[Date Prev][Date Next]   [Thread Prev][Thread Next]   [Thread Index] [Date Index] [Author Index]

Re: [libvirt] [PATCH] Free object after *Destroy in python bindings

On Mon, May 19, 2008 at 04:21:55PM -0400, Cole Robinson wrote:
> Cole Robinson wrote:
> > The patch below fixes an issue in the python bindings with the
> > vir*Destroy methods. After the object is successfully destroyed,
> > the payload is cleared, using 'self._o = None'. This unfortunately
> > screws up virt object reference counts, as the payload should be 
> > free'd using the appropriate vir*Free function.
> > 
> Hmm, I might be wrong about this. Reading the virDomainDestroy
> description in libvirt.c, destroy is supposed to free the
> domain object if the operation is successful. The qemu driver
> currently does not do this. In fact, from what I gather, none
> of the drivers do this.

The docs are wrong. Destory merely hard-kills the object being managed.
It does not free memory associated with the object.

> If the virDomainDestroy comment is correct, then the original
> python statement is sufficient, but the drivers need to have
> a few virDomainFree's added.

I believe your patch is correct - python should not be dropping its 
reference to the underlying C object, afte invoking the destroy method.
It should be only be dropped after free is called

|: Red Hat, Engineering, Boston   -o-   http://people.redhat.com/berrange/ :|
|: http://libvirt.org  -o-  http://virt-manager.org  -o-  http://ovirt.org :|
|: http://autobuild.org       -o-         http://search.cpan.org/~danberr/ :|
|: GnuPG: 7D3B9505  -o-  F3C9 553F A1DA 4AC2 5648 23C1 B3DF F742 7D3B 9505 :|

[Date Prev][Date Next]   [Thread Prev][Thread Next]   [Thread Index] [Date Index] [Author Index]