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Diffstat (limited to 'results/classifier/deepseek-2-tmp/output/other/1788582')
| -rw-r--r-- | results/classifier/deepseek-2-tmp/output/other/1788582 | 68 |
1 files changed, 0 insertions, 68 deletions
diff --git a/results/classifier/deepseek-2-tmp/output/other/1788582 b/results/classifier/deepseek-2-tmp/output/other/1788582 deleted file mode 100644 index 57dbecec..00000000 --- a/results/classifier/deepseek-2-tmp/output/other/1788582 +++ /dev/null @@ -1,68 +0,0 @@ - -Race condition during shutdown - -I ran into a bug when I started several VMs in parallel using -libvirt. The VMs are using only a kernel and a initrd (which includes a -minimal OS). The guest OS itself does a 'poweroff -f' as soon as the -login prompt shows up. So the expectaction is that the VMs will start, -the shutdown will be initiated, and the QEMU processes will then -end. But instead some of the QEMU processes get stuck in ppoll(). - -A bisect showed that the first bad commit was -0f12264e7a41458179ad10276a7c33c72024861a ("block: Allow graph changes in -bdrv_drain_all_begin/end sections"). - -I've already tried the current master (13b7b188501d419a7d63c016e00065bcc693b7d4) -since the problem might be related -to the commit a1405acddeb0af6625dd9c30e8277b08e0885bd3 ("aio: Do -aio_notify_accept only during blocking aio_poll"). But the bug is still -there. I’ve reproduced the bug on x86_64 and on s390x. - -The backtrace of a hanging QEMU process: - -(gdb) bt -#0 0x00007f5d0e251b36 in ppoll () from target:/lib64/libc.so.6 -#1 0x0000560191052014 in qemu_poll_ns (fds=0x560193b23d60, nfds=5, timeout=55774838936000) at /home/user/git/qemu/util/qemu-timer.c:334 -#2 0x00005601910531fa in os_host_main_loop_wait (timeout=55774838936000) at /home/user/git/qemu/util/main-loop.c:233 -#3 0x0000560191053119 in main_loop_wait (nonblocking=0) at /home/user/git/qemu/util/main-loop.c:497 -#4 0x0000560190baf454 in main_loop () at /home/user/git/qemu/vl.c:1866 -#5 0x0000560190baa552 in main (argc=71, argv=0x7ffde10e41c8, envp=0x7ffde10e4408) at /home/user/git/qemu/vl.c:4644 - -The used domain definition is: - -<domain type='kvm'> - <name>test</name> - <memory unit='KiB'>716800</memory> - <vcpu placement='static'>2</vcpu> - <iothreads>8</iothreads> - <os> - <type arch='x86_64' machine='pc-i440fx-3.0'>hvm</type> - <kernel>/var/lib/libvirt/images/vmlinuz-4.14.13-200.fc26.x86_64</kernel> - <initrd>/var/lib/libvirt/images/test-image-qemux86_64+modules-4.14.13-200.fc26.x86_64.cpio.gz</initrd> - <cmdline>console=hvc0 STARTUP=shutdown.sh</cmdline> - <boot dev='hd'/> - </os> - <features> - <acpi/> - </features> - <clock offset='utc'/> - <on_poweroff>destroy</on_poweroff> - <on_reboot>restart</on_reboot> - <on_crash>preserve</on_crash> - <devices> - <emulator>/usr/local/qemu/master/bin/qemu-system-x86_64</emulator> - <controller type='usb' index='0' model='piix3-uhci'> - <address type='pci' domain='0x0000' bus='0x00' slot='0x01' function='0x2'/> - </controller> - <controller type='pci' index='0' model='pci-root'/> - <controller type='virtio-serial' index='0'> - <address type='pci' domain='0x0000' bus='0x00' slot='0x02' function='0x0'/> - </controller> - <console type='pty'> - <target type='virtio' port='0'/> - </console> - <input type='mouse' bus='ps2'/> - <input type='keyboard' bus='ps2'/> - <memballoon model='none'/> - </devices> -</domain>
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