** Tags removed: severity-high ** Tags added: severity-medium -- 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/1817832
Title: qemu crashes with `kvm_init_vcpu failed: Invalid argument` during guest boot cores >256 Status in The Ubuntu-power-systems project: Incomplete Status in linux package in Ubuntu: Fix Released Status in qemu package in Ubuntu: Invalid Status in linux source package in Bionic: New Status in linux source package in Cosmic: New Bug description: == Comment: #0 - Satheesh Rajendran <sathe...@in.ibm.com> - 2019-02-14 23:48:15 == ---Problem Description--- qemu crashes with `kvm_init_vcpu failed: Invalid argument` during guest boot cores >256 but the error message is not clearly explains it. Contact Information = sathe...@in.ibm.com ---uname output--- 4.15.0-1016-ibm-gt Machine Type = power9 ppc64le ---Debugger--- A debugger is not configured ---Steps to Reproduce--- # /usr/bin/qemu-system-ppc64 -smp 257 -enable-kvm -monitor stdio qemu-system-ppc64: warning: Number of SMP cpus requested (257) exceeds the recommended cpus supported by KVM (128) qemu-system-ppc64: warning: Number of hotpluggable cpus requested (257) exceeds the recommended cpus supported by KVM (128) QEMU 2.11.1 monitor - type 'help' for more information (qemu) kvm_init_vcpu failed: Invalid argument Expected Result: 1. Guest should boot fine or 2. Proper error message stating cores >256 need to have thread>1 because smp=512 with threads=2 works fine like below # /usr/bin/qemu-system-ppc64 -smp 512,cores=256,threads=2 -enable-kvm -monitor stdio qemu-system-ppc64: warning: Number of SMP cpus requested (512) exceeds the recommended cpus supported by KVM (128) qemu-system-ppc64: warning: Number of hotpluggable cpus requested (512) exceeds the recommended cpus supported by KVM (128) QEMU 2.11.1 monitor - type 'help' for more information (qemu) VNC server running on ::1:5900 (qemu) info status VM status: running Userspace tool common name: ii qemu-system-ppc 1:2.11+dfsg-1ubuntu7.8-1ibm3 ppc64el QEMU full system emulation binaries (ppc) The userspace tool has the following bit modes: both Userspace rpm: ii qemu-system-ppc 1:2.11+dfsg-1ubuntu7.8-1ibm3 ppc64el QEMU full system emulation binaries (ppc) Userspace tool obtained from project website: na *Additional Instructions for sathe...@in.ibm.com: -Post a private note with access information to the machine that the bug is occuring on. -Attach ltrace and strace of userspace application. commit 1e175d2e07c71d9574f5b1c74523abca54e2654f Author: Sam Bobroff <sam.bobr...@au1.ibm.com> Date: Wed Jul 25 16:12:02 2018 +1000 commit b5c6f7607b908b1445f2556c8d2f3b1ec5fc5aa8 Author: Paul Mackerras <pau...@ozlabs.org> Date: Thu Jul 26 15:38:41 2018 +1000 commit 1ebe6b81ebdba8faf377d1d7d84ad9368e7a0bae Author: Paul Mackerras <pau...@ozlabs.org> Date: Thu Jul 26 14:53:54 2018 +1000 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu-power-systems/+bug/1817832/+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
