Hi,
I ran following command,
/root/prototypes/qemu/x86_64-softmmu/qemu-system-x86_64 --enable-kvm -cpu
host -m 1024 -hda /var/opt/kvm/img/win7.img -drive
if=none,id=drive1,cache=none,format=raw,aio=native,file=cvbd://
127.0.0.1:6380/win7.img\?block_size=4096 -device virtio-blk,drive=drive1
-vnc :0
When tried to connect to VNC server at 127.0.0.1:5900 it said connection
closed. When I try to run the same command under gdb I found that there is
no thread running VNC server,
(gdb) thread apply all bt
Thread 4 (Thread 0x7ffff48c1700 (LWP 68795)):
#0 pthread_cond_wait@@GLIBC_2.3.2 () at
../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1 0x00005555558f2df9 in qemu_cond_wait (cond=<optimized out>,
mutex=mutex@entry=0x555555dc35c0 <qemu_global_mutex>) at
util/qemu-thread-posix.c:132
#2 0x0000555555628f5b in qemu_kvm_wait_io_event (cpu=<optimized out>) at
/root/prototypes/qemu/cpus.c:945
#3 qemu_kvm_cpu_thread_fn (arg=0x55555625fb90) at
/root/prototypes/qemu/cpus.c:984
#4 0x00007ffff64b6182 in start_thread (arg=0x7ffff48c1700) at
pthread_create.c:312
#5 0x00007ffff61e347d in clone () at
../sysdeps/unix/sysv/linux/x86_64/clone.S:111
Thread 2 (Thread 0x7ffff5ba6700 (LWP 68793)):
#0 __lll_lock_wait () at
../nptl/sysdeps/unix/sysv/linux/x86_64/lowlevellock.S:135
#1 0x00007ffff64b8657 in _L_lock_909 () from
/lib/x86_64-linux-gnu/libpthread.so.0
#2 0x00007ffff64b8480 in __GI___pthread_mutex_lock (mutex=0x555555dc35c0
<qemu_global_mutex>) at ../nptl/pthread_mutex_lock.c:79
#3 0x00005555558f2bd9 in qemu_mutex_lock (mutex=mutex@entry=0x555555dc35c0
<qemu_global_mutex>) at util/qemu-thread-posix.c:73
#4 0x0000555555628e74 in qemu_mutex_lock_iothread () at
/root/prototypes/qemu/cpus.c:1170
#5 0x00005555559030ae in call_rcu_thread (opaque=<optimized out>) at
util/rcu.c:243
#6 0x00007ffff64b6182 in start_thread (arg=0x7ffff5ba6700) at
pthread_create.c:312
#7 0x00007ffff61e347d in clone () at
../sysdeps/unix/sysv/linux/x86_64/clone.S:111
Thread 1 (Thread 0x7ffff7fdfa80 (LWP 68789)):
#0 0x00007ffff61d61ef in __GI_ppoll (fds=0x5555562455e0, nfds=1,
timeout=<optimized out>, timeout@entry=0x0, sigmask=sigmask@entry=0x0) at
../sysdeps/unix/sysv/linux/ppoll.c:56
#1 0x0000555555875cbb in ppoll (__ss=0x0, __timeout=0x0, __nfds=<optimized
out>, __fds=<optimized out>) at
/usr/include/x86_64-linux-gnu/bits/poll2.h:77
#2 qemu_poll_ns (fds=<optimized out>, nfds=<optimized out>,
timeout=timeout@entry=-1) at qemu-timer.c:310
#3 0x0000555555877111 in aio_poll (ctx=ctx@entry=0x555556228550,
blocking=blocking@entry=true) at aio-posix.c:271
#4 0x00005555558b029d in bdrv_prwv_co (bs=bs@entry=0x5555562490b0,
offset=offset@entry=0, qiov=qiov@entry=0x7fffffffd8b0,
is_write=is_write@entry=false, flags=flags@entry=(unknown: 0)) at
block/io.c:562
#5 0x00005555558b0393 in bdrv_rw_co (bs=bs@entry=0x5555562490b0,
sector_num=sector_num@entry=0, buf=buf@entry=0x7fffffffd940 "A&",
nb_sectors=nb_sectors@entry=1, is_write=is_write@entry=false,
flags=flags@entry=(unknown: 0))
at block/io.c:585
#6 0x00005555558b0432 in bdrv_read (nb_sectors=1, buf=0x7fffffffd940 "A&",
sector_num=0, bs=0x5555562490b0) at block/io.c:593
#7 bdrv_read_unthrottled (bs=0x5555562490b0, sector_num=sector_num@entry=0,
buf=buf@entry=0x7fffffffd940 "A&", nb_sectors=nb_sectors@entry=1) at
block/io.c:605
#8 0x00005555558a420d in blk_read_unthrottled (blk=blk@entry=0x555556249060,
sector_num=sector_num@entry=0, buf=buf@entry=0x7fffffffd940 "A&",
nb_sectors=nb_sectors@entry=1) at block/block-backend.c:504
#9 0x00005555557552ef in guess_disk_lchs (blk=blk@entry=0x555556249060,
pcylinders=pcylinders@entry=0x7fffffffdb8c, pheads=pheads@entry=0x7fffffffdb90,
psectors=psectors@entry=0x7fffffffdb94) at hw/block/hd-geometry.c:68
#10 0x0000555555755447 in hd_geometry_guess (blk=0x555556249060,
pcyls=pcyls@entry=0x5555579b3f54, pheads=pheads@entry=0x5555579b3f58,
psecs=psecs@entry=0x5555579b3f5c, ptrans=ptrans@entry=0x0) at
hw/block/hd-geometry.c:133
#11 0x0000555555754f72 in blkconf_geometry (conf=conf@entry=0x5555579b3f38,
ptrans=ptrans@entry=0x0, cyls_max=cyls_max@entry=65535,
heads_max=heads_max@entry=255, secs_max=secs_max@entry=255, errp=errp@entry
=0x7fffffffdc60)
at hw/block/block.c:71
#12 0x00005555556548be in virtio_blk_device_realize (dev=0x5555579b3e30,
errp=0x7fffffffdcb0) at /root/prototypes/qemu/hw/block/virtio-blk.c:906
#13 0x000055555567b4bb in virtio_device_realize (dev=0x5555579b3e30,
errp=0x7fffffffdcf0) at /root/prototypes/qemu/hw/virtio/virtio.c:1574
#14 0x000055555576d29d in device_set_realized (obj=0x5555579b3e30,
value=<optimized out>, errp=0x7fffffffde80) at hw/core/qdev.c:1046
#15 0x000055555583a1ae in property_set_bool (obj=0x5555579b3e30,
v=<optimized out>, opaque=0x555557659bc0, name=<optimized out>,
errp=0x7fffffffde80) at qom/object.c:1667
#16 0x000055555583df77 in object_property_set_qobject (obj=0x5555579b3e30,
value=<optimized out>, name=0x55555593744d "realized", errp=0x7fffffffde80)
at qom/qom-qobject.c:24
#17 0x000055555583bf50 in object_property_set_bool (obj=0x5555579b3e30,
value=<optimized out>, name=0x55555593744d "realized", errp=0x7fffffffde80)
at qom/object.c:1015
#18 0x0000555555823986 in virtio_pci_realize (pci_dev=<optimized out>,
errp=0x7fffffffde80) at hw/virtio/virtio-pci.c:1593
#19 0x00005555557d663f in pci_qdev_realize (qdev=0x5555579abd10,
errp=0x7fffffffdf00) at hw/pci/pci.c:1842
#20 0x000055555576d29d in device_set_realized (obj=0x5555579abd10,
value=<optimized out>, errp=0x7fffffffe058) at hw/core/qdev.c:1046
#21 0x000055555583a1ae in property_set_bool (obj=0x5555579abd10,
v=<optimized out>, opaque=0x555557658ef0, name=<optimized out>,
errp=0x7fffffffe058) at qom/object.c:1667
#22 0x000055555583df77 in object_property_set_qobject (obj=0x5555579abd10,
value=<optimized out>, name=0x55555593744d "realized", errp=0x7fffffffe058)
at qom/qom-qobject.c:24
#23 0x000055555583bf50 in object_property_set_bool
(obj=obj@entry=0x5555579abd10,
value=value@entry=true, name=name@entry=0x55555593744d "realized",
errp=errp@entry=0x7fffffffe058) at qom/object.c:1015
#24 0x0000555555705e21 in qdev_device_add (opts=0x5555562280e0,
errp=0x7fffffffe130) at qdev-monitor.c:599
#25 0x00005555557107b7 in device_init_func (opaque=<optimized out>,
opts=<optimized out>, errp=<optimized out>) at vl.c:2300
#26 0x0000555555900baa in qemu_opts_foreach (list=<optimized out>,
func=0x555555710790 <device_init_func>, opaque=0x0, errp=0x0) at
util/qemu-option.c:1089
#27 0x00005555555f587a in main (argc=<optimized out>, argv=<optimized out>,
envp=<optimized out>) at vl.c:4532
Please help.
Thanks,
Darshan
