <stefa...@redhat.com> > Konrad Wilk <konrad.w...@oracle.com> > Kanth Ghatraju <kanth.ghatr...@oracle.com> > > We would like to thank QEMU community for your feedback in the > design and implementation of this project. > > Qemu wiki page: > https://wiki.qemu.org/Features/MultiProcessQEMU > > For the full concept writeup about QEMU multi-process, please refer to > docs/devel/qemu-multiprocess.rst. Also see docs/qemu-multiprocess.txt for > usage information. > > We welcome all your ideas, concerns, and questions for this patchset. > > [POC]: https://www.mail-archive.com/qemu-devel@nongnu.org/msg566538.html > [1]: https://www.mail-archive.com/qemu-devel@nongnu.org/msg602285.html > [2]: https://www.mail-archive.com/qemu-devel@nongnu.org/msg624877.html > [3]: https://www.mail-archive.com/qemu-devel@nongnu.org/msg642000.html > [4]: https://www.mail-archive.com/qemu-devel@nongnu.org/msg655118.html > [5]: https://www.mail-archive.com/qemu-devel@nongnu.org/msg682429.html > [6]: https://www.mail-archive.com/qemu-devel@nongnu.org/msg697484.html > [7]: https://patchew.org/QEMU/cover.1593273671.git.elena.ufimts...@oracle.com/ > [8]: https://www.mail-archive.com/qemu-devel@nongnu.org/msg727007.html > > Elena Ufimtseva (8): > multi-process: add qio channel function to transmit > multi-process: define MPQemuMsg format and transmission functions > multi-process: define transmission functions in remote > multi-process: introduce proxy object > multi-process: add proxy communication functions > multi-process: Forward PCI config space acceses to the remote process > multi-process: perform device reset in the remote process > multi-process: add configure and usage information > > Jagannathan Raman (11): > memory: alloc RAM from file at offset > multi-process: Add config option for multi-process QEMU > multi-process: setup PCI host bridge for remote device > multi-process: setup a machine object for remote device process > multi-process: Initialize message handler in remote device > multi-process: Associate fd of a PCIDevice with its object > multi-process: setup memory manager for remote device > multi-process: PCI BAR read/write handling for proxy & remote > endpoints > multi-process: Synchronize remote memory > multi-process: create IOHUB object to handle irq > multi-process: Retrieve PCI info from remote process > > John G Johnson (1): > multi-process: add the concept description to > docs/devel/qemu-multiprocess > > MAINTAINERS | 26 + > backends/hostmem-memfd.c | 2 +- > configure | 10 + > docs/devel/index.rst | 1 + > docs/devel/multi-process.rst | 966 ++++++++++++++++++++++++++++++++ > docs/multi-process.rst | 67 +++ > exec.c | 11 +- > hw/i386/meson.build | 5 + > hw/i386/remote-iohub.c | 123 ++++ > hw/i386/remote-memory.c | 58 ++ > hw/i386/remote-msg.c | 263 +++++++++ > hw/i386/remote-obj.c | 140 +++++ > hw/i386/remote.c | 79 +++ > hw/misc/ivshmem.c | 3 +- > hw/pci-host/meson.build | 1 + > hw/pci-host/remote.c | 75 +++ > hw/pci/memory-sync.c | 210 +++++++ > hw/pci/meson.build | 3 + > hw/pci/proxy.c | 363 ++++++++++++ > include/exec/memory.h | 2 + > include/exec/ram_addr.h | 2 +- > include/hw/i386/remote-iohub.h | 42 ++ > include/hw/i386/remote-memory.h | 19 + > include/hw/i386/remote-obj.h | 42 ++ > include/hw/i386/remote.h | 35 ++ > include/hw/pci-host/remote.h | 31 + > include/hw/pci/memory-sync.h | 27 + > include/hw/pci/pci_ids.h | 3 + > include/hw/pci/proxy.h | 54 ++ > include/io/channel.h | 24 + > include/io/mpqemu-link.h | 110 ++++ > include/qemu/mmap-alloc.h | 3 +- > io/channel.c | 45 ++ > io/meson.build | 2 + > io/mpqemu-link.c | 347 ++++++++++++ > meson.build | 1 + > scripts/mpqemu-launcher.py | 49 ++ > softmmu/memory.c | 3 +- > util/mmap-alloc.c | 7 +- > util/oslib-posix.c | 2 +- > 40 files changed, 3243 insertions(+), 13 deletions(-) > create mode 100644 docs/devel/multi-process.rst > create mode 100644 docs/multi-process.rst > create mode 100644 hw/i386/remote-iohub.c > create mode 100644 hw/i386/remote-memory.c > create mode 100644 hw/i386/remote-msg.c > create mode 100644 hw/i386/remote-obj.c > create mode 100644 hw/i386/remote.c > create mode 100644 hw/pci-host/remote.c > create mode 100644 hw/pci/memory-sync.c > create mode 100644 hw/pci/proxy.c > create mode 100644 include/hw/i386/remote-iohub.h > create mode 100644 include/hw/i386/remote-memory.h > create mode 100644 include/hw/i386/remote-obj.h > create mode 100644 include/hw/i386/remote.h > create mode 100644 include/hw/pci-host/remote.h > create mode 100644 include/hw/pci/memory-sync.h > create mode 100644 include/hw/pci/proxy.h > create mode 100644 include/io/mpqemu-link.h > create mode 100644 io/mpqemu-link.c > create mode 100755 scripts/mpqemu-launcher.py > > -- > 2.25.GIT
