Hello Dongli, Elena, John, and Jagannathan, I'm interested in the "multi-process QEMU" feature and got the kind reply by Mr. Vivier that I may contact you for this. On one of the QEMU docs [1] I saw the command line:
+ /usr/bin/qemu-system-x86_64 \ + -machine x-remote \ + -device lsi53c895a,id=lsi0 \ + -drive id=drive_image2,file=/build/ol7-nvme-test-1.qcow2 \ + -device scsi-hd,id=drive2,drive=drive_image2,bus=lsi0.0,scsi-id=0 \ + -object x-remote-object,id=robj1,devid=lsi1,fd=4, It seems that the man page of qemu contains no parameter and option yet for this feature. The qemu docs, such as [2][3][4] are either not up-to-date or "doesn't reflect the current status of the implementation". So may I know whether is it still in experimental stage or mature enough for use? And even a few further questions: - When creating the orchestrator, can we specify a machine type such as pc-i440fx-7.0 for -machine? - Can each device has a dedicated emulation process or shares one process for emulating multiple devices? - Can we find more command line examples showing the combination of orchestrator, remote emulation process, memory-backend-memfd and x-pci-proxy-dev? Thank you very much and all the best Yu Zhang 03.06.2022 [1] https://www.qemu.org/docs/master/system/multi-process.html [2] https://wiki.qemu.org/Features/MultiProcessQEMU [3] https://lxr.missinglinkelectronics.com/qemu+v7.0.0/docs/devel/multi-process.rst [4] https://qemu.readthedocs.io/en/latest/devel/multi-process.html ---------- Forwarded message --------- From: Laurent Vivier <laur...@vivier.eu> Date: Fri, Jun 3, 2022 at 4:14 PM Subject: Re: about the current status of Multi-process QEMU / out-of-process emulation To: Yu Zhang <yu.zh...@ionos.com> Hi Yu, I'm not the author of this documentation, only the person that has merged the last change in the repo. According to the logs you should contact Dongli Zhang < dongli.zh...@oracle.com>, Elena Ufimtseva <elena.ufimts...@oracle.com>, John G Johnson <john.g.john...@oracle.com> or Jagannathan Raman <jag.ra...@oracle.com> . Thanks, Laurent Le 03/06/2022 à 12:17, Yu Zhang a écrit : > Dear Mr. Vivier, > > I saw that you authored the QEMU page for "Multi-process QEMU". > (https://www.qemu.org/docs/master/system/multi-process.html > <https://www.qemu.org/docs/master/system/multi-process.html>) > > I'm interested in this feature, but feel a little confused with the command line: > > + /usr/bin/qemu-system-x86_64 \ > + -machine x-remote \ > + -device lsi53c895a,id=lsi0 \ > + -drive id=drive_image2,file=/build/ol7-nvme-test-1.qcow2 \ > + -device scsi-hd,id=drive2,drive=drive_image2,bus=lsi0.0,scsi-id=0 \ > + -object x-remote-object,id=robj1,devid=lsi1,fd=4, > > It seems that the man page of qemu command contains no parameter and option yet for this feature. > May I know whether is it still in experimental stage? And even a few more questions: > > - Is "x-remote" a standalone machine type for creating the orchestrator? > - Can each device has a dedicated emulation process or shares one process for emulating multiple > devices? > - Can I find more command line examples illustrating the combination of orchestrator, remote > emulation process, memory-backend-memfd and x-pci-proxy-dev? > > Thank you very much > Kind regard > > Yu Zhang > 03.06.2022
