Bug 432234 – app-emulation/qemu-kvm-1.1.1-r1 freezes with high cpu utilization when using utilities from app-emulation/libguestfs-18.2-r*

• Product: Gentoo Linux
• Status: RESOLVED NEEDINFO

[Description REdOG 2012-08-21 19:00:45 UTC]

Running any of the utilities from libguestfs results in qemu-system-x86 hanging.

kernel 3.3.8 
app-emulation/qemu-kvm-1.1.1-r1
sys-firmware/seabios-1.7.0
app-emulation/libguestfs-18.2 [installed with patch from Bug #427842]





Reproducible: Always

Steps to Reproduce:
1. emerge qemu-kvm
2. emerge libguestfs
3. libguestfs-test-tool
Actual Results:  
    #libguestfs-test-tool
    ===== Test starts here =====
    LIBGUESTFS_PATH=/usr/share/guestfs/appliance/
    TMPDIR=(not set)
    library version: 1.18.2-gentoo
    guestfs_get_append: (null)
    guestfs_get_attach_method: appliance
    guestfs_get_autosync: 1
    guestfs_get_direct: 0
    guestfs_get_memsize: 500
    guestfs_get_network: 0
    guestfs_get_path: /usr/share/guestfs/appliance/
    guestfs_get_pgroup: 0
    guestfs_get_qemu: /usr/bin/qemu-kvm
    guestfs_get_recovery_proc: 1
    guestfs_get_selinux: 0
    guestfs_get_smp: 1
    guestfs_get_trace: 0
    guestfs_get_verbose: 1
    host_cpu: x86_64
    Launching appliance, timeout set to 600 seconds.
    libguestfs: [00000ms] begin testing qemu features
    libguestfs: [00023ms] finished testing qemu features
    libguestfs: accept_from_daemon: 0x6072e0 g->state = 1
    [00023ms] /usr/bin/qemu-kvm \
        -global virtio-blk-pci.scsi=off \
        -nodefconfig \
        -nodefaults \
        -nographic \
        -drive file=/tmp/libguestfs-test-tool-sda-rxVzSi,cache=off,format=raw,if=virtio \
        -machine accel=kvm:tcg \
        -m 500 \
        -no-reboot \
        -no-hpet \
        -device virtio-serial \
        -serial stdio \
        -chardev socket,path=/tmp/libguestfsdzOCkl/guestfsd.sock,id=channel0 \
        -device virtserialport,chardev=channel0,name=org.libguestfs.channel.0 \
        -kernel /usr/share/guestfs/appliance//kernel \
        -initrd /usr/share/guestfs/appliance//initrd \
        -append 'panic=1 console=ttyS0 udevtimeout=300 no_timer_check acpi=off printk.time=1 cgroup_disable=memory selinux=0 guestfs_verbose=1 TERM=rxvt-unicode-256color ' \
        -drive file=/usr/share/guestfs/appliance//root,snapshot=on,if=virtio,cache=unsafe


Expected Results:  
Test tool should complete instead of hang.
The same hang happens running any of the utilities including virt-list-filesystems, virt-win-reg, etc...

Portage 2.1.11.9 (default/linux/amd64/10.0, gcc-4.5.3, glibc-2.14.1-r3, 3.3.8-gentoo x86_64)
=================================================================
System uname: Linux-3.3.8-gentoo-x86_64-Intel-R-_Core-TM-2_Duo_CPU_E8400_@_3.00GHz-with-gentoo-2.1
Timestamp of tree: Tue, 21 Aug 2012 16:00:01 +0000
ccache version 3.1.6 [disabled]
app-shells/bash:          4.2_p20
dev-java/java-config:     2.1.11-r3
dev-lang/python:          2.7.3-r2, 3.2.3
dev-util/ccache:          3.1.6
dev-util/cmake:           2.8.7-r5
dev-util/pkgconfig:       0.26
sys-apps/baselayout:      2.1-r1
sys-apps/openrc:          0.9.8.4
sys-apps/sandbox:         2.5
sys-devel/autoconf:       2.13, 2.68
sys-devel/automake:       1.9.6-r3, 1.11.1
sys-devel/binutils:       2.22-r1
sys-devel/gcc:            4.5.3-r2
sys-devel/gcc-config:     1.6
sys-devel/libtool:        2.4-r1
sys-devel/make:           3.82-r3
sys-kernel/linux-headers: 3.4-r2 (virtual/os-headers)
sys-libs/glibc:           2.14.1-r3
Repositories: gentoo enlightenment x-portage
ACCEPT_KEYWORDS="amd64"
ACCEPT_LICENSE="*"
CBUILD="x86_64-pc-linux-gnu"
CFLAGS="-O2 -march=core2 -pipe"
CHOST="x86_64-pc-linux-gnu"
CONFIG_PROTECT="/etc /usr/share/gnupg/qualified.txt"
CONFIG_PROTECT_MASK="/etc/ca-certificates.conf /etc/env.d /etc/env.d/java/ /etc/fonts/fonts.conf /etc/gconf /etc/gentoo-release /etc/init.d /etc/revdep-rebuild /etc/sandbox.d /etc/terminfo"
CXXFLAGS="-O2 -march=core2 -pipe"
DISTDIR="/usr/portage/distfiles"
FCFLAGS="-O2 -pipe"
FEATURES="assume-digests binpkg-logs config-protect-if-modified distlocks ebuild-locks fixlafiles news parallel-fetch parse-eapi-ebuild-head protect-owned sandbox sfperms strict unknown-features-warn unmerge-logs unmerge-orphans userfetch"
FFLAGS="-O2 -pipe"
GENTOO_MIRRORS="http://distfiles.gentoo.org"
LANG="en_US.UTF-8"
LDFLAGS="-Wl,-O1 -Wl,--as-needed"
MAKEOPTS="-j3"
PKGDIR="/usr/portage/packages"
PORTAGE_CONFIGROOT="/"
PORTAGE_RSYNC_OPTS="--recursive --links --safe-links --perms --times --compress --force --whole-file --delete --stats --human-readable --timeout=180 --exclude=/distfiles --exclude=/local --exclude=/packages"
PORTAGE_TMPDIR="/var/tmp"
PORTDIR="/usr/portage"
PORTDIR_OVERLAY="/var/lib/layman/enlightenment /usr/local/portage"
SYNC="rsync://rsync.gentoo.org/gentoo-portage"
USE="acl alsa amd64 apache2 berkdb bzip2 cli cracklib crypt cups cxx dri fortran gd gdbm gpm iconv ldap mmx modules mudflap multilib ncurses nls nptl openmp pam pcre pppd readline samba session sguil sse sse2 ssl tcpd tordns unicode vim xml zlib" ALSA_CARDS="ali5451 als4000 atiixp atiixp-modem bt87x ca0106 cmipci emu10k1x ens1370 ens1371 es1938 es1968 fm801 hda-intel intel8x0 intel8x0m maestro3 trident usb-audio via82xx via82xx-modem ymfpci" ALSA_PCM_PLUGINS="adpcm alaw asym copy dmix dshare dsnoop empty extplug file hooks iec958 ioplug ladspa lfloat linear meter mmap_emul mulaw multi null plug rate route share shm softvol" APACHE2_MODULES="access auth auth_dbm authn_file auth_anon auth_digest authz_host auth_basic authz_user authz_default alias file_cache echo charset_lite cache disk_cache mem_cache ext_filter case_filter case_filter_in filter deflate mime_magic cern_meta expires headers usertrack unique_id proxy proxy_connect proxy_ftp proxy_http info include cgi cgid dav vhost_alias speling rewrite log_config logio env setenvif mime status autoindex asis negotiation dir imap actions userdir so dav_fs dav_lock authn_alias authn_default authz_groupfile authz_owner" CALLIGRA_FEATURES="kexi words flow plan sheets stage tables krita karbon braindump" CAMERAS="ptp2" COLLECTD_PLUGINS="df interface irq load memory rrdtool swap syslog" ELIBC="glibc" GPSD_PROTOCOLS="ashtech aivdm earthmate evermore fv18 garmin garmintxt gpsclock itrax mtk3301 nmea ntrip navcom oceanserver oldstyle oncore rtcm104v2 rtcm104v3 sirf superstar2 timing tsip tripmate tnt ubx" INPUT_DEVICES="evdev keyboard mouse" KERNEL="linux" LCD_DEVICES="bayrad cfontz cfontz633 glk hd44780 lb216 lcdm001 mtxorb ncurses text" LIBREOFFICE_EXTENSIONS="presenter-console presenter-minimizer" PHP_TARGETS="php5-3" PYTHON_TARGETS="python3_2 python2_7" QEMU_SOFTMMU_TARGETS="i386 x86_64" QEMU_USER_TARGETS="i386 x86_64" RUBY_TARGETS="ruby18 ruby19" USERLAND="GNU" VIDEO_CARDS="vga nvidia" XTABLES_ADDONS="quota2 psd pknock lscan length2 ipv4options ipset ipp2p iface geoip fuzzy condition tee tarpit sysrq steal rawnat logmark ipmark dhcpmac delude chaos account"
Unset:  CPPFLAGS, CTARGET, EMERGE_DEFAULT_OPTS, INSTALL_MASK, LC_ALL, LINGUAS, PORTAGE_BUNZIP2_COMMAND, PORTAGE_COMPRESS, PORTAGE_COMPRESS_FLAGS, PORTAGE_RSYNC_EXTRA_OPTS, USE_PYTHON

[Comment 1 Richard Jones 2012-08-21 19:57:41 UTC]

FWIW Debian had a similar bug, fixed by updated qemu to a newer
version.  See:
http://www.mail-archive.com/[e-mail]/msg1056306.html

If that doesn't work, try looking at what qemu is actually doing.
You could try attaching gdb to the guest, as described here:

http://libguestfs.org/guestfs-performance.1.html#detailed-debugging-using-gdb

[Comment 2 Doug Goldstein (RETIRED) 2012-08-21 21:19:32 UTC]

The Debian fix was to upgrade to qemu-kvm 1.1.1 but in this case the user's issue is happening with qemu-kvm 1.1.1. Its possible Debian is carrying a different patchset then Gentoo is as our patchset matches better with what Fedora carries but I'll have to check what differs.

That being said, the best way forward right now is to do exactly what Richard suggested in comment #1 and attach the results.

[Comment 3 Doug Goldstein (RETIRED) 2012-09-10 02:30:16 UTC]

ping REdOG: Any chance you can provide the feedback requested?

[Comment 4 Andreis Vinogradovs ( slepnoga ) 2012-10-28 18:19:42 UTC]

I'm bump and maksbotan commited new version  libguestfs.
REdOG, pleas confirm or not this bug in new version