11:27 a.m.
Hi
----------------ursprüngliche Nachricht-----------------
Von: "Michal Privoznik" mprivozn(a)redhat.com
An: "web2" ustermann78(a)web.de , "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@(a)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@(a)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@(a)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@(a)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@(a)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@(a)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@(a)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@(a)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@(a)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@(a)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@(a)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@(a)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@(a)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@(a)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@(a)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@(a)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@(a)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@(a)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@(a)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@(a)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@(a)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@(a)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@(a)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@(a)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@(a)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@(a)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@(a)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@(a)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@(a)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@(a)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. 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.
all the best
max
> #5 0x00007f1906e5ff35 in start_thread (arg=0x7f190893d700) at
> pthread_create.c:309
> __res = <optimized out>
> pd = 0x7f190893d700
> now = <optimized out>
> unwind_buf = {cancel_jmp_buf = {{jmp_buf = {139745494816512,
> 9092725460686644452, 1, 0, 139745494817216, 139745494816512,
> -9214988784542636828, -9214975709026802460}, mask_was_saved = 0}}, priv
> = {pad = {0x0, 0x0, 0x0, 0x0},
> data = {prev = 0x0, cleanup = 0x0, canceltype = 0}}}
> not_first_call = <optimized out>
> pagesize_m1 = <optimized out>
> sp = <optimized out>
> freesize = <optimized out>
> #6 0x00007f1906787c3d in clone () at
> ../sysdeps/unix/sysv/linux/x86_64/clone.S:111
> No locals.
Michal
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