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When libxl registers an FD with the libxl driver, the refcnt of the associated libxlDomainObjPrivate object is incremented. The refcnt is decremented when libxl deregisters the FD. But some FDs are only deregistered when their libxl ctx is freed, which unfortunately is done in the libxlDomainObjPrivate dispose function. With references held by the FDs, libxlDomainObjPrivate is never disposed. I added the ref/unref in FD registration/deregistration when adding the same in timer registration/deregistration. For timers, this is a simple approach to ensuring the libxlDomainObjPrivate is not disposed prior to their expirtation, which libxl guarantees will occur. It is not needed for FDs, and only causes libxlDomainObjPrivate to leak. This patch removes the reference on libxlDomainObjPrivate for FD registrations, but retains them for timer registrations. Tested on the latest releases of Xen supported by the libxl driver: 4.2.3, 4.3.1, and 4.4.0 RC3. Signed-off-by: Jim Fehlig <jfehlig@suse.com>
LibVirt : simple API for virtualization
Libvirt is a C toolkit to interact with the virtualization capabilities
of recent versions of Linux (and other OSes). It is free software
available under the GNU Lesser General Public License. Virtualization of
the Linux Operating System means the ability to run multiple instances of
Operating Systems concurrently on a single hardware system where the basic
resources are driven by a Linux instance. The library aim at providing
long term stable C API initially for the Xen paravirtualization but
should be able to integrate other virtualization mechanisms if needed.
Daniel Veillard <veillard@redhat.com>