Hi, I'm using a KVM guest to stream audio using darkice to an icecast2 server on the same guest. The guest uses an emulated ES1370 sound card to capture the host's audio input (ASUS Xonar DX) using the ALSA backend. After 1 or 2 days, the qemu-kvm process locks up, using up 100% CPU, apparently spinning in audio/rate_template.h (See gdb session below). Do you have any advice on how to solve this problem? I haven't tried the -no-kvm-* switches, please advice if that would be useful in this case. Unfortunately it takes up to 2 days for the bug to happen, so trying all possible configurations is a bit time-consuming. More information here: http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=685353 Thank you for your time, Mike cpu model: AMD Turion(tm) II Neo N40L Dual-Core Processor qemu-kvm version: 1.1.1 (Debian package by Michael Tokarev), happened also with 1.1.0 host: Debian wheezy, 3.2.23, x86_64 guest: Debian wheezy, 3.2.23, x86_64 /usr/bin/kvm -S -M pc-1.1 -enable-kvm -m 1024 -smp 1,sockets=1,cores=1,threads=1 -name mp3 -uuid 25d2b76c-9533-c55a-b5e2-07da213886f1 -nodefconfig -nodefaults -chardev socket,id=charmonitor,path=/var/lib/libvirt/qemu/mp3.monitor,server,nowait -mon chardev=charmonitor,id=monitor,mode=control -rtc base=utc -no-shutdown -device piix3-usb-uhci,id=usb,bus=pci.0,addr=0x1.0x2 -drive file=/dev/vg_vms/lv_mp3,if=none,id=drive-virtio-disk0,format=raw -device virtio-blk-pci,scsi=off,bus=pci.0,addr=0x5,drive=drive-virtio-disk0,id=virtio-disk0,bootindex=1 -netdev tap,fd=20,id=hostnet0 -device virtio-net-pci,netdev=hostnet0,id=net0,mac=52:54:00:b1:e7:80,bus=pci.0,addr=0x3 -chardev pty,id=charserial0 -device isa-serial,chardev=charserial0,id=serial0 -vnc 127.0.0.1:0 -vga cirrus -device ES1370,id=sound0,bus=pci.0,addr=0x6 -device i6300esb,id=watchdog0,bus=pci.0,addr=0x7 -watchdog-action reset -device virtio-balloon-pci,id=balloon0,bus=pci.0,addr=0x4 gdb output (truncated, full output at http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=685353) (gdb) info threads Id Target Id Frame 2 Thread 0x7fccec446700 (LWP 19893) "kvm" 0x00007fccf3f5fcec in __lll_lock_wait () from /lib/x86_64-linux-gnu/libpthread.so.0 * 1 Thread 0x7fccf7c8c8e0 (LWP 19892) "kvm" st_rate_flow (opaque=0x7fccf9248f40, ibuf=0x7fccf9150320, obuf=0x7fccf91975b0, isamp=isamp@entry=0x7fffe9ff6550, osamp=osamp@entry=0x7fffe9ff6554) at /tmp/buildd/qemu-kvm-1.1.1+dfsg/audio/rate_template.h:75 (gdb) thread apply all bt full Thread 2 (Thread 0x7fccec446700 (LWP 19893)): #0 0x00007fccf3f5fcec in __lll_lock_wait () from /lib/x86_64-linux-gnu/libpthread.so.0 No symbol table info available. #1 0x00007fccf3f5b339 in _L_lock_926 () from /lib/x86_64-linux-gnu/libpthread.so.0 No symbol table info available. #2 0x00007fccf3f5b15b in pthread_mutex_lock () from /lib/x86_64-linux-gnu/libpthread.so.0 No symbol table info available. #3 0x00007fccf7f18c29 in qemu_mutex_lock (mutex=mutex@entry=0x7fccf8c39a80) at /tmp/buildd/qemu-kvm-1.1.1+dfsg/qemu-thread-posix.c:54 err = <optimized out> __func__ = "qemu_mutex_lock" #4 0x00007fccf7f729f0 in qemu_mutex_lock_iothread () at /tmp/buildd/qemu-kvm-1.1.1+dfsg/cpus.c:897 No locals. #5 0x00007fccf7f9a0b6 in kvm_cpu_exec (env=env@entry=0x7fccf902d510) at /tmp/buildd/qemu-kvm-1.1.1+dfsg/kvm-all.c:1268 run = 0x7fccf7d80000 ret = <optimized out> run_ret = 0 #6 0x00007fccf7f71591 in qemu_kvm_cpu_thread_fn (arg=0x7fccf902d510) at /tmp/buildd/qemu-kvm-1.1.1+dfsg/cpus.c:752 env = 0x7fccf902d510 r = <optimized out> #7 0x00007fccf3f58b50 in start_thread () from /lib/x86_64-linux-gnu/libpthread.so.0 No symbol table info available. #8 0x00007fccf3ca370d in clone () from /lib/x86_64-linux-gnu/libc.so.6 No symbol table info available. #9 0x0000000000000000 in ?? () No symbol table info available. Thread 1 (Thread 0x7fccf7c8c8e0 (LWP 19892)): #0 st_rate_flow (opaque=0x7fccf9248f40, ibuf=0x7fccf9150320, obuf=0x7fccf91975b0, isamp=isamp@entry=0x7fffe9ff6550, osamp=osamp@entry=0x7fffe9ff6554) at /tmp/buildd/qemu-kvm-1.1.1+dfsg/audio/rate_template.h:75 rate = 0x7fccf9248f40 istart = 0x7fccf9148810 iend = 0x7fccf91730c0 ostart = 0x7fccf91975b0 oend = 0x7fccf9197870 ilast = {l = -50003968, r = 171704320} icur = <optimized out> out = <optimized out> t = <optimized out> #1 0x00007fccf7e08a96 in audio_pcm_sw_read (sw=0x7fccf9260bf0, buf=0x7fffe9ff65d0, size=<optimized out>) at /tmp/buildd/qemu-kvm-1.1.1+dfsg/audio/audio.c:952 hw = 0x7fccf924aa20 samples = <optimized out> live = <optimized out> ret = <optimized out> swlim = <optimized out> isamp = 10891 osamp = 44 rpos = 0 total = <optimized out> src = <optimized out> dst = <optimized out> __FUNCTION__ = "audio_pcm_sw_read" #2 0x00007fccf7e9ac0a in es1370_transfer_audio (s=s@entry=0x7fccf90a9470, d=0x7fccf90a9988, loop_sel=32768, max=<optimized out>, irq=irq@entry=0x7fffe9ff7624) at /tmp/buildd/qemu-kvm-1.1.1+dfsg/hw/es1370.c:803 acquired = <optimized out> to_copy = 4096 tmpbuf = "\344\002\230\017f\002\006\022\243\001~\021\230\000\000\r\251\377\035\005z\377{\374O\000\332\365\320\001\032\362\224\003]\360U\005\330\357\347\006\375\357i\b\\\360\062\n\273\360h\f9\361\263\016\070\362N\020\336\363`\020\233\365H\016{\366\357\n\234\366\351\a|\366\365\005\065\366\364\004n\365\230\004\372\363\242\004B\362\320\004\026\361\346\004\365\360\363\004\214\361\017\005E\362\323\004\034\363C\004\246\364\304\003\374\366\306\003\\\371p\004W\372\222\005\341\370\343\006\004\365\067\b\357\357}\t\202\353m\n\330\351\256\n\254\354C\n\226\362\024\t\346\367P\a\341\372\313\005\064\374\063\005\353\374\230\005y\375\221\006\336\375\270\a\025\376\366\b#\376>\n\367\375\062\v\372\375}\v\271\376P\v\357\377\357\n\t\001\256\n\213\001\023\v\033\001]\f\203\377\032\016\316\374R\017a\371Y\017\330\365\357\r,\363 \v\273\362\v\bA\364\215\005\210\366{\003n\370a\001\220\371=\377T\372\\\375v\373\372\373f\375T\373\275\377\265\373h\001\352\374\264\001$\376\340\000\312\376$\377\300\376\204\374a\376[\371\032\376H\366\a\376\t\364\363\375n\363\254\375\032\365\063\375\316\370\217\374P\375G\3---Type <return> to continue, or q <return> to quit--- 74q\000\240\374z\000\025\375t\375\061\375\375\370\n\375\346\364\027\375\363\361\275\375\363\357\365\376\316\356%\000&\357V\000R\361\066\377\374\363\205\375\300\365\277\374\376\366\344\375\033\370\220\000\037\371v\003\332\371\223\005\367\371\274\006\063\371U\a\272\367\304\a@\366W\b\\\365\372\b\323\364\352\b\322\363\071\b\032\362f\a\275\357\306\006\353\354\200\006\357\351\211\006\060\347"... addr = 1021014016 sc = 1023 csc_bytes = 4096 cnt = 7168 size = 16383 left = <optimized out> transferred = <optimized out> temp = 4096 index = 2 #3 0x00007fccf7e9af54 in es1370_run_channel (s=0x7fccf90a9470, chan=<optimized out>, free_or_avail=<optimized out>) at /tmp/buildd/qemu-kvm-1.1.1+dfsg/hw/es1370.c:877 new_status = 96 max_bytes = <optimized out> irq = <optimized out> d = <optimized out> b = 0x7fccf833ec30 #4 0x00007fccf7e0a4e7 in audio_run_in (s=<optimized out>) at /tmp/buildd/qemu-kvm-1.1.1+dfsg/audio/audio.c:1487 sw = 0x7fccf9260bf0 captured = <optimized out> hw = <optimized out> #5 audio_run (msg=msg@entry=0x7fccf80529d1 "alsa run (running)") at /tmp/buildd/qemu-kvm-1.1.1+dfsg/audio/audio.c:1546 s = 0x7fccf84029c0 #6 0x00007fccf7e04b91 in alsa_poll_handler (opaque=0x7fccf924aaa8) at /tmp/buildd/qemu-kvm-1.1.1+dfsg/audio/alsaaudio.c:233 err = <optimized out> count = <optimized out> state = <optimized out> revents = 1 #7 0x00007fccf7e5b406 in qemu_iohandler_poll (readfds=readfds@entry=0x7fccf880f060, writefds=writefds@entry=0x7fccf880f0e0, xfds=xfds@entry=0x7fccf880f160, ret=ret@entry=1) at /tmp/buildd/qemu-kvm-1.1.1+dfsg/iohandler.c:122 pioh = 0x7fccf90e7990 ioh = 0x7fccf9274e40 #8 0x00007fccf7eedb6a in main_loop_wait (nonblocking=<optimized out>) at /tmp/buildd/qemu-kvm-1.1.1+dfsg/main-loop.c:497 ret = 1 timeout = 4294967295 #9 0x00007fccf7dfd943 in main_loop () at /tmp/buildd/qemu-kvm-1.1.1+dfsg/vl.c:1566 nonblocking = <optimized out> last_io = 1 #10 main (argc=<optimized out>, argv=<optimized out>, envp=<optimized out>) at /tmp/buildd/qemu-kvm-1.1.1+dfsg/vl.c:3702 i = <optimized out> snapshot = 0 linux_boot = <optimized out> icount_option = 0x0 initrd_filename = <optimized out> kernel_filename = <optimized out> kernel_cmdline = <optimized out> boot_devices = "cad", '\000' <repeats 29 times> ds = 0x7fccf90470b0 dcl = <optimized out> cyls = 0 heads = 0 secs = 0 translation = 0 hda_opts = <optimized out> opts = <optimized out> machine_opts = <optimized out> olist = <optimized out> optind = 48 optarg = 0x7fffe9ff8f67 "virtio-balloon-pci,id=balloon0,bus=pci.0,addr=0x4" loadvm = 0x0 machine = 0x7fccf83fdb60 ---Type <return> to continue, or q <return> to quit--- cpu_model = 0x0 vga_model = 0x7fffe9ff8ee4 "cirrus" pid_file = 0x0 incoming = 0x0 defconfig = <optimized out> userconfig = false log_mask = 0x0 log_file = 0x0 mem_trace = {malloc = 0x7fccf7ee6c40 <malloc_and_trace>, realloc = 0x7fccf7ee6c00 <realloc_and_trace>, free = 0x7fccf7ee6bc0 <free_and_trace>, calloc = 0, try_malloc = 0, try_realloc = 0} trace_events = 0x0 trace_file = 0x0 (gdb) step 73 in /tmp/buildd/qemu-kvm-1.1.1+dfsg/audio/rate_template.h (gdb) 75 in /tmp/buildd/qemu-kvm-1.1.1+dfsg/audio/rate_template.h (gdb) 71 in /tmp/buildd/qemu-kvm-1.1.1+dfsg/audio/rate_template.h (gdb) 72 in /tmp/buildd/qemu-kvm-1.1.1+dfsg/audio/rate_template.h (gdb) 73 in /tmp/buildd/qemu-kvm-1.1.1+dfsg/audio/rate_template.h (gdb) 75 in /tmp/buildd/qemu-kvm-1.1.1+dfsg/audio/rate_template.h (gdb) 73 in /tmp/buildd/qemu-kvm-1.1.1+dfsg/audio/rate_template.h (gdb) 75 in /tmp/buildd/qemu-kvm-1.1.1+dfsg/audio/rate_template.h (gdb) 71 in /tmp/buildd/qemu-kvm-1.1.1+dfsg/audio/rate_template.h (gdb) 72 in /tmp/buildd/qemu-kvm-1.1.1+dfsg/audio/rate_template.h (gdb) -- To unsubscribe from this list: send the line "unsubscribe kvm" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
