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Tanmoy Sinha

2018-Mar-23 06:10 UTC

[Libguestfs] Issue with libguestfs-test-tool on a guest hosted on VMWare ESXi

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."

Instead when I use a wrapper script and hook it with the env
variable LIBGUESTFS_HV=/tmp/qemu.wrapper, things work fine, as in the
script I just spawn the guest with the specific machine type pc-i440fx-2.1
over KVM.

exec qemu-system-x86_64 -enable-kvm -machine *pc-i440fx-2.**1*,accel
=kvm,dump-guest-core=off "${args[@]}"


The script is attached as well as the libguestfs-test-tool logs.


Can anybody help me on this. Why is the latest machine type, i.e.
pc-i440fx-2.8  on my debian 9 guest not working out? If I do a force_tcg it
works even with the latest machine type, but that is not what I desire, I
don't intend libguestfs to run on emulation.


========================================================================================================================

System configuration:

*$> uname -a*

Linux XXXX 4.9.0-6-amd64 #1 SMP Debian 4.9.82-1+deb9u3 (2018-03-02) x86_64
GNU/Linux


*$>  kvm -machine help*

Supported machines are:

pc                   Standard PC (i440FX + PIIX, 1996) (alias of
pc-i440fx-2.8)

pc-i440fx-2.8        Standard PC (i440FX + PIIX, 1996) (default)

pc-i440fx-2.7        Standard PC (i440FX + PIIX, 1996)

pc-i440fx-2.6        Standard PC (i440FX + PIIX, 1996)

pc-i440fx-2.5        Standard PC (i440FX + PIIX, 1996)

pc-i440fx-2.4        Standard PC (i440FX + PIIX, 1996)

pc-i440fx-2.3        Standard PC (i440FX + PIIX, 1996)

pc-i440fx-2.2        Standard PC (i440FX + PIIX, 1996)

pc-i440fx-2.1        Standard PC (i440FX + PIIX, 1996)

pc-i440fx-2.0        Standard PC (i440FX + PIIX, 1996)

pc-i440fx-1.7        Standard PC (i440FX + PIIX, 1996)

pc-i440fx-1.6        Standard PC (i440FX + PIIX, 1996)

pc-i440fx-1.5        Standard PC (i440FX + PIIX, 1996)

pc-i440fx-1.4        Standard PC (i440FX + PIIX, 1996)

pc-1.3               Standard PC (i440FX + PIIX, 1996)

pc-1.2               Standard PC (i440FX + PIIX, 1996)

pc-1.1               Standard PC (i440FX + PIIX, 1996)

pc-1.0               Standard PC (i440FX + PIIX, 1996)

pc-0.15              Standard PC (i440FX + PIIX, 1996)

pc-0.14              Standard PC (i440FX + PIIX, 1996)

pc-0.13              Standard PC (i440FX + PIIX, 1996)

pc-0.12              Standard PC (i440FX + PIIX, 1996)

pc-0.11              Standard PC (i440FX + PIIX, 1996)

pc-0.10              Standard PC (i440FX + PIIX, 1996)

q35                  Standard PC (Q35 + ICH9, 2009) (alias of pc-q35-2.8)

pc-q35-2.8           Standard PC (Q35 + ICH9, 2009)

pc-q35-2.7           Standard PC (Q35 + ICH9, 2009)

pc-q35-2.6           Standard PC (Q35 + ICH9, 2009)

pc-q35-2.5           Standard PC (Q35 + ICH9, 2009)

pc-q35-2.4           Standard PC (Q35 + ICH9, 2009)

isapc                ISA-only PC

none                 empty machine

xenfv                Xen Fully-virtualized PC

xenpv                Xen Para-virtualized PC


*$> kvm -cpu help*

Available CPUs:

x86              486

x86  Broadwell-noTSX  Intel Core Processor (Broadwell, no TSX)

x86        Broadwell  Intel Core Processor (Broadwell)

x86           Conroe  Intel Celeron_4x0 (Conroe/Merom Class Core 2)

x86    Haswell-noTSX  Intel Core Processor (Haswell, no TSX)

x86          Haswell  Intel Core Processor (Haswell)

x86        IvyBridge  Intel Xeon E3-12xx v2 (Ivy Bridge)

x86          Nehalem  Intel Core i7 9xx (Nehalem Class Core i7)

x86       Opteron_G1  AMD Opteron 240 (Gen 1 Class Opteron)

x86       Opteron_G2  AMD Opteron 22xx (Gen 2 Class Opteron)

x86       Opteron_G3  AMD Opteron 23xx (Gen 3 Class Opteron)

x86       Opteron_G4  AMD Opteron 62xx class CPU

x86       Opteron_G5  AMD Opteron 63xx class CPU

x86           Penryn  Intel Core 2 Duo P9xxx (Penryn Class Core 2)

x86      SandyBridge  Intel Xeon E312xx (Sandy Bridge)

x86   Skylake-Client  Intel Core Processor (Skylake)

x86         Westmere  Westmere E56xx/L56xx/X56xx (Nehalem-C)

x86           athlon  QEMU Virtual CPU version 2.5+

x86         core2duo  Intel(R) Core(TM)2 Duo CPU     T7700  @ 2.40GHz

x86          coreduo  Genuine Intel(R) CPU           T2600  @ 2.16GHz

x86            kvm32  Common 32-bit KVM processor

x86            kvm64  Common KVM processor

x86             n270  Intel(R) Atom(TM) CPU N270   @ 1.60GHz

x86          pentium

x86         pentium2

x86         pentium3

x86           phenom  AMD Phenom(tm) 9550 Quad-Core Processor

x86           qemu32  QEMU Virtual CPU version 2.5+

x86           qemu64  QEMU Virtual CPU version 2.5+

x86             host  KVM processor with all supported host features (only
available in KVM mode)


Recognized CPUID flags:

  fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36
pn clflush ds acpi mmx fxsr sse sse2 ss ht tm ia64 pbe

  pni pclmulqdq dtes64 monitor ds-cpl vmx smx est tm2 ssse3 cid fma cx16
xtpr pdcm pcid dca sse4.1 sse4.2 x2apic movbe popcnt tsc-deadline aes xsave
osxsave avx f16c rdrand hypervisor

  fsgsbase tsc-adjust bmi1 hle avx2 smep bmi2 erms invpcid rtm mpx avx512f
avx512dq rdseed adx smap avx512ifma pcommit clflushopt clwb avx512pf
avx512er avx512cd avx512bw avx512vl

  avx512vbmi umip pku ospke rdpid

  avx512-4vnniw avx512-4fmaps

  syscall nx mmxext fxsr-opt pdpe1gb rdtscp lm 3dnowext 3dnow

  lahf-lm cmp-legacy svm extapic cr8legacy abm sse4a misalignsse
3dnowprefetch osvw ibs xop skinit wdt lwp fma4 tce nodeid-msr tbm topoext
perfctr-core perfctr-nb

  invtsc

  xstore xstore-en xcrypt xcrypt-en ace2 ace2-en phe phe-en pmm pmm-en

  kvmclock kvm-nopiodelay kvm-mmu kvmclock kvm-asyncpf kvm-steal-time
kvm-pv-eoi kvm-pv-unhalt kvmclock-stable-bit




  npt lbrv svm-lock nrip-save tsc-scale vmcb-clean flushbyasid
decodeassists pause-filter pfthreshold

  xsaveopt xsavec xgetbv1 xsaves

  arat

Pino Toscano

2018-Mar-23 09:07 UTC

head link

Re: [Libguestfs] Issue with libguestfs-test-tool on a guest hosted on VMWare ESXi

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

Tanmoy Sinha

2018-Mar-23 17:35 UTC

head link

Re: [Libguestfs] 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

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