On 2013-02-20 11:28, Stefan Hajnoczi wrote: > Convert iohandler_select_fill() and iohandler_select_poll() to use > GPollFD instead of rfds/wfds/xfds.
Since this commmit, I'm getting QEMU lock-ups, apparently slirp is involved (the Linux guest tries to start its network at this point): (gdb) thread apply all bt Thread 3 (Thread 0x7fffed0e3700 (LWP 26788)): #0 __lll_lock_wait () at ../nptl/sysdeps/unix/sysv/linux/x86_64/lowlevellock.S:136 #1 0x00007ffff44c7294 in _L_lock_999 () from /lib64/libpthread.so.0 #2 0x00007ffff44c70aa in __pthread_mutex_lock (mutex=0x5555560afcc0) at pthread_mutex_lock.c:61 #3 0x00005555558945e9 in qemu_mutex_lock (mutex=<value optimized out>) at /data/qemu/util/qemu-thread-posix.c:57 #4 0x00005555557d9da5 in kvm_cpu_exec (env=0x55555689c9f0) at /data/qemu/kvm-all.c:1564 #5 0x0000555555780091 in qemu_kvm_cpu_thread_fn (arg=0x55555689c9f0) at /data/qemu/cpus.c:759 #6 0x00007ffff44c4a3f in start_thread (arg=0x7fffed0e3700) at pthread_create.c:297 #7 0x00007ffff2fb871d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112 #8 0x0000000000000000 in ?? () Thread 2 (Thread 0x7fffed8e4700 (LWP 26787)): #0 sem_timedwait () at ../nptl/sysdeps/unix/sysv/linux/x86_64/sem_timedwait.S:103 #1 0x0000555555894a93 in qemu_sem_timedwait (sem=0x555556090020, ms=<value optimized out>) at /data/qemu/util/qemu-thread-posix.c:237 #2 0x000055555575116e in worker_thread (unused=<value optimized out>) at /data/qemu/thread-pool.c:88 #3 0x00007ffff44c4a3f in start_thread (arg=0x7fffed8e4700) at pthread_create.c:297 #4 0x00007ffff2fb871d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112 #5 0x0000000000000000 in ?? () Thread 1 (Thread 0x7ffff7fab760 (LWP 26784)): #0 0x00007ffff44cc763 in recvfrom () at ../sysdeps/unix/syscall-template.S:82 #1 0x000055555574b67d in recvfrom (so=0x555556bd2f50) at /usr/include/bits/socket2.h:77 #2 sorecvfrom (so=0x555556bd2f50) at /data/qemu/slirp/socket.c:498 #3 0x000055555574a160 in slirp_pollfds_poll (pollfds=0x555556511240, select_error=0) at /data/qemu/slirp/slirp.c:619 #4 0x000055555570ec99 in main_loop_wait (nonblocking=<value optimized out>) at /data/qemu/main-loop.c:514 #5 0x000055555577821d in main_loop (argc=<value optimized out>, argv=<value optimized out>, envp=<value optimized out>) at /data/qemu/vl.c:2002 #6 main (argc=<value optimized out>, argv=<value optimized out>, envp=<value optimized out>) at /data/qemu/vl.c:4334 Thread 1 blocks in recvfrom, not returning, not releasing the global lock. Any idea? Jan -- Siemens AG, Corporate Technology, CT RTC ITP SDP-DE Corporate Competence Center Embedded Linux
