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Bug 1206030 - qemu coredump when boot with more qxl-vga device
Summary: qemu coredump when boot with more qxl-vga device
Keywords:
Status: CLOSED WONTFIX
Alias: None
Product: Red Hat Enterprise Linux 6
Classification: Red Hat
Component: qemu-kvm
Version: 6.7
Hardware: Unspecified
OS: Unspecified
low
low
Target Milestone: rc
: ---
Assignee: Gerd Hoffmann
QA Contact: Virtualization Bugs
URL:
Whiteboard:
Depends On: 1171942
Blocks: 1206037
TreeView+ depends on / blocked
 
Reported: 2015-03-26 07:31 UTC by Sibiao Luo
Modified: 2015-04-27 12:50 UTC (History)
14 users (show)

Fixed In Version:
Doc Type: Bug Fix
Doc Text:
Clone Of: 1171942
: 1206037 (view as bug list)
Environment:
Last Closed: 2015-04-27 12:50:03 UTC
Target Upstream Version:
Embargoed:

Attachments (Terms of Use)

Comment 1 Sibiao Luo 2015-03-26 07:32:54 UTC 
host info:
# uname -r && rpm -q qemu-kvm-rhev
2.6.32-546.el6.x86_64
qemu-kvm-rhev-0.12.1.2-2.458.el6.x86_64

# /usr/libexec/qemu-kvm -name rhel7.2 -M pc -m 4G -cpu Opteron_G3,check -smp 4,sockets=4,cores=1,threads=1,maxcpus=4 -rtc base=utc,driftfix=slew -vga qxl -spice port=8000,disable-ticketing -device qxl-vga -monitor stdio
warning: host cpuid 0000_0001:ecx lacks requested flag 'monitor' [0x00000008]
warning: host cpuid 8000_0001:ecx flag restricted to guest 'svm' [0x00000004]
warning: host cpuid 0000_0001:ecx lacks requested flag 'monitor' [0x00000008]
warning: host cpuid 8000_0001:ecx flag restricted to guest 'svm' [0x00000004]
warning: host cpuid 0000_0001:ecx lacks requested flag 'monitor' [0x00000008]
warning: host cpuid 8000_0001:ecx flag restricted to guest 'svm' [0x00000004]
warning: host cpuid 0000_0001:ecx lacks requested flag 'monitor' [0x00000008]
warning: host cpuid 8000_0001:ecx flag restricted to guest 'svm' [0x00000004]
RAMBlock "vga.vram" already registered, abort!
Aborted (core dumped)

Core was generated by `/usr/libexec/qemu-kvm -name rhel7.2 -M pc -m 4G -cpu Opteron_G3,check -smp 4,so'.
Program terminated with signal 6, Aborted.
#0  0x00007f50b70d3625 in raise () from /lib64/libc.so.6

(gdb) bt
#0  0x00007f50b70d3625 in raise () from /lib64/libc.so.6
#1  0x00007f50b70d4e05 in abort () from /lib64/libc.so.6
#2  0x00007f50bb7dc434 in find_ram_offset (dev=<value optimized out>, name=<value optimized out>, size=<value optimized out>, host=<value optimized out>)
    at /usr/src/debug/qemu-kvm-0.12.1.2/exec.c:2687
#3  qemu_ram_alloc_from_ptr (dev=<value optimized out>, name=<value optimized out>, size=<value optimized out>, host=<value optimized out>)
    at /usr/src/debug/qemu-kvm-0.12.1.2/exec.c:2806
#4  0x00007f50bb88bf9d in vga_common_init (s=0x7f50bece8838, vga_ram_size=67108864) at /usr/src/debug/qemu-kvm-0.12.1.2/hw/vga.c:2298
#5  0x00007f50bb8bd842 in qxl_init_primary (dev=0x7f50bece62a0) at /usr/src/debug/qemu-kvm-0.12.1.2/hw/qxl.c:2049
#6  0x00007f50bb713536 in pci_qdev_init (qdev=0x7f50bece62a0, base=0x7f50bbc45d40) at /usr/src/debug/qemu-kvm-0.12.1.2/hw/pci.c:1659
#7  0x00007f50bb7a01a8 in qdev_init (dev=0x7f50bece62a0) at /usr/src/debug/qemu-kvm-0.12.1.2/hw/qdev.c:285
#8  0x00007f50bb7a05bf in qdev_device_add (opts=0x7f50bd8401f0) at /usr/src/debug/qemu-kvm-0.12.1.2/hw/qdev.c:260
#9  0x00007f50bb7010e9 in device_init_func (opts=<value optimized out>, opaque=<value optimized out>) at /usr/src/debug/qemu-kvm-0.12.1.2/vl.c:4803
#10 0x00007f50bb739f2a in qemu_opts_foreach (list=<value optimized out>, func=0x7f50bb7010e0 <device_init_func>, opaque=0x0, abort_on_failure=<value optimized out>)
    at /usr/src/debug/qemu-kvm-0.12.1.2/qemu-option.c:1084
#11 0x00007f50bb705cfc in main (argc=<value optimized out>, argv=<value optimized out>, envp=<value optimized out>) at /usr/src/debug/qemu-kvm-0.12.1.2/vl.c:6539
(gdb)
Comment 2 Gerd Hoffmann 2015-03-30 07:58:07 UTC 
Multiple vga devices is not supported.
Use -device qxl not qxl-vga for a second qxl device.

The error handling could be more elegant,
but this is not important enough to be fixed for RHEL-6.
Comment 3 Gerd Hoffmann 2015-04-27 12:50:03 UTC 
see comment #2
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