I have tested the kernel provided with commit ef754413085f5 and the bug persists. The daemons do not stop if the integration services are being disabled.
The kernel provided in comment #36 was not affected by the bug. That was the first good commit. Regarding comment #27, the kernel tested was reported as bad (the daemon still remains running after the integration service is being disabled). Just to make sure we got this right, there are 2 issues right now: 1. The daemons do not stop if the integration service is being disabled, they remain running in the process list, but are not functional. This issue is present in the kernels tested up to 4.4.0-2. This issue is NOT present in kernel 4.4.0-3, here the daemons processes do stop if the integration service is disabled. Regarding this issue, the kernel provided in comment #36 is a good kernel. 2. The daemons do not automatically start after the integration service is disabled and then enabled again. This is the initial bug discovered in 16.04 and 17.04. Kernel 4.4.0-3 does not have the first issue, but it has the second one. -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1701222 Title: [Hyper-V] LIS daemons fail to start after disable/re-enable VM integration services Status in linux package in Ubuntu: In Progress Status in linux source package in Xenial: In Progress Status in linux source package in Zesty: In Progress Bug description: Issue description: Hyper-V daemons fail to start after disable/re- enable VM integration services. Platform: host independent Affected daemons - KVP, FCOPY and VSS. Distribution name and release: Ubuntu 16.04, Ubuntu 17.04 Kernel version: 4.11.0-rc7-next-20170421 (for Ubuntu 16.04), 4.10.0-19-generic (for Ubuntu 17.04) Repro rate: 100% Steps to reproduce: 1. Start VM with Guest Services enabled (FCopy daemon starts automatically) 2. Go to File > Settings > Integration Services, uncheck Guest Services and apply (FCopy daemon will stop at this point) 3. Re-enable Guest Services from VM Settings (Fcopy daemon is not running). This is the issue. systemd monitors for the service and if we have the hook for the Guest Service, it tries to start the daemon again. systemd attempt to start any of the LIS daemons will fail, but manually executing the daemon binary, it will start the daemon. Additional Info: - the steps above can be repro'd with KVP / Data Exchange integration service as well. - Manually starting hv_fcopy_daemon works fine. - other distros (RHEL) does not have this behavior, the LIS daemons are started automatically by systemd once we re-enable the integration service. On the upstream kernel and the upstream hv daemons, these messages are recorded in syslog, once we re-enable the Guest service: HV_FCOPY: pread failed: Bad file descriptor systemd[1]: hv-fcopy-daemon.service: Main process exited, code=exited, status=1/FAILURE systemd[1]: hv-fcopy-daemon.service: Unit entered failed state. systemd[1]: hv-fcopy-daemon.service: Failed with result 'exit-code'. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1701222/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp
