[Qemu-devel] [Bug 1067517] [NEW] qemu dosn't save snapshots with the 'commit' command

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[Qemu-devel] [Bug 1067517] [NEW] qemu dosn't save snapshots with the 'commit' command

Michael Mair-Keimberger-2
Public bug reported:

Usually there is the 'commit' command in qemu which is described as followed: "commit changes to the disk images (if -snapshot is used) or backing files"
>From the context i though if i start a guest with the "-snapshot" option, the commit command would save all the changes back to the file. I've tried it out but i didn't get it to work. I tried a few things like first use savevm or stop and than commit all, but actually nothing works.
Interestingly, when using qcow2 files qemu doesn't show's any error at all. The changes in the guest just won't get saved. But if i'm using lvm2 partitions i would get I/O errors after execute 'commit all'. That's probably because lvm2 doesn't support this feature.?!? However i made a attachment which shows the error's in the guest (dmesg).

Right now i started the guest with following command:
/usr/bin/qemu-system-x86_64 -name g64 -runas kvm -m 4096 -smp 2 \
-monitor unix:/var/run/kvm/g64.sock,server,nowait -pidfile /var/run/kvm/g64.pid -daemonize -snapshot \
-device virtio-serial -chardev spicevmc,id=vdagent,name=vdagent \
-device virtserialport,chardev=vdagent,name=com.redhat.spice.0 \
-drive file=/media/btrfs/g64.qcow2,if=virtio,cache=none,aio=threads \
-netdev type=tap,id=g64_3,vhost=on,ifname=qtap3,script=no,downscript=no \
-device virtio-net-pci,netdev=g64_3,mac=DE:AD:BE:EF:CB:22 \
-spice port=5803,addr=192.168.2.60,password=secret -k de -cpu host \
-usb -usbdevice tablet -vga qxl

The system is stable gentoo:
Portage 2.1.11.9 (default/linux/amd64/10.0/no-multilib, gcc-4.5.4, glibc-2.15-r2, 3.4.9-gentoo x86_64)
=================================================================
                        System Settings
=================================================================
System uname: Linux-3.4.9-gentoo-x86_64-Intel-R-_Xeon-R-_CPU_E5405_@_2.00GHz-with-gentoo-2.1
Timestamp of tree: Tue, 16 Oct 2012 03:45:01 +0000
app-shells/bash:          4.2_p37
dev-lang/python:          2.7.3-r2, 3.2.3
dev-util/cmake:           2.8.8-r3
dev-util/pkgconfig:       0.27.1
sys-apps/baselayout:      2.1-r1
sys-apps/openrc:          0.9.8.4
sys-apps/sandbox:         2.5
sys-devel/autoconf:       2.68
sys-devel/automake:       1.11.6
sys-devel/binutils:       2.22-r1
sys-devel/gcc:            4.5.4
sys-devel/gcc-config:     1.7.3
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:           2.15-r2
Repositories: gentoo x-local x11 sunrise virtualization
ACCEPT_KEYWORDS="amd64"
ACCEPT_LICENSE="* -@EULA"
CBUILD="x86_64-pc-linux-gnu"
CFLAGS="-O2 -pipe -march=native -fopenmp"
CHOST="x86_64-pc-linux-gnu"
CONFIG_PROTECT="/etc /usr/share/openvpn/easy-rsa"
CONFIG_PROTECT_MASK="/etc/ca-certificates.conf /etc/env.d /etc/fonts/fonts.conf /etc/gconf /etc/gentoo-release /etc/revdep-rebuild /etc/sandbox.d /etc/terminfo"
CXXFLAGS="-O2 -pipe -march=native -fopenmp"
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://gentoo.supp.name/                                http://ftp.fi.muni.cz/pub/linux/gentoo/                         http://gentoo.mirror.web4u.cz/                          http://gentoo.mirror.dkm.cz/pub/gentoo/                         http://gentoo.ynet.sk/pub"
LANG="de_DE.utf8"
LDFLAGS="-Wl,-O1 -Wl,--as-needed -fopenmp"
LINGUAS="en"
MAKEOPTS="-j12"
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="/home/clown/public/overlays/local /home/clown/public/overlays/layman/x11 /home/clown/public/overlays/layman/sunrise /home/clown/public/overlays/layman/virtualization"
SYNC="rsync://rsync.europe.gentoo.org/gentoo-portage/"
USE="acl acpi amd64 berkdb bzip2 cli cracklib crypt cups cxx dbus dri fortran gdbm gif gpm iconv ipv6 mmx modules mudflap ncurses nls nptl openmp pam pbm pcre png pppd readline session sqlite sse sse2 ssl ssse3 tcpd threads unicode 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="authn_core authz_core socache_shmcb unixd actions alias auth_basic authn_alias authn_anon authn_dbm authn_default authn_file authz_dbm authz_default authz_groupfile authz_host authz_owner authz_user autoindex cache cgi cgid dav dav_fs dav_lock deflate dir disk_cache env expires ext_filter file_cache filter headers include info log_config logio mem_cache mime mime_magic negotiation rewrite setenvif speling status unique_id userdir usertrack vhost_alias" 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="keyboard mouse evdev" KERNEL="linux" LCD_DEVICES="bayrad cfontz cfontz633 glk hd44780 lb216 lcdm001 mtxorb ncurses text" LIBREOFFICE_EXTENSIONS="presenter-console presenter-minimizer" LINGUAS="en" 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" SANE_BACKENDS="niash" USERLAND="GNU" VIDEO_CARDS="fbdev glint intel mach64 mga nouveau nv r128 radeon savage sis tdfx trident vesa via vmware dummy v4l" 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, PORTAGE_BUNZIP2_COMMAND, PORTAGE_COMPRESS, PORTAGE_COMPRESS_FLAGS, PORTAGE_RSYNC_EXTRA_OPTS, USE_PYTHON

=================================================================
                        Package Settings
=================================================================

app-emulation/qemu-1.1.1-r1 was built with the following:
USE="aio caps curl ncurses sasl spice vde vhost-net -alsa -bluetooth -brltty -debug -doc -fdt -opengl -pulseaudio -python -rbd -sdl -smartcard -static -tci -tls -usbredir -virtfs -xattr -xen -xfs" QEMU_SOFTMMU_TARGETS="i386 x86_64 (-alpha) (-arm) -cris (-m68k) -microblaze -microblazeel (-mips) -mips64 -mips64el -mipsel (-ppc) (-ppc64) -ppcemb -s390x -sh4 -sh4eb (-sparc) -sparc64 -xtensa -xtensaeb" QEMU_USER_TARGETS="i386 x86_64 (-alpha) (-arm) -armeb -cris (-m68k) -microblaze -microblazeel (-mips) -mipsel (-ppc) (-ppc64) -ppc64abi32 -s390x -sh4 -sh4eb (-sparc) -sparc32plus -sparc64 -unicore32"

** Affects: qemu
     Importance: Undecided
         Status: New

** Attachment added: "I/O error in the guest after commit all"
   https://bugs.launchpad.net/bugs/1067517/+attachment/3400732/+files/qemu

--
You received this bug notification because you are a member of qemu-
devel-ml, which is subscribed to QEMU.
https://bugs.launchpad.net/bugs/1067517

Title:
  qemu dosn't save snapshots with the 'commit' command

Status in QEMU:
  New

Bug description:
  Usually there is the 'commit' command in qemu which is described as followed: "commit changes to the disk images (if -snapshot is used) or backing files"
  From the context i though if i start a guest with the "-snapshot" option, the commit command would save all the changes back to the file. I've tried it out but i didn't get it to work. I tried a few things like first use savevm or stop and than commit all, but actually nothing works.
  Interestingly, when using qcow2 files qemu doesn't show's any error at all. The changes in the guest just won't get saved. But if i'm using lvm2 partitions i would get I/O errors after execute 'commit all'. That's probably because lvm2 doesn't support this feature.?!? However i made a attachment which shows the error's in the guest (dmesg).

  Right now i started the guest with following command:
  /usr/bin/qemu-system-x86_64 -name g64 -runas kvm -m 4096 -smp 2 \
  -monitor unix:/var/run/kvm/g64.sock,server,nowait -pidfile /var/run/kvm/g64.pid -daemonize -snapshot \
  -device virtio-serial -chardev spicevmc,id=vdagent,name=vdagent \
  -device virtserialport,chardev=vdagent,name=com.redhat.spice.0 \
  -drive file=/media/btrfs/g64.qcow2,if=virtio,cache=none,aio=threads \
  -netdev type=tap,id=g64_3,vhost=on,ifname=qtap3,script=no,downscript=no \
  -device virtio-net-pci,netdev=g64_3,mac=DE:AD:BE:EF:CB:22 \
  -spice port=5803,addr=192.168.2.60,password=secret -k de -cpu host \
  -usb -usbdevice tablet -vga qxl

  The system is stable gentoo:
  Portage 2.1.11.9 (default/linux/amd64/10.0/no-multilib, gcc-4.5.4, glibc-2.15-r2, 3.4.9-gentoo x86_64)
  =================================================================
                          System Settings
  =================================================================
  System uname: Linux-3.4.9-gentoo-x86_64-Intel-R-_Xeon-R-_CPU_E5405_@_2.00GHz-with-gentoo-2.1
  Timestamp of tree: Tue, 16 Oct 2012 03:45:01 +0000
  app-shells/bash:          4.2_p37
  dev-lang/python:          2.7.3-r2, 3.2.3
  dev-util/cmake:           2.8.8-r3
  dev-util/pkgconfig:       0.27.1
  sys-apps/baselayout:      2.1-r1
  sys-apps/openrc:          0.9.8.4
  sys-apps/sandbox:         2.5
  sys-devel/autoconf:       2.68
  sys-devel/automake:       1.11.6
  sys-devel/binutils:       2.22-r1
  sys-devel/gcc:            4.5.4
  sys-devel/gcc-config:     1.7.3
  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:           2.15-r2
  Repositories: gentoo x-local x11 sunrise virtualization
  ACCEPT_KEYWORDS="amd64"
  ACCEPT_LICENSE="* -@EULA"
  CBUILD="x86_64-pc-linux-gnu"
  CFLAGS="-O2 -pipe -march=native -fopenmp"
  CHOST="x86_64-pc-linux-gnu"
  CONFIG_PROTECT="/etc /usr/share/openvpn/easy-rsa"
  CONFIG_PROTECT_MASK="/etc/ca-certificates.conf /etc/env.d /etc/fonts/fonts.conf /etc/gconf /etc/gentoo-release /etc/revdep-rebuild /etc/sandbox.d /etc/terminfo"
  CXXFLAGS="-O2 -pipe -march=native -fopenmp"
  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://gentoo.supp.name/                                http://ftp.fi.muni.cz/pub/linux/gentoo/                         http://gentoo.mirror.web4u.cz/                          http://gentoo.mirror.dkm.cz/pub/gentoo/                         http://gentoo.ynet.sk/pub"
  LANG="de_DE.utf8"
  LDFLAGS="-Wl,-O1 -Wl,--as-needed -fopenmp"
  LINGUAS="en"
  MAKEOPTS="-j12"
  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="/home/clown/public/overlays/local /home/clown/public/overlays/layman/x11 /home/clown/public/overlays/layman/sunrise /home/clown/public/overlays/layman/virtualization"
  SYNC="rsync://rsync.europe.gentoo.org/gentoo-portage/"
  USE="acl acpi amd64 berkdb bzip2 cli cracklib crypt cups cxx dbus dri fortran gdbm gif gpm iconv ipv6 mmx modules mudflap ncurses nls nptl openmp pam pbm pcre png pppd readline session sqlite sse sse2 ssl ssse3 tcpd threads unicode 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="authn_core authz_core socache_shmcb unixd actions alias auth_basic authn_alias authn_anon authn_dbm authn_default authn_file authz_dbm authz_default authz_groupfile authz_host authz_owner authz_user autoindex cache cgi cgid dav dav_fs dav_lock deflate dir disk_cache env expires ext_filter file_cache filter headers include info log_config logio mem_cache mime mime_magic negotiation rewrite setenvif speling status unique_id userdir usertrack vhost_alias" 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="keyboard mouse evdev" KERNEL="linux" LCD_DEVICES="bayrad cfontz cfontz633 glk hd44780 lb216 lcdm001 mtxorb ncurses text" LIBREOFFICE_EXTENSIONS="presenter-console presenter-minimizer" LINGUAS="en" 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" SANE_BACKENDS="niash" USERLAND="GNU" VIDEO_CARDS="fbdev glint intel mach64 mga nouveau nv r128 radeon savage sis tdfx trident vesa via vmware dummy v4l" 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, PORTAGE_BUNZIP2_COMMAND, PORTAGE_COMPRESS, PORTAGE_COMPRESS_FLAGS, PORTAGE_RSYNC_EXTRA_OPTS, USE_PYTHON

  =================================================================
                          Package Settings
  =================================================================

  app-emulation/qemu-1.1.1-r1 was built with the following:
  USE="aio caps curl ncurses sasl spice vde vhost-net -alsa -bluetooth -brltty -debug -doc -fdt -opengl -pulseaudio -python -rbd -sdl -smartcard -static -tci -tls -usbredir -virtfs -xattr -xen -xfs" QEMU_SOFTMMU_TARGETS="i386 x86_64 (-alpha) (-arm) -cris (-m68k) -microblaze -microblazeel (-mips) -mips64 -mips64el -mipsel (-ppc) (-ppc64) -ppcemb -s390x -sh4 -sh4eb (-sparc) -sparc64 -xtensa -xtensaeb" QEMU_USER_TARGETS="i386 x86_64 (-alpha) (-arm) -armeb -cris (-m68k) -microblaze -microblazeel (-mips) -mipsel (-ppc) (-ppc64) -ppc64abi32 -s390x -sh4 -sh4eb (-sparc) -sparc32plus -sparc64 -unicore32"

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[Bug 1067517] Re: qemu dosn't save snapshots with the 'commit' command

Thomas Huth-179
Triaging old bug tickets ... Can you still reproduce this problem with
the latest version of QEMU (currently version 2.9.0)?

** Changed in: qemu
       Status: New => Incomplete

--
You received this bug notification because you are a member of qemu-
devel-ml, which is subscribed to QEMU.
https://bugs.launchpad.net/bugs/1067517

Title:
  qemu dosn't save snapshots with the 'commit' command

Status in QEMU:
  Incomplete

Bug description:
  Usually there is the 'commit' command in qemu which is described as followed: "commit changes to the disk images (if -snapshot is used) or backing files"
  From the context i though if i start a guest with the "-snapshot" option, the commit command would save all the changes back to the file. I've tried it out but i didn't get it to work. I tried a few things like first use savevm or stop and than commit all, but actually nothing works.
  Interestingly, when using qcow2 files qemu doesn't show's any error at all. The changes in the guest just won't get saved. But if i'm using lvm2 partitions i would get I/O errors after execute 'commit all'. That's probably because lvm2 doesn't support this feature.?!? However i made a attachment which shows the error's in the guest (dmesg).

  Right now i started the guest with following command:
  /usr/bin/qemu-system-x86_64 -name g64 -runas kvm -m 4096 -smp 2 \
  -monitor unix:/var/run/kvm/g64.sock,server,nowait -pidfile /var/run/kvm/g64.pid -daemonize -snapshot \
  -device virtio-serial -chardev spicevmc,id=vdagent,name=vdagent \
  -device virtserialport,chardev=vdagent,name=com.redhat.spice.0 \
  -drive file=/media/btrfs/g64.qcow2,if=virtio,cache=none,aio=threads \
  -netdev type=tap,id=g64_3,vhost=on,ifname=qtap3,script=no,downscript=no \
  -device virtio-net-pci,netdev=g64_3,mac=DE:AD:BE:EF:CB:22 \
  -spice port=5803,addr=192.168.2.60,password=secret -k de -cpu host \
  -usb -usbdevice tablet -vga qxl

  The system is stable gentoo:
  Portage 2.1.11.9 (default/linux/amd64/10.0/no-multilib, gcc-4.5.4, glibc-2.15-r2, 3.4.9-gentoo x86_64)
  =================================================================
                          System Settings
  =================================================================
  System uname: Linux-3.4.9-gentoo-x86_64-Intel-R-_Xeon-R-_CPU_E5405_@_2.00GHz-with-gentoo-2.1
  Timestamp of tree: Tue, 16 Oct 2012 03:45:01 +0000
  app-shells/bash:          4.2_p37
  dev-lang/python:          2.7.3-r2, 3.2.3
  dev-util/cmake:           2.8.8-r3
  dev-util/pkgconfig:       0.27.1
  sys-apps/baselayout:      2.1-r1
  sys-apps/openrc:          0.9.8.4
  sys-apps/sandbox:         2.5
  sys-devel/autoconf:       2.68
  sys-devel/automake:       1.11.6
  sys-devel/binutils:       2.22-r1
  sys-devel/gcc:            4.5.4
  sys-devel/gcc-config:     1.7.3
  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:           2.15-r2
  Repositories: gentoo x-local x11 sunrise virtualization
  ACCEPT_KEYWORDS="amd64"
  ACCEPT_LICENSE="* -@EULA"
  CBUILD="x86_64-pc-linux-gnu"
  CFLAGS="-O2 -pipe -march=native -fopenmp"
  CHOST="x86_64-pc-linux-gnu"
  CONFIG_PROTECT="/etc /usr/share/openvpn/easy-rsa"
  CONFIG_PROTECT_MASK="/etc/ca-certificates.conf /etc/env.d /etc/fonts/fonts.conf /etc/gconf /etc/gentoo-release /etc/revdep-rebuild /etc/sandbox.d /etc/terminfo"
  CXXFLAGS="-O2 -pipe -march=native -fopenmp"
  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://gentoo.supp.name/                                http://ftp.fi.muni.cz/pub/linux/gentoo/                         http://gentoo.mirror.web4u.cz/                          http://gentoo.mirror.dkm.cz/pub/gentoo/                         http://gentoo.ynet.sk/pub"
  LANG="de_DE.utf8"
  LDFLAGS="-Wl,-O1 -Wl,--as-needed -fopenmp"
  LINGUAS="en"
  MAKEOPTS="-j12"
  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="/home/clown/public/overlays/local /home/clown/public/overlays/layman/x11 /home/clown/public/overlays/layman/sunrise /home/clown/public/overlays/layman/virtualization"
  SYNC="rsync://rsync.europe.gentoo.org/gentoo-portage/"
  USE="acl acpi amd64 berkdb bzip2 cli cracklib crypt cups cxx dbus dri fortran gdbm gif gpm iconv ipv6 mmx modules mudflap ncurses nls nptl openmp pam pbm pcre png pppd readline session sqlite sse sse2 ssl ssse3 tcpd threads unicode 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="authn_core authz_core socache_shmcb unixd actions alias auth_basic authn_alias authn_anon authn_dbm authn_default authn_file authz_dbm authz_default authz_groupfile authz_host authz_owner authz_user autoindex cache cgi cgid dav dav_fs dav_lock deflate dir disk_cache env expires ext_filter file_cache filter headers include info log_config logio mem_cache mime mime_magic negotiation rewrite setenvif speling status unique_id userdir usertrack vhost_alias" 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="keyboard mouse evdev" KERNEL="linux" LCD_DEVICES="bayrad cfontz cfontz633 glk hd44780 lb216 lcdm001 mtxorb ncurses text" LIBREOFFICE_EXTENSIONS="presenter-console presenter-minimizer" LINGUAS="en" 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" SANE_BACKENDS="niash" USERLAND="GNU" VIDEO_CARDS="fbdev glint intel mach64 mga nouveau nv r128 radeon savage sis tdfx trident vesa via vmware dummy v4l" 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, PORTAGE_BUNZIP2_COMMAND, PORTAGE_COMPRESS, PORTAGE_COMPRESS_FLAGS, PORTAGE_RSYNC_EXTRA_OPTS, USE_PYTHON

  =================================================================
                          Package Settings
  =================================================================

  app-emulation/qemu-1.1.1-r1 was built with the following:
  USE="aio caps curl ncurses sasl spice vde vhost-net -alsa -bluetooth -brltty -debug -doc -fdt -opengl -pulseaudio -python -rbd -sdl -smartcard -static -tci -tls -usbredir -virtfs -xattr -xen -xfs" QEMU_SOFTMMU_TARGETS="i386 x86_64 (-alpha) (-arm) -cris (-m68k) -microblaze -microblazeel (-mips) -mips64 -mips64el -mipsel (-ppc) (-ppc64) -ppcemb -s390x -sh4 -sh4eb (-sparc) -sparc64 -xtensa -xtensaeb" QEMU_USER_TARGETS="i386 x86_64 (-alpha) (-arm) -armeb -cris (-m68k) -microblaze -microblazeel (-mips) -mipsel (-ppc) (-ppc64) -ppc64abi32 -s390x -sh4 -sh4eb (-sparc) -sparc32plus -sparc64 -unicore32"

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[Bug 1067517] Re: qemu dosn't save snapshots with the 'commit' command

Thomas Huth-179
In reply to this post by Michael Mair-Keimberger-2
[Expired for QEMU because there has been no activity for 60 days.]

** Changed in: qemu
       Status: Incomplete => Expired

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https://bugs.launchpad.net/bugs/1067517

Title:
  qemu dosn't save snapshots with the 'commit' command

Status in QEMU:
  Expired

Bug description:
  Usually there is the 'commit' command in qemu which is described as followed: "commit changes to the disk images (if -snapshot is used) or backing files"
  From the context i though if i start a guest with the "-snapshot" option, the commit command would save all the changes back to the file. I've tried it out but i didn't get it to work. I tried a few things like first use savevm or stop and than commit all, but actually nothing works.
  Interestingly, when using qcow2 files qemu doesn't show's any error at all. The changes in the guest just won't get saved. But if i'm using lvm2 partitions i would get I/O errors after execute 'commit all'. That's probably because lvm2 doesn't support this feature.?!? However i made a attachment which shows the error's in the guest (dmesg).

  Right now i started the guest with following command:
  /usr/bin/qemu-system-x86_64 -name g64 -runas kvm -m 4096 -smp 2 \
  -monitor unix:/var/run/kvm/g64.sock,server,nowait -pidfile /var/run/kvm/g64.pid -daemonize -snapshot \
  -device virtio-serial -chardev spicevmc,id=vdagent,name=vdagent \
  -device virtserialport,chardev=vdagent,name=com.redhat.spice.0 \
  -drive file=/media/btrfs/g64.qcow2,if=virtio,cache=none,aio=threads \
  -netdev type=tap,id=g64_3,vhost=on,ifname=qtap3,script=no,downscript=no \
  -device virtio-net-pci,netdev=g64_3,mac=DE:AD:BE:EF:CB:22 \
  -spice port=5803,addr=192.168.2.60,password=secret -k de -cpu host \
  -usb -usbdevice tablet -vga qxl

  The system is stable gentoo:
  Portage 2.1.11.9 (default/linux/amd64/10.0/no-multilib, gcc-4.5.4, glibc-2.15-r2, 3.4.9-gentoo x86_64)
  =================================================================
                          System Settings
  =================================================================
  System uname: Linux-3.4.9-gentoo-x86_64-Intel-R-_Xeon-R-_CPU_E5405_@_2.00GHz-with-gentoo-2.1
  Timestamp of tree: Tue, 16 Oct 2012 03:45:01 +0000
  app-shells/bash:          4.2_p37
  dev-lang/python:          2.7.3-r2, 3.2.3
  dev-util/cmake:           2.8.8-r3
  dev-util/pkgconfig:       0.27.1
  sys-apps/baselayout:      2.1-r1
  sys-apps/openrc:          0.9.8.4
  sys-apps/sandbox:         2.5
  sys-devel/autoconf:       2.68
  sys-devel/automake:       1.11.6
  sys-devel/binutils:       2.22-r1
  sys-devel/gcc:            4.5.4
  sys-devel/gcc-config:     1.7.3
  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:           2.15-r2
  Repositories: gentoo x-local x11 sunrise virtualization
  ACCEPT_KEYWORDS="amd64"
  ACCEPT_LICENSE="* -@EULA"
  CBUILD="x86_64-pc-linux-gnu"
  CFLAGS="-O2 -pipe -march=native -fopenmp"
  CHOST="x86_64-pc-linux-gnu"
  CONFIG_PROTECT="/etc /usr/share/openvpn/easy-rsa"
  CONFIG_PROTECT_MASK="/etc/ca-certificates.conf /etc/env.d /etc/fonts/fonts.conf /etc/gconf /etc/gentoo-release /etc/revdep-rebuild /etc/sandbox.d /etc/terminfo"
  CXXFLAGS="-O2 -pipe -march=native -fopenmp"
  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://gentoo.supp.name/                                http://ftp.fi.muni.cz/pub/linux/gentoo/                         http://gentoo.mirror.web4u.cz/                          http://gentoo.mirror.dkm.cz/pub/gentoo/                         http://gentoo.ynet.sk/pub"
  LANG="de_DE.utf8"
  LDFLAGS="-Wl,-O1 -Wl,--as-needed -fopenmp"
  LINGUAS="en"
  MAKEOPTS="-j12"
  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="/home/clown/public/overlays/local /home/clown/public/overlays/layman/x11 /home/clown/public/overlays/layman/sunrise /home/clown/public/overlays/layman/virtualization"
  SYNC="rsync://rsync.europe.gentoo.org/gentoo-portage/"
  USE="acl acpi amd64 berkdb bzip2 cli cracklib crypt cups cxx dbus dri fortran gdbm gif gpm iconv ipv6 mmx modules mudflap ncurses nls nptl openmp pam pbm pcre png pppd readline session sqlite sse sse2 ssl ssse3 tcpd threads unicode 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="authn_core authz_core socache_shmcb unixd actions alias auth_basic authn_alias authn_anon authn_dbm authn_default authn_file authz_dbm authz_default authz_groupfile authz_host authz_owner authz_user autoindex cache cgi cgid dav dav_fs dav_lock deflate dir disk_cache env expires ext_filter file_cache filter headers include info log_config logio mem_cache mime mime_magic negotiation rewrite setenvif speling status unique_id userdir usertrack vhost_alias" 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="keyboard mouse evdev" KERNEL="linux" LCD_DEVICES="bayrad cfontz cfontz633 glk hd44780 lb216 lcdm001 mtxorb ncurses text" LIBREOFFICE_EXTENSIONS="presenter-console presenter-minimizer" LINGUAS="en" 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" SANE_BACKENDS="niash" USERLAND="GNU" VIDEO_CARDS="fbdev glint intel mach64 mga nouveau nv r128 radeon savage sis tdfx trident vesa via vmware dummy v4l" 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, PORTAGE_BUNZIP2_COMMAND, PORTAGE_COMPRESS, PORTAGE_COMPRESS_FLAGS, PORTAGE_RSYNC_EXTRA_OPTS, USE_PYTHON

  =================================================================
                          Package Settings
  =================================================================

  app-emulation/qemu-1.1.1-r1 was built with the following:
  USE="aio caps curl ncurses sasl spice vde vhost-net -alsa -bluetooth -brltty -debug -doc -fdt -opengl -pulseaudio -python -rbd -sdl -smartcard -static -tci -tls -usbredir -virtfs -xattr -xen -xfs" QEMU_SOFTMMU_TARGETS="i386 x86_64 (-alpha) (-arm) -cris (-m68k) -microblaze -microblazeel (-mips) -mips64 -mips64el -mipsel (-ppc) (-ppc64) -ppcemb -s390x -sh4 -sh4eb (-sparc) -sparc64 -xtensa -xtensaeb" QEMU_USER_TARGETS="i386 x86_64 (-alpha) (-arm) -armeb -cris (-m68k) -microblaze -microblazeel (-mips) -mipsel (-ppc) (-ppc64) -ppc64abi32 -s390x -sh4 -sh4eb (-sparc) -sparc32plus -sparc64 -unicore32"

To manage notifications about this bug go to:
https://bugs.launchpad.net/qemu/+bug/1067517/+subscriptions

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