web2 wrote:
> Hi
>
> ----------------ursprüngliche Nachricht-----------------
> Von: "Michal Privoznik" mprivozn@xxxxxxxxxx
> An: "web2" ustermann78@xxxxxx , "libvirt-users redhat.com"
> , "libvirt-list redhat.com"
> Datum: Wed, 01 Oct 2014 18:12:45 +0200
> -------------------------------------------------
>
>
>
>> On 01.10.2014 10:31, web2 wrote:
>>
>>> Hello,
>>>
>>> sorry for my later answer.
>>>
>>> so, after i started libvirtd (no vm´s running) and attach gdb i get the
>>> following threads
>>>
>>> (gdb) info thread
>>> Id Target Id Frame
>>> 11 Thread 0x7f18fef4e700 (LWP 20695) "libvirtd"
>>> pthread_cond_wait@@GLIBC_2.3.2 () at
>>> ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
>>> 10 Thread 0x7f18fe74d700 (LWP 20696) "libvirtd"
>>> pthread_cond_wait@@GLIBC_2.3.2 () at
>>> ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
>>> 9 Thread 0x7f18fdf4c700 (LWP 20697) "libvirtd"
>>> pthread_cond_wait@@GLIBC_2.3.2 () at
>>> ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
>>> 8 Thread 0x7f18fd74b700 (LWP 20698) "libvirtd"
>>> pthread_cond_wait@@GLIBC_2.3.2 () at
>>> ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
>>> 7 Thread 0x7f18fcf4a700 (LWP 20699) "libvirtd"
>>> pthread_cond_wait@@GLIBC_2.3.2 () at
>>> ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
>>> 6 Thread 0x7f18fc749700 (LWP 20700) "libvirtd"
>>> pthread_cond_wait@@GLIBC_2.3.2 () at
>>> ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
>>> 5 Thread 0x7f18fbf48700 (LWP 20701) "libvirtd"
>>> pthread_cond_wait@@GLIBC_2.3.2 () at
>>> ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
>>> 4 Thread 0x7f18fb747700 (LWP 20702) "libvirtd"
>>> pthread_cond_wait@@GLIBC_2.3.2 () at
>>> ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
>>> 3 Thread 0x7f18faf46700 (LWP 20703) "libvirtd"
>>> pthread_cond_wait@@GLIBC_2.3.2 () at
>>> ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
>>> 2 Thread 0x7f18fa745700 (LWP 20704) "libvirtd"
>>> pthread_cond_wait@@GLIBC_2.3.2 () at
>>> ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
>>> * 1 Thread 0x7f190892f840 (LWP 20694) "libvirtd" 0x00007f190677d7cd in
>>> poll () at ../sysdeps/unix/syscall-template.S:81
>>>
>>> if i restore an persistent domain, i see the following in gdb:
>>>
>>> Detaching after fork from child process 20880.
>>> Detaching after fork from child process 20882.
>>> [New Thread 0x7f190893d700 (LWP 20883)]
>>> Detaching after fork from child process 20890.
>>> Detaching after fork from child process 20906.
>>>
>>> (gdb) info thread
>>> Id Target Id Frame
>>> 12 Thread 0x7f190893d700 (LWP 20883) "libvirtd" 0x00007f1906e6684d in
>>> read () at ../sysdeps/unix/syscall-template.S:81
>>> 11 Thread 0x7f18fef4e700 (LWP 20695) "libvirtd"
>>> pthread_cond_wait@@GLIBC_2.3.2 () at
>>> ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
>>> 10 Thread 0x7f18fe74d700 (LWP 20696) "libvirtd"
>>> pthread_cond_wait@@GLIBC_2.3.2 () at
>>> ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
>>> 9 Thread 0x7f18fdf4c700 (LWP 20697) "libvirtd"
>>> pthread_cond_wait@@GLIBC_2.3.2 () at
>>> ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
>>> 8 Thread 0x7f18fd74b700 (LWP 20698) "libvirtd"
>>> pthread_cond_wait@@GLIBC_2.3.2 () at
>>> ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
>>> 7 Thread 0x7f18fcf4a700 (LWP 20699) "libvirtd"
>>> pthread_cond_wait@@GLIBC_2.3.2 () at
>>> ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
>>> 6 Thread 0x7f18fc749700 (LWP 20700) "libvirtd"
>>> pthread_cond_wait@@GLIBC_2.3.2 () at
>>> ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
>>> 5 Thread 0x7f18fbf48700 (LWP 20701) "libvirtd"
>>> pthread_cond_wait@@GLIBC_2.3.2 () at
>>> ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
>>> 4 Thread 0x7f18fb747700 (LWP 20702) "libvirtd"
>>> pthread_cond_wait@@GLIBC_2.3.2 () at
>>> ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
>>> 3 Thread 0x7f18faf46700 (LWP 20703) "libvirtd"
>>> pthread_cond_wait@@GLIBC_2.3.2 () at
>>> ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
>>> 2 Thread 0x7f18fa745700 (LWP 20704) "libvirtd"
>>> pthread_cond_wait@@GLIBC_2.3.2 () at
>>> ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
>>> * 1 Thread 0x7f190892f840 (LWP 20694) "libvirtd" 0x00007f190677d7cd in
>>> poll () at ../sysdeps/unix/syscall-template.S:81
>>>
>>> if i now destroy this vm i get the following:
>>>
>>>
>>> (gdb) info thread
>>> Id Target Id Frame
>>> 12 Thread 0x7f190893d700 (LWP 20883) "libvirtd" 0x00007f1906e6684d in
>>> read () at ../sysdeps/unix/syscall-template.S:81
>>> 11 Thread 0x7f18fef4e700 (LWP 20695) "libvirtd"
>>> pthread_cond_wait@@GLIBC_2.3.2 () at
>>> ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
>>> 10 Thread 0x7f18fe74d700 (LWP 20696) "libvirtd"
>>> pthread_cond_wait@@GLIBC_2.3.2 () at
>>> ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
>>> 9 Thread 0x7f18fdf4c700 (LWP 20697) "libvirtd"
>>> pthread_cond_wait@@GLIBC_2.3.2 () at
>>> ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
>>> 8 Thread 0x7f18fd74b700 (LWP 20698) "libvirtd"
>>> pthread_cond_wait@@GLIBC_2.3.2 () at
>>> ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
>>> 7 Thread 0x7f18fcf4a700 (LWP 20699) "libvirtd"
>>> pthread_cond_wait@@GLIBC_2.3.2 () at
>>> ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
>>> 6 Thread 0x7f18fc749700 (LWP 20700) "libvirtd"
>>> pthread_cond_wait@@GLIBC_2.3.2 () at
>>> ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
>>> 5 Thread 0x7f18fbf48700 (LWP 20701) "libvirtd"
>>> pthread_cond_wait@@GLIBC_2.3.2 () at
>>> ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
>>> 4 Thread 0x7f18fb747700 (LWP 20702) "libvirtd"
>>> pthread_cond_wait@@GLIBC_2.3.2 () at
>>> ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
>>> 3 Thread 0x7f18faf46700 (LWP 20703) "libvirtd"
>>> pthread_cond_wait@@GLIBC_2.3.2 () at
>>> ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
>>> 2 Thread 0x7f18fa745700 (LWP 20704) "libvirtd"
>>> pthread_cond_wait@@GLIBC_2.3.2 () at
>>> ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
>>> * 1 Thread 0x7f190892f840 (LWP 20694) "libvirtd" 0x00007f190677d7cd in
>>> poll () at ../sysdeps/unix/syscall-template.S:81
>>>
>>> attaching thread Id 12 and bt:
>>> (gdb) thread 12
>>> [Switching to thread 12 (Thread 0x7f190893d700 (LWP 20883))]
>>> #0 0x00007f1906e6684d in read () at
>>> ../sysdeps/unix/syscall-template.S:81
>>> 81 T_PSEUDO (SYSCALL_SYMBOL, SYSCALL_NAME, SYSCALL_NARGS)
>>> (gdb) bt
>>> #0 0x00007f1906e6684d in read () at
>>> ../sysdeps/unix/syscall-template.S:81
>>> #1 0x00007f18f8c415be in read (__nbytes=16, __buf=0x7f18d4000c50,
>>> __fd=26) at /usr/include/bits/unistd.h:44
>>> #2 read_all (fd=26, data=data@entry =0x7f18d4000c50, len=len@entry =16,
>>> nonblocking=nonblocking@entry =0) at xs.c:374
>>> #3 0x00007f18f8c41675 in read_message (h=h@entry =0x7f18e8001070,
>>> nonblocking=nonblocking@entry =0) at xs.c:1139
>>> #4 0x00007f18f8c41e90 in read_thread (arg=0x7f18e8001070) at xs.c:1211
>>> #5 0x00007f1906e5ff35 in start_thread (arg=0x7f190893d700) at
>>> pthread_create.c:309
>>> #6 0x00007f1906787c3d in clone () at
>>> ../sysdeps/unix/sysv/linux/x86_64/clone.S:111
>>>
>>> and then bt full:
>>>
>>> (gdb) bt full
>>> #0 0x00007f1906e6684d in read () at
>>> ../sysdeps/unix/syscall-template.S:81
>>> No locals.
>>> #1 0x00007f18f8c415be in read (__nbytes=16, __buf=0x7f18d4000c50,
>>> __fd=26) at /usr/include/bits/unistd.h:44
>>> No locals.
>>> #2 read_all (fd=26, data=data@entry =0x7f18d4000c50, len=len@entry =16,
>>> nonblocking=nonblocking@entry =0) at xs.c:374
>>> done = <optimized out>
>>> #3 0x00007f18f8c41675 in read_message (h=h@entry =0x7f18e8001070,
>>> nonblocking=nonblocking@entry =0) at xs.c:1139
>>> __clframe = {__cancel_routine = <optimized out>, __cancel_arg =
>>> 0x7f18d4000c40, __do_it = 1, __cancel_type = <optimized out>}
>>> msg = 0x7f18d4000c40
>>> body = 0x0
>>> saved_errno = 0
>>> ret = -1
>>> #4 0x00007f18f8c41e90 in read_thread (arg=0x7f18e8001070) at xs.c:1211
>>> h = 0x7f18e8001070
>>> fd = <optimized out>
>>>
>> This stack doesn't come from libvirt. I suspect it comes from a library
>> that libvirtd is linked with.
Yep, a thread created by libxl.
>> Maybe libxl? What's the connection uri
>> you're using?
>>
>
> i use xen:///. as i said early, i do tests with xen xm´s. xend is disabled, so i use the libxl.
>
Earlier you mentioned using libvirt 1.1.3 for your Xen hosts. Have you
tried the freshly released 1.2.9? I didn't see the problem with libvirt
git master and Xen 4.4.1.
Regards,
Jim
--
libvir-list mailing list
libvir-list@xxxxxxxxxx
https://www.redhat.com/mailman/listinfo/libvir-list