TBH this isn't about "a warning/error message to be missing" - it is a request
to add the feature to be able to "Allow creating max number of VCPUs on POWER9"
and should be declared like that.
@JFH/@Manjo - I leave it to you to discuss that and make the change.
Furthermore the patches referred are kernel only, so qemu task is
invalid and I'm adding a kernel task instead.
And finally all patches are in 4.19 upstream, so Disco is already fix-released
except for SRU considerations. Since Power9 is >=Bionic that is the max SRU
target (if any).
I'll add the bug tasks but leave it to JFH/Manjo/Kernel Team to set them to
anything but "NEW".
** Also affects: linux (Ubuntu)
Importance: Undecided
Status: New
** Also affects: qemu (Ubuntu Cosmic)
Importance: Undecided
Status: New
** Also affects: linux (Ubuntu Cosmic)
Importance: Undecided
Status: New
** Also affects: qemu (Ubuntu Bionic)
Importance: Undecided
Status: New
** Also affects: linux (Ubuntu Bionic)
Importance: Undecided
Status: New
** Changed in: linux (Ubuntu)
Status: New => Fix Released
** No longer affects: qemu (Ubuntu Bionic)
** No longer affects: qemu (Ubuntu Cosmic)
** Changed in: qemu (Ubuntu)
Status: New => Invalid
** Changed in: qemu (Ubuntu)
Assignee: Ubuntu on IBM Power Systems Bug Triage (ubuntu-power-triage) =>
(unassigned)
** Changed in: linux (Ubuntu)
Assignee: (unassigned) => Ubuntu on IBM Power Systems Bug Triage
(ubuntu-power-triage)
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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:
Triaged
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
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