KVM console dying

[Marcelo Tosatti <mtosatti@redhat.com>]

From: Alan Pevec <apevec@redhat.com>

> - add serial console, workaround for F9 livecd KVM guest dying with 
> standard console only.
>  VNC console will go blank but node will continue to boot

With only console=tty qemu-kvm dies when, AFAICT from udevdebug output, start_udev is processing console rules.

Here is backtrace:

Program received signal SIGSEGV, Segmentation fault.

[Switching to Thread -1208993168 (LWP 16163)]

0x0095337d in memmove () from /lib/libc.so.6

Missing separate debuginfos, use: debuginfo-install SDL.i386 alsa-lib.i386 glibc.i686 gnutls.i386 libgcrypt.i386 libgpg-error.i386 zlib.i386

(gdb) bt

#0  0x0095337d in memmove () from /lib/libc.so.6

#1  0x080b38ae in vnc_copy (ds=0x8181060, src_x=64, src_y=416, dst_x=64, 

    dst_y=400, w=72, h=16) at vnc.c:465

#2  0x080947ec in cirrus_bitblt_start (s=0xa2181e0)

    at /usr/src/debug/kvm-60/qemu/hw/cirrus_vga.c:760

#3  0x08095008 in cirrus_hook_write_gr (s=0xa2181e0, reg_index=2534224968, 

    reg_value=2) at /usr/src/debug/kvm-60/qemu/hw/cirrus_vga.c:1064

#4  0x08095bb9 in vga_ioport_write (opaque=0xa2181e0, addr=975, val=2)

    at /usr/src/debug/kvm-60/qemu/hw/cirrus_vga.c:2958

#5  0x080d3277 in kvm_outw (opaque=0x0, addr=3072, data=<value optimized out>)

    at /usr/src/debug/kvm-60/qemu/qemu-kvm.c:478

#6  0x0814b643 in kvm_run (kvm=0xa0de028, vcpu=0) at libkvm.c:719

#7  0x080d2bf2 in kvm_cpu_exec (env=0xa1085e0)

    at /usr/src/debug/kvm-60/qemu/qemu-kvm.c:143

#8  0x080d36d2 in kvm_main_loop_cpu (env=0xa1085e0)

    at /usr/src/debug/kvm-60/qemu/qemu-kvm.c:343

#9  0x08057cf8 in main (argc=20, argv=0xbfc42914)

    at /usr/src/debug/kvm-60/qemu/vl.c:7817

#10 0x008f8390 in __libc_start_main () from /lib/libc.so.6

#11 0x0804ce21 in _start ()


VNC server bug? Can QEMU/KVM experts have a look? Any other hints?

My host is F8, kernel-2.6.24.4-64.fc8 kvm-60-3.fc8 libvirt-0.4.1-3.fc8.

Thanks!

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