[Libguestfs] Virt-v2v conversion issue

Richard W.M. Jones rjones at redhat.com
Tue Oct 14 14:51:59 UTC 2014

On Tue, Oct 14, 2014 at 02:43:31PM +0000, VONDRA Alain wrote:
> Rich,
> The conversion did'nt finish, and I don't have any core dump.
> The qemu-img seems to hang, but doesn't crash...

Please connect gdb to the hung process and get a stack trace to find
out where it's hanging.

'strace -p ...' output might also be enlightening, if it is not hung
but doing "something" (albeit not making progress).

I should also note that if qemu-img convert hits a lot of zeroes in
the source (possible, because fstrim wasnt successful), then it will
consume CPU skipping them, but won't write anything for a while.


Richard Jones, Virtualization Group, Red Hat http://people.redhat.com/~rjones
Read my programming and virtualization blog: http://rwmj.wordpress.com
libguestfs lets you edit virtual machines.  Supports shell scripting,
bindings from many languages.  http://libguestfs.org

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