From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([2001:4830:134:3::10]:35034) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1X0VWs-0007U2-BV for qemu-devel@nongnu.org; Fri, 27 Jun 2014 08:45:28 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1X0VWi-0001Nv-7s for qemu-devel@nongnu.org; Fri, 27 Jun 2014 08:45:22 -0400 Received: from mx1.redhat.com ([209.132.183.28]:25425) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1X0VWi-0001Ng-0G for qemu-devel@nongnu.org; Fri, 27 Jun 2014 08:45:12 -0400 Received: from int-mx13.intmail.prod.int.phx2.redhat.com (int-mx13.intmail.prod.int.phx2.redhat.com [10.5.11.26]) by mx1.redhat.com (8.14.4/8.14.4) with ESMTP id s5RCjBEm023846 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK) for ; Fri, 27 Jun 2014 08:45:11 -0400 Date: Fri, 27 Jun 2014 08:45:09 -0400 From: Luiz Capitulino Message-ID: <20140627084509.491fbbd0@redhat.com> In-Reply-To: <53AC8F79.9060908@redhat.com> References: <20140626161954.198f2fbf@redhat.com> <53AC8F79.9060908@redhat.com> MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Subject: Re: [Qemu-devel] [old BUG]: -watchdog-action pause hangs QEMU List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: Paolo Bonzini Cc: rjones@redhat.com, qemu-devel On Thu, 26 Jun 2014 23:24:09 +0200 Paolo Bonzini wrote: > Il 26/06/2014 22:19, Luiz Capitulino ha scritto: > > Here goes a gdb backtrace: > > > > #0 0x00007f298ce31759 in syscall () from /lib64/libc.so.6 > > #1 0x00007f29939b0b56 in futex_wait (ev=0x7f2994548f18, val=4294967295) > > at /home/lcapitulino/work/src/upstream/qmp-unstable/util/qemu-thread-posix.c:304 > > #2 0x00007f29939b0c68 in qemu_event_wait (ev=0x7f2994548f18) > > at /home/lcapitulino/work/src/upstream/qmp-unstable/util/qemu-thread-posix.c:400 > > #3 0x00007f299392a066 in qemu_clock_enable (type=QEMU_CLOCK_VIRTUAL, enabled=false) > > at /home/lcapitulino/work/src/upstream/qmp-unstable/qemu-timer.c:171 > > #4 0x00007f2993653cc1 in pause_all_vcpus () at /home/lcapitulino/work/src/upstream/qmp-unstable/cpus.c:1078 > > #5 0x00007f2993652d3f in do_vm_stop (state=RUN_STATE_WATCHDOG) at /home/lcapitulino/work/src/upstream/qmp-unstable/cpus.c:532 > > #6 0x00007f2993654273 in vm_stop (state=RUN_STATE_WATCHDOG) at /home/lcapitulino/work/src/upstream/qmp-unstable/cpus.c:1221 > > #7 0x00007f29938c638d in watchdog_perform_action () at /home/lcapitulino/work/src/upstream/qmp-unstable/hw/watchdog/watchdog.c:126 > > #8 0x00007f29938c679d in i6300esb_timer_expired (vp=0x7f2994d17d40) > > at /home/lcapitulino/work/src/upstream/qmp-unstable/hw/watchdog/wdt_i6300esb.c:197 > > #9 0x00007f299392a8ce in timerlist_run_timers (timer_list=0x7f2994548ec0) > > at /home/lcapitulino/work/src/upstream/qmp-unstable/qemu-timer.c:491 > > #10 0x00007f299392a916 in qemu_clock_run_timers (type=QEMU_CLOCK_VIRTUAL) > > at /home/lcapitulino/work/src/upstream/qmp-unstable/qemu-timer.c:502 > > #11 0x00007f299392abfe in qemu_clock_run_all_timers () at /home/lcapitulino/work/src/upstream/qmp-unstable/qemu-timer.c:608 > > #12 0x00007f299392956a in main_loop_wait (nonblocking=0) at /home/lcapitulino/work/src/upstream/qmp-unstable/main-loop.c:490 > > #13 0x00007f299374b40c in main_loop () at /home/lcapitulino/work/src/upstream/qmp-unstable/vl.c:2007 > > #14 0x00007f2993752e5d in main (argc=23, argv=0x7fffc6a5a738, envp=0x7fffc6a5a7f8) > > at /home/lcapitulino/work/src/upstream/qmp-unstable/vl.c:4526 > > > > Can you include the backtrace for the VCPU thread(s) too? Here you go, I start the guest with only one vCPU. #0 0x00007f9d89d2a59d in __lll_lock_wait () from /lib64/libpthread.so.0 #1 0x00007f9d89d26179 in _L_lock_814 () from /lib64/libpthread.so.0 #2 0x00007f9d89d26048 in pthread_mutex_lock () from /lib64/libpthread.so.0 #3 0x00007f9d8b5b4687 in qemu_mutex_lock (mutex=0x7f9d8ba9c340 ) at /home/lcapitulino/work/src/upstream/qmp-unstable/util/qemu-thread-posix.c:76 #4 0x00007f9d8b257c02 in qemu_mutex_lock_iothread () at /home/lcapitulino/work/src/upstream/qmp-unstable/cpus.c:1044 #5 0x00007f9d8b26e8bb in kvm_cpu_exec (cpu=0x7f9d8e04b830) at /home/lcapitulino/work/src/upstream/qmp-unstable/kvm-all.c:1716 #6 0x00007f9d8b2577c5 in qemu_kvm_cpu_thread_fn (arg=0x7f9d8e04b830) at /home/lcapitulino/work/src/upstream/qmp-unstable/cpus.c:874 #7 0x00007f9d89d23f33 in start_thread () from /lib64/libpthread.so.0 #8 0x00007f9d84a3aded in clone () from /lib64/libc.so.6