Hi Paolo:
On 03/29/2016 02:11 AM, Paolo Bonzini wrote:
On 28/03/2016 05:55, TU BO wrote:
Hi Cornelia:
I got two crash with qemu master + "[PATCH 0/6] virtio: refactor host
notifiers",
Hi Tu Bo,
please always include the assertion patch at
https://lists.gnu.org/archive/html/qemu-block/2016-03/msg00546.html in
your tests. Can you include the backtrace from all threads with that patch?
thanks for your reminder about the assertion patch. Here is the backtrace with qemu
master + assertion patch + "[PATCH 0/6] virtio: refactor host notifiers",
I got two crashes,
1. For 1st crash,
(gdb) thread apply all bt
Thread 8 (Thread 0x3ff8daf1910 (LWP 52859)):
#0 0x000003ff9718ec62 in do_futex_timed_wait () from /lib64/libpthread.so.0
#1 0x000003ff9718ed76 in sem_timedwait () from /lib64/libpthread.so.0
#2 0x000002aa2d755868 in qemu_sem_timedwait (sem=0x3ff88000fa8, ms=<optimized
out>) at util/qemu-thread-posix.c:245
#3 0x000002aa2d6803e4 in worker_thread (opaque=0x3ff88000f40) at
thread-pool.c:92
#4 0x000003ff971884c6 in start_thread () from /lib64/libpthread.so.0
#5 0x000003ff96802ec2 in thread_start () from /lib64/libc.so.6
Thread 7 (Thread 0x3ff8e679910 (LWP 52856)):
#0 0x000003ff9718ec62 in do_futex_timed_wait () from /lib64/libpthread.so.0
#1 0x000003ff9718ed76 in sem_timedwait () from /lib64/libpthread.so.0
#2 0x000002aa2d755868 in qemu_sem_timedwait (sem=0x2aa2e1fbfa8, ms=<optimized
out>) at util/qemu-thread-posix.c:245
#3 0x000002aa2d6803e4 in worker_thread (opaque=0x2aa2e1fbf40) at
thread-pool.c:92
#4 0x000003ff971884c6 in start_thread () from /lib64/libpthread.so.0
#5 0x000003ff96802ec2 in thread_start () from /lib64/libc.so.6
Thread 6 (Thread 0x3ff9497f910 (LWP 52850)):
#0 0x000003ff9718c50e in pthread_cond_wait@@GLIBC_2.3.2 () from
/lib64/libpthread.so.0
#1 0x000003ff96d19792 in g_cond_wait () from /lib64/libglib-2.0.so.0
#2 0x000002aa2d7165d2 in wait_for_trace_records_available () at
trace/simple.c:147
---Type <return> to continue, or q <return> to quit---
#3 writeout_thread (opaque=<optimized out>) at trace/simple.c:165
#4 0x000003ff96cfa44c in g_thread_proxy () from /lib64/libglib-2.0.so.0
#5 0x000003ff971884c6 in start_thread () from /lib64/libpthread.so.0
#6 0x000003ff96802ec2 in thread_start () from /lib64/libc.so.6
Thread 5 (Thread 0x3ff8efff910 (LWP 52855)):
#0 0x000003ff967f819a in ioctl () from /lib64/libc.so.6
#1 0x000002aa2d546f3e in kvm_vcpu_ioctl (cpu=cpu@entry=0x2aa2e239030,
type=type@entry=44672)
at /usr/src/debug/qemu-2.5.50/kvm-all.c:1984
#2 0x000002aa2d54701e in kvm_cpu_exec (cpu=0x2aa2e239030) at
/usr/src/debug/qemu-2.5.50/kvm-all.c:1834
#3 0x000002aa2d533cd6 in qemu_kvm_cpu_thread_fn (arg=<optimized out>) at
/usr/src/debug/qemu-2.5.50/cpus.c:1056
#4 0x000003ff971884c6 in start_thread () from /lib64/libpthread.so.0
#5 0x000003ff96802ec2 in thread_start () from /lib64/libc.so.6
Thread 4 (Thread 0x3ff951ff910 (LWP 52849)):
#0 0x000003ff967fcf56 in syscall () from /lib64/libc.so.6
#1 0x000002aa2d755a36 in futex_wait (val=<optimized out>, ev=<optimized out>)
at util/qemu-thread-posix.c:292
#2 qemu_event_wait (ev=0x2aa2ddb5914 <rcu_call_ready_event>) at
util/qemu-thread-posix.c:399
#3 0x000002aa2d765002 in call_rcu_thread (opaque=<optimized out>) at
util/rcu.c:250
#4 0x000003ff971884c6 in start_thread () from /lib64/libpthread.so.0
#5 0x000003ff96802ec2 in thread_start () from /lib64/libc.so.6
---Type <return> to continue, or q <return> to quit---
Thread 3 (Thread 0x3ff978e0bf0 (LWP 52845)):
#0 0x000003ff967f66e6 in ppoll () from /lib64/libc.so.6
#1 0x000002aa2d68928e in ppoll (__ss=0x0, __timeout=0x0, __nfds=<optimized out>,
__fds=<optimized out>) at /usr/include/bits/poll2.h:77
#2 qemu_poll_ns (fds=<optimized out>, nfds=<optimized out>, timeout=-1) at
qemu-timer.c:313
#3 0x000002aa2d688b02 in os_host_main_loop_wait (timeout=-1) at main-loop.c:251
#4 main_loop_wait (nonblocking=<optimized out>) at main-loop.c:505
#5 0x000002aa2d4faade in main_loop () at vl.c:1933
#6 main (argc=<optimized out>, argv=<optimized out>, envp=<optimized out>) at
vl.c:4646
Thread 2 (Thread 0x3ff8ffff910 (LWP 52851)):
#0 0x000003ff967f66e6 in ppoll () from /lib64/libc.so.6
#1 0x000002aa2d68928e in ppoll (__ss=0x0, __timeout=0x0, __nfds=<optimized out>,
__fds=<optimized out>) at /usr/include/bits/poll2.h:77
#2 qemu_poll_ns (fds=<optimized out>, nfds=<optimized out>, timeout=-1) at
qemu-timer.c:313
#3 0x000002aa2d68a788 in aio_poll (ctx=0x2aa2de77e00, blocking=<optimized
out>) at aio-posix.c:453
#4 0x000002aa2d5b909c in iothread_run (opaque=0x2aa2de77220) at iothread.c:46
#5 0x000003ff971884c6 in start_thread () from /lib64/libpthread.so.0
#6 0x000003ff96802ec2 in thread_start () from /lib64/libc.so.6
Thread 1 (Thread 0x3ff8f7ff910 (LWP 52854)):
#0 0x000003ff9673b650 in raise () from /lib64/libc.so.6
---Type <return> to continue, or q <return> to quit---
#1 0x000003ff9673ced8 in abort () from /lib64/libc.so.6
#2 0x000003ff96733666 in __assert_fail_base () from /lib64/libc.so.6
#3 0x000003ff967336f4 in __assert_fail () from /lib64/libc.so.6
#4 0x000002aa2d562608 in virtio_blk_handle_output (vdev=<optimized out>,
vq=<optimized out>)
at /usr/src/debug/qemu-2.5.50/hw/block/virtio-blk.c:595
