В письме от Воскресенье, 30-июн-2013 03:41:37 пользователь Александр написал:
В письме от Вторник, 25-июн-2013 11:47:10 пользователь Michal Privoznik
написал:
On 24.06.2013 11:36, Александр wrote:
libvirtd will lock if for example kill programm which established connection,>
only sigkill + restart helps., to reproduce: virConnectPtr libvirt_connection = virConnectOpen("qemu:///system"); if(libvirt_connection == NULL) {
std::cout<<"failed to connect to qemu:///system\n"; exit(-1);
} exit(0);
Unfortunately, I'm unable to reproduce. Can you 't a a bt' again? Are you able to try the current git HEAD?
Michal
i also fail to reproduce it now, but my program still locks libvirt, currently i trying to create domain with
<?xml version="1.0" encoding="UTF-8"?> <domain type="kvm"> <tittle>Automatically created domain with default configuration</tittle> <uuid>70a2e046-769c-43d2-88a0-5310ce33cbf8</uuid> <name>vm1</name> <description>no description</description> <os> <type>hvm</type> <boot dev="cdrom"/> <boot dev="hd"/> </os> <vcpu>1</vcpu> <memory unit="MB">512</memory> <cpu model="host-model"> <topology sockets="1" cores="1" threads="1"/> </cpu> <clock offset="localtime"/> <devices> <graphics type="vnc" autoport="yes" password="admin"/> <channel type="unix"> <source mode="bind" path="/var/run/vm1.sock"/> <target type="virtio" name="org.guest_agent.0"/> </channel> </devices> </domain>
backtrace from gdb
t a a bt
Thread 11 (Thread 0x7f57484a2700 (LWP 17528)): #0 0x00007f574edda90c in pthread_cond_wait@@GLIBC_2.3.2 () from /lib64/libpthread.so.0 #1 0x00007f574f17b246 in virCondWait () from /usr/lib64/libvirt.so.0 #2 0x00007f574f17d26b in virThreadPoolWorker.18087 () from /usr/lib64/libvirt.so.0 #3 0x00007f574f1adef1 in virThreadHelper.17820 () from /usr/lib64/libvirt.so.0 #4 0x00007f574edd6d63 in start_thread () from /lib64/libpthread.so.0 #5 0x00007f574eb0e04d in clone () from /lib64/libc.so.6
Thread 10 (Thread 0x7f5747ca1700 (LWP 17529)): #0 0x00007f574eddd344 in __lll_lock_wait () from /lib64/libpthread.so.0 #1 0x00007f574edd8e56 in _L_lock_511 () from /lib64/libpthread.so.0 #2 0x00007f574edd8caa in pthread_mutex_lock () from /lib64/libpthread.so.0 #3 0x00007f574f12bcd1 in virDomainObjListSearchName.23513 () from /usr/lib64/libvirt.so.0 #4 0x00007f574f129e95 in virHashSearch () from /usr/lib64/libvirt.so.0 #5 0x00007f574f0bf46d in virDomainObjListAddLocked.isra.54.25425 () from /usr/lib64/libvirt.so.0 #6 0x00007f574f0bf557 in virDomainObjListAdd () from /usr/lib64/libvirt.so.0 #7 0x00007f5741e7e8bf in qemuDomainDefineXML.40992 () from /usr/lib64/libvirt/connection-driver/libvirt_driver_qemu.so #8 0x00007f574f06eddb in virDomainDefineXML () from /usr/lib64/libvirt.so.0 #9 0x00007f574facac6d in remoteDispatchDomainDefineXMLHelper.10498 () #10 0x00007f574f04ec27 in virNetServerProgramDispatch () from /usr/lib64/libvirt.so.0 #11 0x00007f574f04f128 in virNetServerHandleJob.78060 () from /usr/lib64/libvirt.so.0 #12 0x00007f574f17d1db in virThreadPoolWorker.18087 () from /usr/lib64/libvirt.so.0 #13 0x00007f574f1adef1 in virThreadHelper.17820 () from /usr/lib64/libvirt.so.0 #14 0x00007f574edd6d63 in start_thread () from /lib64/libpthread.so.0 #15 0x00007f574eb0e04d in clone () from /lib64/libc.so.6
Thread 9 (Thread 0x7f57474a0700 (LWP 17530)): #0 0x00007f574edda90c in pthread_cond_wait@@GLIBC_2.3.2 () from /lib64/libpthread.so.0 #1 0x00007f574f17b246 in virCondWait () from /usr/lib64/libvirt.so.0 #2 0x00007f574f17d26b in virThreadPoolWorker.18087 () from /usr/lib64/libvirt.so.0 #3 0x00007f574f1adef1 in virThreadHelper.17820 () from /usr/lib64/libvirt.so.0 #4 0x00007f574edd6d63 in start_thread () from /lib64/libpthread.so.0 #5 0x00007f574eb0e04d in clone () from /lib64/libc.so.6
Thread 8 (Thread 0x7f5746c9f700 (LWP 17531)): #0 0x00007f574edda90c in pthread_cond_wait@@GLIBC_2.3.2 () from /lib64/libpthread.so.0 #1 0x00007f574f17b246 in virCondWait () from /usr/lib64/libvirt.so.0 #2 0x00007f574f17d26b in virThreadPoolWorker.18087 () from /usr/lib64/libvirt.so.0 #3 0x00007f574f1adef1 in virThreadHelper.17820 () from /usr/lib64/libvirt.so.0 #4 0x00007f574edd6d63 in start_thread () from /lib64/libpthread.so.0 #5 0x00007f574eb0e04d in clone () from /lib64/libc.so.6
Thread 7 (Thread 0x7f574649e700 (LWP 17532)): #0 0x00007f574edda90c in pthread_cond_wait@@GLIBC_2.3.2 () from /lib64/libpthread.so.0 #1 0x00007f574f17b246 in virCondWait () from /usr/lib64/libvirt.so.0 #2 0x00007f574f17d26b in virThreadPoolWorker.18087 () from /usr/lib64/libvirt.so.0 #3 0x00007f574f1adef1 in virThreadHelper.17820 () from /usr/lib64/libvirt.so.0 #4 0x00007f574edd6d63 in start_thread () from /lib64/libpthread.so.0 #5 0x00007f574eb0e04d in clone () from /lib64/libc.so.6
Thread 6 (Thread 0x7f5745c9d700 (LWP 17533)): #0 0x00007f574edda90c in pthread_cond_wait@@GLIBC_2.3.2 () from /lib64/libpthread.so.0 #1 0x00007f574f17b246 in virCondWait () from /usr/lib64/libvirt.so.0 #2 0x00007f574f17d153 in virThreadPoolWorker.18087 () from /usr/lib64/libvirt.so.0 #3 0x00007f574f1adef1 in virThreadHelper.17820 () from /usr/lib64/libvirt.so.0 #4 0x00007f574edd6d63 in start_thread () from /lib64/libpthread.so.0 #5 0x00007f574eb0e04d in clone () from /lib64/libc.so.6
Thread 5 (Thread 0x7f574549c700 (LWP 17534)): #0 0x00007f574edda90c in pthread_cond_wait@@GLIBC_2.3.2 () from /lib64/libpthread.so.0 #1 0x00007f574f17b246 in virCondWait () from /usr/lib64/libvirt.so.0 #2 0x00007f574f17d153 in virThreadPoolWorker.18087 () from /usr/lib64/libvirt.so.0 #3 0x00007f574f1adef1 in virThreadHelper.17820 () from /usr/lib64/libvirt.so.0 #4 0x00007f574edd6d63 in start_thread () from /lib64/libpthread.so.0 #5 0x00007f574eb0e04d in clone () from /lib64/libc.so.6
Thread 4 (Thread 0x7f5744c9b700 (LWP 17535)): #0 0x00007f574edda90c in pthread_cond_wait@@GLIBC_2.3.2 () from /lib64/libpthread.so.0 ---Type <return> to continue, or q <return> to quit--- #1 0x00007f574f17b246 in virCondWait () from /usr/lib64/libvirt.so.0 #2 0x00007f574f17d153 in virThreadPoolWorker.18087 () from /usr/lib64/libvirt.so.0 #3 0x00007f574f1adef1 in virThreadHelper.17820 () from /usr/lib64/libvirt.so.0 #4 0x00007f574edd6d63 in start_thread () from /lib64/libpthread.so.0 #5 0x00007f574eb0e04d in clone () from /lib64/libc.so.6
Thread 3 (Thread 0x7f574449a700 (LWP 17536)): #0 0x00007f574edda90c in pthread_cond_wait@@GLIBC_2.3.2 () from /lib64/libpthread.so.0 #1 0x00007f574f17b246 in virCondWait () from /usr/lib64/libvirt.so.0 #2 0x00007f574f17d153 in virThreadPoolWorker.18087 () from /usr/lib64/libvirt.so.0 #3 0x00007f574f1adef1 in virThreadHelper.17820 () from /usr/lib64/libvirt.so.0 #4 0x00007f574edd6d63 in start_thread () from /lib64/libpthread.so.0 #5 0x00007f574eb0e04d in clone () from /lib64/libc.so.6
Thread 2 (Thread 0x7f5743c99700 (LWP 17537)): #0 0x00007f574edda90c in pthread_cond_wait@@GLIBC_2.3.2 () from /lib64/libpthread.so.0 #1 0x00007f574f17b246 in virCondWait () from /usr/lib64/libvirt.so.0 #2 0x00007f574f17d153 in virThreadPoolWorker.18087 () from /usr/lib64/libvirt.so.0 #3 0x00007f574f1adef1 in virThreadHelper.17820 () from /usr/lib64/libvirt.so.0 #4 0x00007f574edd6d63 in start_thread () from /lib64/libpthread.so.0 #5 0x00007f574eb0e04d in clone () from /lib64/libc.so.6
Thread 1 (Thread 0x7f574fa45740 (LWP 17527)): #0 0x00007f574eb0476d in poll () from /lib64/libc.so.6 #1 0x00007f574f14ad5e in virEventPollRunOnce () from /usr/lib64/libvirt.so.0 #2 0x00007f574f11841d in virEventRunDefaultImpl () from /usr/lib64/libvirt.so.0 #3 0x00007f574f18d79d in virNetServerRun () from /usr/lib64/libvirt.so.0 #4 0x00007f574fac4149 in main ()
i using git build 3a214482ec07be65adcfa9d8e08ad55a333589bb
i have found source of problem, my code looks like this: int count = virConnectListAllDomains(connection, NULL, 0); .... domain = virDomainDefineXML(connection, d.write_to_string().c_str()); call to virConnectListAllDomains always cause libvirt deadlock. and another question, is here exists any other way to determinate number of persistent domains ?