Public bug reported: == Comment: #0 - HARIHARAN T. SUNDARESH REDDY <harih...@in.ibm.com> - 2018-10-03 01:29:59 == Description : Hotplug is supported only for 64 dimms and the same is controlled by the sysfs parameter
# cat /sys/module/vhost/parameters/max_mem_regions 64 However qemu supports 256 slots max. In my opinion max_mem_regions must be >= 256. log : 63 Device attached successfully <--- 63 times devices attached successfully, later all attach failed. 64 error: Failed to attach device from hp_mem.xml error: internal error: unable to execute QEMU command 'device_add': a used vhost backend has no free memory slots left 65 error: Failed to attach device from hp_mem.xml error: internal error: unable to execute QEMU command 'device_add': a used vhost backend has no free memory slots left 66 error: Failed to attach device from hp_mem.xml error: internal error: unable to execute QEMU command 'device_add': a used vhost backend has no free memory slots left System Details : uname -a Linux ltc-fvttest 4.18.5-custom #1 SMP Wed Sep 26 12:11:51 CDT 2018 ppc64le ppc64le ppc64le GNU/Linux root@ltc-fvttest:/home/hariharan# cat /etc/os-release NAME="Ubuntu" VERSION="18.10 (Cosmic Cuttlefish)" ID=ubuntu ID_LIKE=debian PRETTY_NAME="Ubuntu Cosmic Cuttlefish (development branch)" VERSION_ID="18.10" HOME_URL="https://www.ubuntu.com/"; SUPPORT_URL="https://help.ubuntu.com/"; BUG_REPORT_URL="https://bugs.launchpad.net/ubuntu/"; PRIVACY_POLICY_URL="https://www.ubuntu.com/legal/terms-and-policies/privacy-policy"; VERSION_CODENAME=cosmic UBUNTU_CODENAME=cosmic ** Affects: sysfsutils (Ubuntu) Importance: Undecided Assignee: Ubuntu on IBM Power Systems Bug Triage (ubuntu-power-triage) Status: New ** Tags: architecture-ppc64le bugnameltc-171919 severity-medium targetmilestone-inin--- ** Tags added: architecture-ppc64le bugnameltc-171919 severity-medium targetmilestone-inin--- ** Changed in: ubuntu Assignee: (unassigned) => Ubuntu on IBM Power Systems Bug Triage (ubuntu-power-triage) ** Package changed: ubuntu => sysfsutils (Ubuntu) -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1796839 Title: Only 64 Memory regions or dimms supported for Hotplug. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/sysfsutils/+bug/1796839/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
