Libguestfs - Mar 2018 - Re: Issue with libguestfs-test-tool on a guest hosted on VMWare ESXi

Thanks. Reading the defect and the associated thread in
https://bugs.launchpad.net/qemu/+bug/1661386, I enabled performance
counters in VMWare guest settings. Now the kvm assertion `ret
=cpu->kvm_msr_buf->nmsrs'  is gone. But the qemu/kvm hangs after
printing
"SeaBIOS (version 1.10.2-1)"

I presume this too is a qemu/kvm issue for vmware platforms. Is there any
existing issue reported?


Regards,
Tanmoy Sinha

============================================
libguestfs: command: run: \ --verbose

libguestfs: command: run: \ --if-newer

libguestfs: command: run: \ --lock /var/tmp/.guestfs-0/lock

libguestfs: command: run: \ --copy-kernel

libguestfs: command: run: \ -f ext2

libguestfs: command: run: \ --host-cpu x86_64

libguestfs: command: run: \ /usr/lib/x86_64-linux-gnu/guestfs/supermin.d

libguestfs: command: run: \ -o /var/tmp/.guestfs-0/appliance.d

supermin: version: 5.1.17

supermin: package handler: debian/dpkg

supermin: acquiring lock on /var/tmp/.guestfs-0/lock

supermin: if-newer: output does not need rebuilding

libguestfs: finished building supermin appliance

libguestfs: begin testing qemu features

libguestfs: checking for previously cached test results of
/usr/bin/qemu-system-x86_64, in /var/tmp/.guestfs-0

libguestfs: loading previously cached test results

libguestfs: qemu version 2.8

libguestfs: finished testing qemu features

[00012ms] /usr/bin/qemu-system-x86_64 \

    -global virtio-blk-pci.scsi=off \

    -nodefconfig \

    -enable-fips \

    -nodefaults \

    -display none \

    -machine accel=kvm:tcg \

    -cpu host \

    -m 500 \

    -no-reboot \

    -rtc driftfix=slew \

    -no-hpet \

    -global kvm-pit.lost_tick_policy=discard \

    -kernel /var/tmp/.guestfs-0/appliance.d/kernel \

    -initrd /var/tmp/.guestfs-0/appliance.d/initrd \

    -object rng-random,filename=/dev/urandom,id=rng0 \

    -device virtio-rng-pci,rng=rng0 \

    -device virtio-scsi-pci,id=scsi \

    -drive
file=/tmp/libguestfswJEdlG/scratch.1,cache=unsafe,format=raw,id=hd0,if=none
\

    -device scsi-hd,drive=hd0 \

    -drive
file=/var/tmp/.guestfs-0/appliance.d/root,snapshot=on,id=appliance,cache=unsafe,if=none,format=raw
\

    -device scsi-hd,drive=appliance \

    -device virtio-serial-pci \

    -serial stdio \

    -device sga \

    -chardev socket,path=/tmp/libguestfsj95RNX/guestfsd.sock,id=channel0 \

    -device virtserialport,chardev=channel0,name=org.libguestfs.channel.0 \

    -append 'panic=1 console=ttyS0 edd=off udevtimeout=6000
udev.event-timeout=6000 no_timer_check printk.time=1 cgroup_disable=memory
usbcore.nousb cryptomgr.notests tsc=reliable 8250.nr_uarts=1 root=/dev/sdb
selinux=0 guestfs_verbose=1 TERM=screen'

libguestfs: responding to serial console Device Status Report

\x1b[1;256r\x1b[256;256H\x1b[6n

Google, Inc.

Serial Graphics Adapter 12/07/13

SGABIOS $Id: sgabios.S 8 2010-04-22 00:03:40Z nlaredo $ (mjt@gandalf) Sat
Dec  7 15:39:53 UTC 2013

Term: 80x24

4 0

SeaBIOS (version 1.10.2-1)


On Fri, 23 Mar 2018 at 14:37 Pino Toscano <ptoscano@redhat.com> wrote:
> On Friday, 23 March 2018 07:10:00 CET Tanmoy Sinha wrote:
> > I am using a debian 9 guest, hosted on a ESXi platform with nested
> > virtualisation enabled.
> >
> > On this debian 9 guest when I run libguesfs-test-tool, it fails with
an
> > error:
> >
> >  "qemu-system-x86_64:
> > /build/qemu-DqynNa/qemu-2.8+dfsg/target-i386/kvm.c:1805: kvm_put_msrs:
> > Assertion `ret == cpu->kvm_msr_buf->nmsrs' failed."
>
> See also https://bugzilla.redhat.com/show_bug.cgi?id=1456407
> This is basically a bug in VMware and the qemu bug
> https://bugs.launchpad.net/qemu/+bug/1661386
> has a couple of hints about what it can be changed in VMware to avoid
> this situation.
>
> --
> Pino Toscano

On Fri, Mar 23, 2018 at 05:35:38PM +0000, Tanmoy Sinha
wrote:
> Thanks. Reading the defect and the associated thread in
> https://bugs.launchpad.net/qemu/+bug/1661386, I enabled performance
> counters in VMWare guest settings. Now the kvm assertion `ret =>
cpu->kvm_msr_buf->nmsrs'  is gone. But the qemu/kvm hangs after
printing
> "SeaBIOS (version 1.10.2-1)"
> 
> I presume this too is a qemu/kvm issue for vmware platforms. Is there any
> existing issue reported?
Does it work if you set:

  export LIBGUESTFS_BACKEND_SETTINGS=force_tcg

?

Rich.

-- 
Richard Jones, Virtualization Group, Red Hat http://people.redhat.com/~rjones
Read my programming and virtualization blog: http://rwmj.wordpress.com
virt-builder quickly builds VMs from scratch
http://libguestfs.org/virt-builder.1.html

Yes it works if I use force_tcg env variable

On Sat, 24 Mar 2018 at 4:37 AM, Richard W.M. Jones <rjones@redhat.com>
wrote:
>
> On Fri, Mar 23, 2018 at 05:35:38PM +0000, Tanmoy Sinha wrote:
> > Thanks. Reading the defect and the associated thread in
> > https://bugs.launchpad.net/qemu/+bug/1661386, I enabled performance
> > counters in VMWare guest settings. Now the kvm assertion `ret =>
> cpu->kvm_msr_buf->nmsrs'  is gone. But the qemu/kvm hangs after
printing
> > "SeaBIOS (version 1.10.2-1)"
> >
> > I presume this too is a qemu/kvm issue for vmware platforms. Is there
any
> > existing issue reported?
>
> Does it work if you set:
>
>   export LIBGUESTFS_BACKEND_SETTINGS=force_tcg
>
> ?
>
> Rich.
>
> --
> Richard Jones, Virtualization Group, Red Hat
> http://people.redhat.com/~rjones
> Read my programming and virtualization blog: http://rwmj.wordpress.com
> virt-builder quickly builds VMs from scratch
> http://libguestfs.org/virt-builder.1.html
>