[Xen-devel] vm crashed due to signal 11

[jbuy0710 <juby0710@xxxxxxxxx>]

Hi ,

Besides signal 7 crash, we also encounter a signal 11 crash in our
enviroment with xen 4.0.1 .
We start about 10~15 VMs at the same time and stop them after about 15
minutes repeately.

The xml file of our VMs is like this
<domain type='xen' id='274'>
 <name>45087c07-c929-4e41-bc11-215fa7088ee5</name>
 <uuid>45087c07-c929-4e41-bc11-215fa7088ee5</uuid>
 <memory>256000</memory>
 <currentMemory>256000</currentMemory>
 <vcpu cpuset='1-3'>1</vcpu>
 <os>
   <type>hvm</type>
   <loader>/usr/lib/xen/boot/hvmloader</loader>
   <boot dev='hd'/>
 </os>
 <features>
   <acpi/>
   <apic/>
   <pae/>
 </features>
 <clock offset='utc'/>
 <on_poweroff>destroy</on_poweroff>
 <on_reboot>restart</on_reboot>
 <on_crash>destroy</on_crash>
 <devices>
   <emulator>/usr/lib64/xen/bin/qemu-dm</emulator>
   <disk type='file' device='disk'>
     <driver name='file'/>
     <source file='/07dbc62b-3bd7-41d7-865a-6632019e2f2b'/>
     <target dev='hda' bus='ide'/>
   </disk>
   <interface type='bridge'>
     <mac address='00:16:3e:00:01:00'/>
     <source bridge='teprod'/>
     <script path='/etc/xen/scripts/vif-bridge'/>
     <target dev='vif274.0'/>
     <model type='e1000'/>
   </interface>
   <serial type='pty'>
     <source path='/dev/pts/3'/>
     <target port='0'/>
   </serial>
   <console type='pty' tty='/dev/pts/3'>
     <source path='/dev/pts/3'/>
     <target type='serial' port='0'/>
   </console>
   <input type='tablet' bus='usb'/>
   <input type='mouse' bus='ps2'/>
   <graphics type='vnc' port='5903' autoport='yes' keymap='en-us'/>
 </devices>
</domain>


We try to use the core dump file of qemu-dm and gdb to find the root
cause, it shows

#0  0x00007fba3c8e0553 in select () from /lib64/libc.so.6
#1  0x00000000004088e9 in main_loop_wait (timeout=<value optimized
out>) at /root/rpmbuild/BUILD/xen-4.0.1/tools/ioemu-dir/vl.c:3782
#2  0x000000000047798a in main_loop () at helper2.c:576
#3  0x000000000040ccd1 in main (argc=<value optimized out>,
argv=<value optimized out>, envp=<value optimized out>)
    at /root/rpmbuild/BUILD/xen-4.0.1/tools/ioemu-dir/vl.c:6150

Is this a known issue or is there any patch to fix it?

Thanks

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