From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from [140.186.70.92] (port=35073 helo=eggs.gnu.org) by lists.gnu.org with esmtp (Exim 4.43) id 1OEOkA-0004N1-3q for qemu-devel@nongnu.org; Tue, 18 May 2010 11:30:07 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.69) (envelope-from ) id 1OEOjt-0003vg-IJ for qemu-devel@nongnu.org; Tue, 18 May 2010 11:29:51 -0400 Received: from zion.dlh.net ([91.198.192.1]:57570 helo=mail.dlh.net) by eggs.gnu.org with esmtp (Exim 4.69) (envelope-from ) id 1OEOjt-0003vP-DW for qemu-devel@nongnu.org; Tue, 18 May 2010 11:29:49 -0400 Received: from lieven2.kamp.de ([82.141.1.225] helo=[172.21.12.69]) by mail.dlh.net with asmtp (Exim 3.36 #24 (Debian)) id 1OEOjq-0007EB-00 for ; Tue, 18 May 2010 17:29:46 +0200 Message-ID: <4BF2B26A.9090902@dlh.net> Date: Tue, 18 May 2010 17:29:46 +0200 From: Peter Lieven MIME-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Subject: [Qemu-devel] opensuse 11.2 guest hangs after live migration with clocksource=kvm-clock List-Id: qemu-devel.nongnu.org List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: qemu-devel@nongnu.org Hi all, i would like to debug a problem that I encountered some time ago with opensuse 11.2 and also with Ubuntu (karmic/lucid). If I run an opensuse guest 64-bit and do not touch the clocksource settings the guest almost everytime hangs after live migration at: (gdb) thread apply all bt Thread 2 (Thread 0x7f846782a950 (LWP 27356)): #0 0x00007f8467d24cd7 in ioctl () from /lib/libc.so.6 #1 0x000000000042b945 in kvm_run (env=0x2468170) at /usr/src/qemu-kvm-0.12.4/qemu-kvm.c:921 #2 0x000000000042cea2 in kvm_cpu_exec (env=0x2468170) at /usr/src/qemu-kvm-0.12.4/qemu-kvm.c:1651 #3 0x000000000042d62c in kvm_main_loop_cpu (env=0x2468170) at /usr/src/qemu-kvm-0.12.4/qemu-kvm.c:1893 #4 0x000000000042d76d in ap_main_loop (_env=0x2468170) at /usr/src/qemu-kvm-0.12.4/qemu-kvm.c:1943 #5 0x00007f8468caa3ba in start_thread () from /lib/libpthread.so.0 #6 0x00007f8467d2cfcd in clone () from /lib/libc.so.6 #7 0x0000000000000000 in ?? () Thread 1 (Thread 0x7f84692d96f0 (LWP 27353)): #0 0x00007f8467d25742 in select () from /lib/libc.so.6 #1 0x000000000040c25a in main_loop_wait (timeout=1000) at /usr/src/qemu-kvm-0.12.4/vl.c:3994 #2 0x000000000042dcf1 in kvm_main_loop () at /usr/src/qemu-kvm-0.12.4/qemu-kvm.c:2126 #3 0x000000000040c98c in main_loop () at /usr/src/qemu-kvm-0.12.4/vl.c:4212 #4 0x000000000041054b in main (argc=31, argv=0x7fffa91351c8, envp=0x7fffa91352c8) at /usr/src/qemu-kvm-0.12.4/vl.c:6252 If I run the same guest with kernel parameter clocksource=acpi_pm, the migration succeeds reliably. The hosts runs: /kernel: /2.6.33.3, /bin: /qemu-kvm-0.12.4, /mod: /2.6.33.3 I invoke qemu-kvm with: /usr/bin/qemu-kvm-0.12.4 -net none -drive file=/dev/sdb,if=ide,boot=on,cache=none,aio=native -m 1024 -cpu qemu64,model_id='Intel(R) Xeon(R) CPU E5430 @ 2.66GHz' -monitor tcp:0:4001,server,nowait -vnc :1 -name 'test' -boot order=dc,menu=on -k de -pidfile /var/run/qemu/vm-149.pid -mem-path /hugepages -mem-prealloc -rtc base=utc,clock=vm -usb -usbdevice tablet The Guest is: OpenSuse 11.2 64-bit with Kernel 2.6.31.5-0.1-desktop #1 SMP PREEMPT 2009-10-26 15:49:03 +0100 x86_64 The clocksource automatically choosen is kvm-clock. Feedback appreciated. I have observed the same problem with 0.12.2 and also with old binaries provided by Ubuntu Karmic (kvm-88). BR, Peter