Re: [Qemu-devel] Crash when booting KDE Neon using qxl-vga

[Dr. David Alan Gilbert]

* Leonardo Soares Müller (address@hidden) wrote:
> libspice-server1 on host: 0.14.0-1ubuntu2.2
> spice-vdagent (the only package) on guest: 0.17.0-1ubuntu2
> Guest kernel version: 4.15.0-44-generic

Hmm, I'm also getting a crash, but I think it's very different from
yours:

./x86_64-softmmu/qemu-system-x86_64 -M pc,accel=kvm -smp 3 -m 8G -cdrom 
/home/vmimages/neon-useredition-current.iso -drive 
if=virtio,file=/home/vmimages/kde-neon.qcow2 -vga qxl

kvm_mem_ioeventfd_add: error adding ioeventfd: No space left on device
Aborted (core dumped)

#2  0x0000555555893ee6 in kvm_mem_ioeventfd_add (listener=<optimized out>, 
section=0x7fffdbffb9d0, match_data=<optimized out>, data=0, e=<optimized out>)
    at /home/dgilbert/git/qemu/accel/kvm/kvm-all.c:866
#3  0x000055555588123d in address_space_add_del_ioeventfds
    (fds_old_nb=0, fds_old=0x0, fds_new_nb=1, fds_new=0x7fffd0944570, 
as=0x5555563bbea0 <address_space_memory>) at 
/home/dgilbert/git/qemu/memory.c:793
#4  0x000055555588123d in address_space_update_ioeventfds (address@hidden 
<address_space_memory>) at /home/dgilbert/git/qemu/memory.c:843
#5  0x00005555558816c8 in memory_region_transaction_commit () at 
/home/dgilbert/git/qemu/memory.c:1087
#6  0x00005555558816c8 in memory_region_transaction_commit () at 
/home/dgilbert/git/qemu/memory.c:1071
#7  0x0000555555aab425 in pci_update_mappings (address@hidden) at 
/home/dgilbert/git/qemu/hw/pci/pci.c:1357
#8  0x0000555555aaba89 in pci_default_write_config (address@hidden, 
address@hidden, val_in=263, address@hidden)
    at /home/dgilbert/git/qemu/hw/pci/pci.c:1413
#9  0x0000555555b216c1 in virtio_write_config (pci_dev=0x555557617ce0, 
address=4, val=<optimized out>, len=2)
    at /home/dgilbert/git/qemu/hw/virtio/virtio-pci.c:598
#10 0x0000555555ab26bf in pci_host_config_write_common (pci_dev=0x555557617ce0, 
addr=4, limit=<optimized out>, val=263, len=2)
    at /home/dgilbert/git/qemu/hw/pci/pci_host.c:87
#11 0x000055555587f721 in memory_region_write_accessor
    (mr=0x555556a0bf80, addr=0, value=<optimized out>, size=2, shift=<optimized 
out>, mask=<optimized out>, attrs=...)
    at /home/dgilbert/git/qemu/memory.c:502
#12 0x000055555587d276 in access_with_adjusted_size
    (address@hidden, address@hidden, address@hidden, access_size_min=<optimized 
out>, access_size_max=<optimized out>, address@hidden 
<memory_region_write_accessor>, mr=0x555556a0bf80, attrs=...) at 
/home/dgilbert/git/qemu/memory.c:568
#13 0x0000555555881bfc in memory_region_dispatch_write (address@hidden, addr=0, 
data=<optimized out>, size=2, address@hidden)
    at /home/dgilbert/git/qemu/memory.c:1499
#14 0x0000555555828923 in flatview_write_continue
    (address@hidden, address@hidden, attrs=..., address@hidden "\a\001", 
address@hidden, addr1=<optimized out>, l=<optimized out>, mr=0x555556a0bf80) at 
/home/dgilbert/git/qemu/exec.c:3247
#15 0x0000555555828b49 in flatview_write (fv=0x7fffd0847c00, addr=3324, 
attrs=..., buf=0x7ffff7fc5000 "\a\001", len=2)
    at /home/dgilbert/git/qemu/exec.c:3286
#16 0x000055555582cc7f in address_space_write (as=<optimized out>, 
address@hidden, attrs=..., buf=<optimized out>, address@hidden)
    at /home/dgilbert/git/qemu/exec.c:3376
#17 0x000055555582cd0a in address_space_rw (as=<optimized out>, address@hidden, 
attrs=..., 
    address@hidden, buf=<optimized out>, address@hidden, address@hidden) at 
/home/dgilbert/git/qemu/exec.c:3387
#18 0x0000555555894e45 in kvm_handle_io (count=1, size=2, direction=<optimized 
out>, data=<optimized out>, attrs=..., port=3324)
    at /home/dgilbert/git/qemu/accel/kvm/kvm-all.c:1775
#19 0x0000555555894e45 in kvm_cpu_exec (address@hidden) at 
/home/dgilbert/git/qemu/accel/kvm/kvm-all.c:2021
#20 0x000055555586a6be in qemu_kvm_cpu_thread_fn (arg=0x55555670f6f0) at 
/home/dgilbert/git/qemu/cpus.c:1281
#21 0x000055555586a6be in qemu_kvm_cpu_thread_fn (address@hidden) at 
/home/dgilbert/git/qemu/cpus.c:1254
#22 0x0000555555ca0e7a in qemu_thread_start (args=<optimized out>) at 
/home/dgilbert/git/qemu/util/qemu-thread-posix.c:502
#23 0x00007ffff536258e in start_thread () at /lib64/libpthread.so.0

(gdb) p section->offset_within_address_space
$3 = 4273991680
(gdb) p/x section->offset_within_address_space
$4 = 0xfebff000
(gdb) p section
$5 = (MemoryRegionSection *) 0x7fffdbffb9d0
(gdb) p *section
$6 = {mr = 0x0, fv = 0x7fffd08fe680, offset_within_region = 0, size = 0, 
offset_within_address_space = 4273991680, readonly = false, nonvolatile = false}

Dave

> > 
> > OK, great;  can can you confirm the version of the spice packages
> > on both the guest and host, and the kernel on the guest.
> > 
> > Dave
> > 
> > --
> > Dr. David Alan Gilbert / address@hidden / Manchester, UK
> > 
--
Dr. David Alan Gilbert / address@hidden / Manchester, UK