Xen Development

Help us focus our efforts on Xen development! Please suggest things you think would make the Xen project more useful. More importantly, rate the improvements you think are the most important.

Suggestions can involve the core Xen tree, or in Linux or qemu. Due to demand, we’ve asked some members of the XCP team to get involved too; if your request is for XCP (as opposed to the core Xen project), then please prefix your request with “XCP:”, so that the right person knows to look at it.

Be sure to describe primarily what problem you’re trying to solve. That will help us determine what the best technical solution is. It may even be that there already is a solution we can suggest you use.

Responses mean:

  • Under review: It’s on our radar, but no one has said they are working on it for a specific release
  • Planned: Someone has said they are working on it for a particular release
  • Started: Someone has started the code
  • Completed: The code is done, and should be available in the next release (if it’s not available already)

I suggest you ...

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  1. 1 vote
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    • Will xen-4.5 support nfs root filesystem with Xl toolstack?

      With xen-4.4, it is said once can use nfs_root for nfs root filesystems.
      After testing with xl, it appears to be buggy.
      Will xen-4.5 will support this feature?

      1 vote
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      • Could you tell me which daemons I have to authorize in hosts.allow in order to start xcp-xapi?

        Xcp-xapi uses rcp.
        So I have to configure hosts.allow and hosts.deny for portmap.
        Could you tell me which daemons I have to authorize for dom0 in hosts.allow in order to start xcp-xapi?

        1 vote
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        • Does License fee is needed to use XEN of ARMv7?

          Hi,

          I want to port Xen Hypervisor on Freescale i.mx6 of ARM Cortex A9. Could you let me know any License fee is needed to use it commercially?

          Thanks,

          1 vote
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          • xen support multiple vnc client connecting?

            I open one vnc viewer to connect the xen virtual machines,that works right. At the same time, I open another vnc viewer to connect the same virtual machines, the vnc viewer cann't connect. The status is always be " Connecting....". As far as I know, the reason for that is Xen can not support multiple vnc client connect the same virtual machine at the same time. If anyone has the same problem? How to fix this? Expecting your answer.

            7 votes
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              1 comment  ·  Admin →
            • EHCI / XHCI Emulation in HVM Guest

              Hi,

              I have been using xen 4.4 to emulate EHCI/XHCI in Ubuntu HVM Guest. I have specified usbviersion 2 for EHCI in HVM config file.
              However, I am unable to see UHCI / EHCI emulated controller in HVM Guest. If I do not specify usbversion in HVM then I can see UHCI emulated controller present in HVM Guest.

              Is this a limitation of Xen 4.4? Xen 4.5 will come up with complete Emulation of EHCI / XHCI? If yes, then May I know tentative date of Xen 4.5 Release?

              As I have to run multiple HVM Guest OSs with EHCI…

              1 vote
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                1 comment  ·  Admin →
              • Reopen and maintain a public bug tracker and tie it into regression testing.

                The xen.org bugtracker fell out of grace almost a dozen years now.
                It would be good to have one and integrate it in the Xen release management.

                Otherwise many more people aren't just affected by bugs or other issues, but they also all need to spend time discovering / debugging and researching it.
                Using a "lively" bug tracker would also allow to verify if a problem is fixed.

                32 votes
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                • QXL/SPICE Give users what commands to apply your patch for libxl v16 please fabio fantoni

                  I'm triying to make a good configuration of xen.

                  Trying to add the QXL function, I don't understand how to do it...

                  Please explain a little bit and use if possible absolute path and show which command to tape in order to do it runs.

                  xen 4.4, qemu-upstream-unstable-779640a

                  in vm configuration : vga= "qxl"

                  returns at xl create :

                  Unknown vga "qxl" specified

                  I've followed this page, but don't understand how to patch :

                  http://lists.xen.org/archives/html/xen-devel/2014-05/msg03214.html

                  1 vote
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                    1 comment  ·  Admin →
                  • Dynamic LUN growth

                    Provide the ability to dynamically grow a LUN without requiring VMs on the associated storage repository to be restarted.

                    4 votes
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                    • Thin provisiong lvm over iscsi/hba

                      Support Thin provisiong lvm over iscsi/hba

                      2 votes
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                      • XenServer - Check for free space before snapshot-actions

                        As several times reported on the citrix forum:
                        http://discussions.citrix.com/topic/293667-original-vdi-unavailable-after-revert-snapshot-failed/
                        Whatever happened, but XenServer should take care of enough free space before doing anything.
                        It must not happen, that something is deleted and unbootable if it could be prevented by simplest checks.

                        Regards
                        - Christof

                        6 votes
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                        • 22 votes
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                          • 1 vote
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                            • New network adapter emulation: replace the Realtek 100Mbit adapter by a 1Gbit adapter

                              One of the most annoying things about the Realtek adapter is that if you need to restore a VM, using tools like Appassure Replay, Acronis, .... the bootable Recovery media of course only detects the good old Reaktek 100MB adapter and restoring a large system, over a 100MB line takes forever. Using a 1GB adapter would speed up thing considerably. e.g. E1000 (like VMWare) it would also speed up system deployments using Microsoft WDS.

                              11 votes
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                              • XenServer - support for standard T10 SCSI commands - storage array integration

                                inclusion of standard t10 SCSI commands would make huge differences if they were included in the iSCSI initiator

                                Thus Xen would have "hardware accelerated" storage on any VAAI approved storage appliances or LIO/QuadStor installations.

                                We have seen massive improvements in snapshot, cloning times etc from these commands - and is the only reason we aren't moving to Xen from VMWare.

                                20 votes
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                                • XenServer: Add --with-usb to kernels... since SD Flash for hard drives is becoming more mainstream.

                                  We have all in-house production servers with NO LOCAL HARD DRIVES. The OS is on SD Flash cards (2) RAID. Evertime there is a kernel upgrade I have to boot from CD, initrd --with-usb a the new kernel before I can boot up my server!!!!

                                  7 votes
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                                  • Add Remote Replication

                                    Add a mechanism to remotely replicate the vm's without the use of external storage. This is a major need for smaller deployments.

                                    20 votes
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                                      1 comment  ·  Admin →
                                    • Fix Self-Fencing in a 2-Server HA XCP Pool

                                      A two-server pool of servers with high availability configured and enabled will sometimes result in a server self-fencing in the event of one of the hosts failing. The code should be robust enough to resolve this issue and avoid this situation. It should not be mandatory to have at lest three servers in a pool for high-availability to work properly.

                                      39 votes
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                                      • mroelectric

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                                        1 vote
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                                        • support for HVM Dom0 -

                                          proposed by Intel team - Will Auld etc..al at XPDS2013

                                          http://www.xenproject.org/component/allvideoshare/video/latest/xpds13-hvm-dom0.html

                                          call for progressing from the current PV Dom0 kernel to an unmodified HVM Dom0
                                          improve Dom0 performance, fully leverage the Virtualization tech (VT)

                                          1 vote
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