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 _______________________________________________ Xen-devel mailing list Xen-devel@lists.xensource.com http://lists.xensource.com/xen-devel