Max, Qemu still crashes for me, but the debug is again very different. When I attach to the qemu process from gdb, it is unable to provide a backtrace when it crashes. The log file is different too. Any ideas?
qemu-system-x86_64: block.c:2307: bdrv_replace_in_backing_chain: Assertion `!bdrv_requests_pending(old)' failed. (gdb) attach 5563 Attaching to process 5563 Reading symbols from /usr/bin/qemu-system-x86_64...cdone. oReading symbols from /usr/lib64/libepoxy.so.0...(no debugging symbols found)...done. Reading symbols from /usr/lib64/libdrm.so.2...(no debugging symbols found)...done. Reading symbols from /usr/lib64/libgbm.so.1...(no debugging symbols found)...done. Reading symbols from /usr/lib64/libX11.so.6...n(no debugging symbols found)...done. Reading symbols from /usr/lib64/libz.so.1...(no debugging symbols found)...done. Reading symbols from /lib64/libaio.so.1...(no debugging symbols found)...done. Reading symbols from /usr/lib64/libiscsi.so.4...done. Reading symbols from /usr/lib64/libcurl.so.4...(no debugging symbols found)...done. Reading symbols from /lib64/libacl.so.1...(no debugging symbols found)...done. Reading symbols from /usr/lib64/libgfapi.so.0...done. Reading symbols from /usr/lib64/libglusterfs.so.0...done. Reading symbols from /usr/lib64/libgfrpc.so.0...done. Reading symbols from /usr/lib64/libgfxdr.so.0...done. Reading symbols from /lib64/libuuid.so.1...(no debugging symbols found)...done. Reading symbols from /usr/lib64/libssh2.so.1...done. Reading symbols from /lib64/libbz2.so.1...(no debugging symbols found)...done. Reading symbols from /usr/lib64/libpixman-1.so.0...(no debugging symbols found)...done. Reading symbols from /lib64/libutil.so.1...(no debugging symbols found)...done. Reading symbols from /lib64/libncurses.so.5...(no debugging symbols found)...done. Reading symbols from /usr/lib64/libpng16.so.16...(no debugging symbols found)...done. Reading symbols from /usr/lib64/libjpeg.so.62...(no debugging symbols found)...done. Reading symbols from /usr/lib64/libsasl2.so.3...(no debugging symbols found)...done. Reading symbols from /usr/lib64/libSDL-1.2.so.0...(no debugging symbols found)...done. Reading symbols from /lib64/libpthread.so.0...(no debugging symbols found)...done. [New LWP 5588] [New LWP 5587] [New LWP 5586] [New LWP 5585] [New LWP 5584] [New LWP 5583] [New LWP 5582] [New LWP 5581] [New LWP 5580] [New LWP 5579] [New LWP 5578] [New LWP 5577] [New LWP 5576] [New LWP 5575] [New LWP 5574] [New LWP 5573] [New LWP 5572] [New LWP 5571] [New LWP 5570] [New LWP 5568] [New LWP 5567] [New LWP 5566] [New LWP 5564] [Thread debugging using libthread_db enabled] Using host libthread_db library "/lib64/libthread_db.so.1". Reading symbols from /usr/lib64/libvte.so.9...(no debugging symbols found)...done. Reading symbols from /usr/lib64/libgtk-x11-2.0.so.0...(no debugging symbols found)...done. Reading symbols from /usr/lib64/libgdk-x11-2.0.so.0...(no debugging symbols found)...done. Reading symbols from /usr/lib64/libpangocairo-1.0.so.0...(no debugging symbols found)...done. Reading symbols from /usr/lib64/libatk-1.0.so.0...(no debugging symbols found)...done. Reading symbols from /usr/lib64/libgdk_pixbuf-2.0.so.0...(no debugging symbols found)...done. Reading symbols from /usr/lib64/libpangoft2-1.0.so.0...(no debugging symbols found)...done. Reading symbols from /usr/lib64/libpango-1.0.so.0...(no debugging symbols found)...done. Reading symbols from /usr/lib64/libfontconfig.so.1...(no debugging symbols found)...done. Reading symbols from /usr/lib64/libfreetype.so.6...(no debugging symbols found)...done. Reading symbols from /usr/lib64/libgio-2.0.so.0...t(no debugging symbols found)...done. Reading symbols from /usr/lib64/libgobject-2.0.so.0...(no debugging symbols found)...done. Reading symbols from /usr/lib64/libglib-2.0.so.0...(no debugging symbols found)...done. Reading symbols from /usr/lib64/libcairo.so.2...(no debugging symbols found)...done. Reading symbols from /usr/lib64/libXext.so.6...(no debugging symbols found)...done. Reading symbols from /usr/lib64/libnettle.so.6...(no debugging symbols found)...done. Reading symbols from /usr/lib64/libgnutls.so.30...(no debugging symbols found)...done. Reading symbols from /usr/lib64/liblzo2.so.2...done. Reading symbols from /usr/lib64/libspice-server.so.1...done. Reading symbols from /usr/lib64/libcacard.so.0...done. Reading symbols from /usr/lib64/libusb-1.0.so.0...(no debugging symbols found)...done. Reading symbols from /usr/lib64/libgthread-2.0.so.0...(no debugging symbols found)...done. Reading symbols from /lib64/librt.so.1...(no debugging symbols found)...done. Reading symbols from /usr/lib64/libstdc++.so.6...(no debugging symbols found)...done. Reading symbols from /lib64/libm.so.6...i(no debugging symbols found)...done. Reading symbols from /usr/lib64/libgcc_s.so.1...(no debugging symbols found)...done. Reading symbols from /lib64/libc.so.6...(no debugging symbols found)...done. Reading symbols from /lib64/ld-linux-x86-64.so.2...(no debugging symbols found)...done. Reading symbols from /lib64/libdl.so.2...(no debugging symbols found)...done. Reading symbols from /usr/lib64/libexpat.so.1...(no debugging symbols found)...done. Reading symbols from /usr/lib64/libxcb.so.1...(no debugging symbols found)...done. Reading symbols from /usr/lib64/libXau.so.6...(no debugging symbols found)...done. Reading symbols from /usr/lib64/libXdmcp.so.6...(no debugging symbols found)...done. Reading symbols from /usr/lib64/libgcrypt.so.20...(no debugging symbols found)...done. Reading symbols from /usr/lib64/libgpg-error.so.0...(no debugging symbols found)...done. Reading symbols from /usr/lib64/libidn.so.11...(no debugging symbols found)...done. Reading symbols from /usr/lib64/libssl.so.1...(no debugging symbols found)...done. Reading symbols from /usr/lib64/libcrypto.so.1...(no debugging symbols found)...done. Reading symbols from /usr/lib64/liblber-2.4.so.2...(no debugging symbols found)...done. Reading symbols from /usr/lib64/libldap-2.4.so.2...(no debugging symbols found)...done. Reading symbols from /lib64/libattr.so.1...(no debugging symbols found)...done. Reading symbols from /lib64/libresolv.so.2...(no debugging symbols found)...done. Reading symbols from /usr/lib64/libXrandr.so.2...(no debugging symbols found)...done. Reading symbols from /usr/lib64/libXrender.so.1...(no debugging symbols found)...done. Reading symbols from /usr/lib64/libvga.so.1...done. Reading symbols from /usr/lib64/../lib64/libgmodule-2.0.so.0...(no debugging symbols found)...done. Reading symbols from /usr/lib64/../lib64/libffi.so.6...(no debugging symbols found)...done. Reading symbols from /usr/lib64/../lib64/libharfbuzz.so.0...(no debugging symbols found)...done. Reading symbols from /usr/lib64/../lib64/libEGL.so.1...(no debugging symbols found)...done. Reading symbols from /usr/lib64/../lib64/libxcb-shm.so.0...(no debugging symbols found)...done. Reading symbols from /usr/lib64/../lib64/libGL.so.1...n(no debugging symbols found)...done. Reading symbols from /usr/lib64/../lib64/libglapi.so.0...(no debugging symbols found)...done. Reading symbols from /usr/lib64/../lib64/libXdamage.so.1...(no debugging symbols found)...done. Reading symbols from /usr/lib64/../lib64/libXfixes.so.3...(no debugging symbols found)...done. Reading symbols from /usr/lib64/../lib64/libX11-xcb.so.1...(no debugging symbols found)...done. Reading symbols from /usr/lib64/../lib64/libxcb-glx.so.0...(no debugging symbols found)...done. Reading symbols from /usr/lib64/../lib64/libxcb-dri2.so.0...(no debugging symbols found)...done. Reading symbols from /usr/lib64/../lib64/libxcb-dri3.so.0...(no debugging symbols found)...done. Reading symbols from /usr/lib64/../lib64/libxcb-present.so.0...(no debugging symbols found)...done. Reading symbols from /usr/lib64/../lib64/libxcb-randr.so.0...(no debugging symbols found)...done. Reading symbols from /usr/lib64/../lib64/libxcb-xfixes.so.0...(no debugging symbols found)...done. Reading symbols from /usr/lib64/../lib64/libxcb-render.so.0...(no debugging symbols found)...done. Reading symbols from /usr/lib64/../lib64/libxcb-shape.so.0...(no debugging symbols found)...done. Reading symbols from /usr/lib64/../lib64/libxcb-sync.so.1...(no debugging symbols found)...done. Reading symbols from /usr/lib64/../lib64/libxshmfence.so.1...(no debugging symbols found)...done. Reading symbols from /usr/lib64/../lib64/libXxf86vm.so.1...(no debugging symbols found)...done. Reading symbols from /usr/lib64/../lib64/libXinerama.so.1...(no debugging symbols found)...done. Reading symbols from /usr/lib64/../lib64/libXi.so.6...(no debugging symbols found)...done. Reading symbols from /usr/lib64/../lib64/libXcursor.so.1...(no debugging symbols found)...done. Reading symbols from /usr/lib64/../lib64/libXcomposite.so.1...(no debugging symbols found)...done. Reading symbols from /usr/lib64/libp11-kit.so.0...(no debugging symbols found)...done. Reading symbols from /usr/lib64/libhogweed.so.4...(no debugging symbols found)...done. Reading symbols from /usr/lib64/libgmp.so.10...(no debugging symbols found)...done. Reading symbols from /usr/lib64/libnss3.so...(no debugging symbols found)...done. Reading symbols from /usr/lib64/libsmime3.so...(no debugging symbols found)...done. Reading symbols from /usr/lib64/libssl3.so...(no debugging symbols found)...done. Reading symbols from /usr/lib64/libsoftokn3.so...(no debugging symbols found)...done. Reading symbols from /usr/lib64/libnssutil3.so...(no debugging symbols found)...done. Reading symbols from /usr/lib64/libplds4.so...(no debugging symbols found)...done. Reading symbols from /usr/lib64/libplc4.so...(no debugging symbols found)...done. Reading symbols from /usr/lib64/libnspr4.so...(no debugging symbols found)...done. Reading symbols from /usr/lib64/libsqlite3.so.0...(no debugging symbols found)...done. Reading symbols from /usr/lib64/libicui18n.so.56...(no debugging symbols found)...done. Reading symbols from /usr/lib64/libicuuc.so.56...(no debugging symbols found)...done. Reading symbols from /usr/lib64/libicudata.so.56...(no debugging symbols found)...done. Reading symbols from /usr/lib64/libcelt051.so.0...done. Reading symbols from /usr/lib64/liblz4.so.1...(no debugging symbols found)...done. Reading symbols from /lib64/libudev.so.1...(no debugging symbols found)...done. Reading symbols from /usr/lib64/sasl2/libsasldb.so.3...(no debugging symbols found)...done. Reading symbols from /usr/lib64/libgdbm.so.4...(no debugging symbols found)...done. Reading symbols from /usr/lib64/sasl2/libotp.so.3...(no debugging symbols found)...done. Reading symbols from /usr/lib64/sasl2/libdigestmd5.so.3...(no debugging symbols found)...done. Reading symbols from /usr/lib64/sasl2/libcrammd5.so.3...(no debugging symbols found)...done. Reading symbols from /usr/lib64/sasl2/liblogin.so.3...(no debugging symbols found)...done. Reading symbols from /lib64/libcrypt.so.1...(no debugging symbols found)...done. Reading symbols from /usr/lib64/sasl2/libplain.so.3...(no debugging symbols found)...done. Reading symbols from /usr/lib64/sasl2/libscram.so.3...(no debugging symbols found)...done. 0x00007f12852f83d1 in ppoll () from /lib64/libc.so.6 (gdb) continue Continuing. [Thread 0x7f115b7fe700 (LWP 5576) exited] [Thread 0x7f127aa76700 (LWP 5566) exited] [Thread 0x7f1159ffb700 (LWP 5579) exited] [Thread 0x7f115affd700 (LWP 5577) exited] [Thread 0x7f116a0e2700 (LWP 5571) exited] [Thread 0x7f1158ff9700 (LWP 5581) exited] [Thread 0x7f11690e0700 (LWP 5573) exited] [Thread 0x7f11597fa700 (LWP 5580) exited] [Thread 0x7f115bfff700 (LWP 5575) exited] [Thread 0x7f11688df700 (LWP 5574) exited] [Thread 0x7f115a7fc700 (LWP 5578) exited] [Thread 0x7f11698e1700 (LWP 5572) exited] [New Thread 0x7f11698e1700 (LWP 5631)] [New Thread 0x7f115a7fc700 (LWP 5632)] [New Thread 0x7f11688df700 (LWP 5633)] [New Thread 0x7f115bfff700 (LWP 5634)] [New Thread 0x7f127aa76700 (LWP 5635)] [New Thread 0x7f116a0e2700 (LWP 5636)] [New Thread 0x7f11690e0700 (LWP 5637)] [New Thread 0x7f115b7fe700 (LWP 5638)] [New Thread 0x7f115affd700 (LWP 5639)] [New Thread 0x7f1159ffb700 (LWP 5640)] [New Thread 0x7f11597fa700 (LWP 5641)] [New Thread 0x7f1158ff9700 (LWP 5642)] [New Thread 0x7f1117fff700 (LWP 5643)] [New Thread 0x7f11177fe700 (LWP 5644)] [New Thread 0x7f1116ffd700 (LWP 5645)] [New Thread 0x7f11167fc700 (LWP 5646)] [New Thread 0x7f1115ffb700 (LWP 5647)] [New Thread 0x7f11157fa700 (LWP 5648)] [New Thread 0x7f1114ff9700 (LWP 5649)] [New Thread 0x7f11147f8700 (LWP 5650)] [New Thread 0x7f1113ff7700 (LWP 5651)] [New Thread 0x7f11137f6700 (LWP 5652)] [New Thread 0x7f1112ff5700 (LWP 5653)] Thread 1 "qemu-system-x86" received signal SIGABRT, Aborted. 0x00007f12852323f8 in raise () from /lib64/libc.so.6 (gdb) Continuing. Couldn't get registers: No such process. Couldn't get registers: No such process. Couldn't get registers: No such process. (gdb) Continuing. Couldn't get registers: No such process. (gdb) [Thread 0x7f1112ff5700 (LWP 5653) exited] [Thread 0x7f11137f6700 (LWP 5652) exited] [Thread 0x7f1113ff7700 (LWP 5651) exited] [Thread 0x7f11147f8700 (LWP 5650) exited] [Thread 0x7f1114ff9700 (LWP 5649) exited] [Thread 0x7f11157fa700 (LWP 5648) exited] [Thread 0x7f1115ffb700 (LWP 5647) exited] [Thread 0x7f1116ffd700 (LWP 5645) exited] [Thread 0x7f11177fe700 (LWP 5644) exited] [Thread 0x7f1117fff700 (LWP 5643) exited] [Thread 0x7f1158ff9700 (LWP 5642) exited] [Thread 0x7f11597fa700 (LWP 5641) exited] [Thread 0x7f1159ffb700 (LWP 5640) exited] [Thread 0x7f115affd700 (LWP 5639) exited] [Thread 0x7f115b7fe700 (LWP 5638) exited] [Thread 0x7f11690e0700 (LWP 5637) exited] [Thread 0x7f116a0e2700 (LWP 5636) exited] [Thread 0x7f127aa76700 (LWP 5635) exited] [Thread 0x7f115bfff700 (LWP 5634) exited] [Thread 0x7f11688df700 (LWP 5633) exited] [Thread 0x7f115a7fc700 (LWP 5632) exited] [Thread 0x7f11698e1700 (LWP 5631) exited] [Thread 0x7f1134ff9700 (LWP 5588) exited] [Thread 0x7f11357fa700 (LWP 5587) exited] [Thread 0x7f1135ffb700 (LWP 5586) exited] [Thread 0x7f11367fc700 (LWP 5585) exited] [Thread 0x7f1136ffd700 (LWP 5584) exited] [Thread 0x7f11377fe700 (LWP 5583) exited] [Thread 0x7f1137fff700 (LWP 5582) exited] [Thread 0x7f1272dff700 (LWP 5570) exited] [Thread 0x7f1278961700 (LWP 5568) exited] [Thread 0x7f1279162700 (LWP 5567) exited] [Thread 0x7f127b277700 (LWP 5564) exited] [Thread 0x7f128d35cb00 (LWP 5563) exited] Continuing. Cannot execute this command without a live selected thread. (gdb) Continuing. Cannot execute this command without a live selected thread. (gdb) Continuing. Cannot execute this command without a live selected thread. (gdb) -- You received this bug notification because you are a member of qemu- devel-ml, which is subscribed to QEMU. https://bugs.launchpad.net/bugs/1570134 Title: While committing snapshot qemu crashes with SIGABRT Status in QEMU: New Bug description: Information: OS: Slackware64-Current Compiled with: gcc version 5.3.0 (GCC) / glibc 2.23 Compiled using: CFLAGS="-O2 -fPIC" \ CXXFLAGS="-O2 -fPIC" \ LDFLAGS="-L/usr/lib64" \ ./configure \ --prefix=/usr \ --sysconfdir=/etc \ --localstatedir=/var \ --libdir=/usr/lib64 \ --enable-spice \ --enable-kvm \ --enable-glusterfs \ --enable-libiscsi \ --enable-libusb \ --target-list=x86_64-softmmu,i386-softmmu \ --enable-debug Source: qemu-2.5.1.tar.bz2 Running as: /usr/bin/qemu-system-x86_64 -name test1,debug-threads=on -S -machine pc-1.1,accel=kvm,usb=off -m 4096 -realtime mlock=off -smp 2,sockets=2,cores=1,threads=1 -uuid 4b30ec13-6609-4a56-8731-d400c38189ef -no-user-config -nodefaults -chardev socket,id=charmonitor,path=/var/lib/libvirt/qemu/domain-4-test1/monitor.sock,server,nowait -mon chardev=charmonitor,id=monitor,mode=control -rtc base=localtime,clock=vm,driftfix=slew -global kvm- pit.lost_tick_policy=discard -no-shutdown -boot strict=on -device piix3-usb-uhci,id=usb,bus=pci.0,addr=0x1.0x2 -drive file=/datastore/vm/test1/test1.img,format=qcow2,if=none,id=drive- virtio-disk0 -device virtio-blk-pci,scsi=off,bus=pci.0,addr=0x4,drive =drive-virtio-disk0,id=virtio-disk0,bootindex=2 -drive if=none,id =drive-ide0-1-0,readonly=on -device ide-cd,bus=ide.1,unit=0,drive =drive-ide0-1-0,id=ide0-1-0,bootindex=1 -netdev tap,fd=23,id=hostnet0,vhost=on,vhostfd=25 -device virtio-net pci,netdev=hostnet0,id=net0,mac=52:54:00:66:2e:0f,bus=pci.0,addr=0x3 -vnc 0.0.0.0:0 -device cirrus-vga,id=video0,bus=pci.0,addr=0x2 -device virtio-balloon-pci,id=balloon0,bus=pci.0,addr=0x5 -msg timestamp=on File system: zfs v0.6.5.6 While running: virsh blockcommit test1 vda --active --pivot --verbose VM running very heavy IO load GDB reporting: #0 0x00007fd80132c3f8 in raise () at /lib64/libc.so.6 #1 0x00007fd80132dffa in abort () at /lib64/libc.so.6 #2 0x00007fd801324c17 in __assert_fail_base () at /lib64/libc.so.6 #3 0x00007fd801324cc2 in () at /lib64/libc.so.6 #4 0x000055d9918d7572 in bdrv_replace_in_backing_chain (old=0x55d993ed9c10, new=0x55d9931ccc10) at block.c:2096 __PRETTY_FUNCTION__ = "bdrv_replace_in_backing_chain" #5 0x000055d991911869 in mirror_exit (job=0x55d993fef830, opaque=0x55d999bbefe0) at block/mirror.c:376 to_replace = 0x55d993ed9c10 s = 0x55d993fef830 data = 0x55d999bbefe0 replace_aio_context = <optimized out> src = 0x55d993ed9c10 #6 0x000055d9918da1dc in block_job_defer_to_main_loop_bh (opaque=0x55d9940ce850) at blockjob.c:481 data = 0x55d9940ce850 aio_context = 0x55d9931a2610 #7 0x000055d9918d014b in aio_bh_poll (ctx=ctx@entry=0x55d9931a2610) at async.c:92 bh = <optimized out> bhp = <optimized out> next = 0x55d99440f910 ret = 1 #8 0x000055d9918dc8c0 in aio_dispatch (ctx=0x55d9931a2610) at aio-posix.c:305 node = <optimized out> progress = false #9 0x000055d9918d000e in aio_ctx_dispatch (source=<optimized out>, callback=<optimized out>, user_data=<optimized out>) at async.c:231 ctx = <optimized out> #10 0x00007fd8037cf787 in g_main_context_dispatch () at /usr/lib64/libglib-2.0.so.0 #11 0x000055d9918db03b in main_loop_wait () at main-loop.c:211 context = 0x55d9931a3200 pfds = <optimized out> ret = 0 spin_counter = 1 ret = 0 timeout = 4294967295 timeout_ns = <optimized out> #12 0x000055d9918db03b in main_loop_wait (timeout=<optimized out>) at main-loop.c:256 ret = 0 spin_counter = 1 ret = 0 timeout = 4294967295 timeout_ns = <optimized out> #13 0x000055d9918db03b in main_loop_wait (nonblocking=<optimized out>) at main-loop.c:504 ret = 0 timeout = 4294967295 timeout_ns = <optimized out> #14 0x000055d991679cc4 in main () at vl.c:1923 nonblocking = <optimized out> last_io = 2 i = <optimized out> snapshot = <optimized out> linux_boot = <optimized out> initrd_filename = <optimized out> kernel_filename = <optimized out> kernel_cmdline = <optimized out> boot_order = <optimized out> boot_once = <optimized out> ds = <optimized out> cyls = <optimized out> heads = <optimized out> secs = <optimized out> translation = <optimized out> hda_opts = <optimized out> opts = <optimized out> machine_opts = <optimized out> icount_opts = <optimized out> olist = <optimized out> optind = 49 optarg = 0x7fffc6d27f43 "timestamp=on" loadvm = <optimized out> machine_class = 0x55d993194d10 cpu_model = <optimized out> vga_model = 0x0 qtest_chrdev = <optimized out> qtest_log = <optimized out> pid_file = <optimized out> incoming = <optimized out> defconfig = <optimized out> userconfig = false log_mask = <optimized out> log_file = <optimized out> trace_events = <optimized out> trace_file = <optimized out> maxram_size = <optimized out> ram_slots = <optimized out> vmstate_dump_file = <optimized out> main_loop_err = 0x0 err = 0x0 __func__ = "main" #15 0x000055d991679cc4 in main (argc=<optimized out>, argv=<optimized out>, envp=<optimized out>) at vl.c:4699 i = <optimized out> snapshot = <optimized out> linux_boot = <optimized out> initrd_filename = <optimized out> kernel_filename = <optimized out> kernel_cmdline = <optimized out> boot_order = <optimized out> boot_once = <optimized out> ds = <optimized out> cyls = <optimized out> heads = <optimized out> secs = <optimized out> translation = <optimized out> hda_opts = <optimized out> opts = <optimized out> machine_opts = <optimized out> icount_opts = <optimized out> olist = <optimized out> optind = 49 optarg = 0x7fffc6d27f43 "timestamp=on" loadvm = <optimized out> machine_class = 0x55d993194d10 cpu_model = <optimized out> vga_model = 0x0 qtest_chrdev = <optimized out> qtest_log = <optimized out> pid_file = <optimized out> incoming = <optimized out> defconfig = <optimized out> userconfig = false log_mask = <optimized out> log_file = <optimized out> trace_events = <optimized out> trace_file = <optimized out> maxram_size = <optimized out> ram_slots = <optimized out> vmstate_dump_file = <optimized out> main_loop_err = 0x0 err = 0x0 __func__ = "main" I can reproduce this at will, and can provide more information per a dev's request. 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